Home > Articles by: JP Dormehl

Author Archive

When the lights go out

If there’s a power failure and your PC is on, you could lose data. Windows could blue-screen every time you try to boot, especially if you’re running RAID 5 and the power cuts out while you’re writing data to your hard drives. The resulting power surge that occurs when the power comes back on could fry your motherboard, processor, and power supply, as well.

Considering the small fortune you’ve spent building it, why would you be willing to put your PC at risk? Three little letters could save you a whole heap of trouble: U-P-S. An uninterruptible power supply can mean the difference between tears and wondering what everyone else is complaining about.

A typical UPS

A typical UPS.

A UPS does exactly what the name implies: it provides uninterrupted power. There are many different types of uninterruptible power supplies, ranging in size from ones that can fit in a 3.5″ hard drive bay to massive mechanical devices that weigh many tonnes.

If you walk into your nearest PC shop, you’ll most likely have the option to choose from an offline (or standby) UPS and a line interactive UPS.

An offline UPS is very basic, providing only surge protection and battery backup, and typically supplies 5-20 minutes of standby power. They usually won’t include a battery monitoring tool or self diagnostic capability. These limitations make them hard to recommend unless you are really on a shoe-string budget.

A line interactive UPS is similar to an offline UPS, but it can also compensate for under and over voltage situations thanks to a variable-voltage autotransformer. An autotransformer is an electrical transformer that can add or subtract powered coils of wire to control the output voltage. Autotransformers can compensate for a wide range of voltages, but due to cost and complexity concerns they are only designed to cover 190 V to 240 V for 220 V power. Anything higher or lower would result in the battery being switched on. If you have to measure the voltage coming out of your wall socket you’ll see that the voltage rarely ever stays at 220 V.

A beeeeg, industrial UPS

A beeeeg, industrial UPS.

Let’s say that your PC at load consumes 440 watts. That works out to 2 amps at 220 V. If the voltage dropped to 200 V the UPS would draw 2.2 amps to compensate.

So how do you decide what size UPS is right for you? If you have a decent power supply with active PFC, a good rule of thumb is 1:1. So, if you have a 500 watt PSU, 500 KvA should be sufficient. If you have a rather old, or no name brand, power supply with a passive PFC the ratio moves up to 1:1.5. This means a 300 watt power supply would need a 450 KvA UPS. Getting a larger UPS won’t damage your PC, and it will allow you to keep your PC on for longer in the case of a power failure.

A decent UPS is much better than a standard surge protector.

What’s next? That’s EASSy

The next undersea cable planning to steal our hearts is the East African Submarine Cable System. The project is expected to be completed by the end of June 2010.  EASSy is well under way with 40% of the cable construction already been completed.

EASSy is a consortium of 27 operators building an open access international fibre-optic submarine cable, comprising Botswana Telecommunications Corporation, Bharti, BT, Comoros Telecom, Etisalat, Neotel South Africa, France Telecom, Mauritius Telecom, MTN International, Saudi Telecom, and Sudan Telecom.

Similar to Seacom, EASSy will travel along the East cost of Africa with 9 cable landing stations, namely, Port Sudan, Djibouti, Mogadishu, Mombasa, Dar es Salaam, Moroni (in Comoros), Toliary (in Madagascar), Maputo, and Mtunzini (where Seacom will also be landing).

At first glance, EASSy will only be connecting African countries together. What many of you may not know is that EASSy will also connect to the Europe India Gateway Submarine Cable System. The EIG will stretch from the UK to France, Spain, Portugal, Gibraltar, Monaco, Libya, Egypt, Djibouti, the United Arab Emirates and, of course, India.

the-eig

The cable’s purpose is to provide a central linking point for other cable systems already in the pipeline, such as Eassy and the West African Cable System (WACS). EIG will be the first direct, high bandwidth, fibre optic cable connecting United Kingdom to India. EIG will have a capacity of 3.84 terabits per second and has upgradeable transmission facilities to provide for future bandwidth growth.

All this bandwidth would be useless without a terrestrial network connecting the cables to actual end users and businesses. Last month Cameroon’s incumbent Camtel announced that it would build a 5,600km national fibre backbone, with links to Gabon, Congo-Brazzaville, and Equatorial Guinea. The World Bank will be providing financial assistance for these links as well, also funding links to Chad, Central African Republic, and DRC.

Orange Madagascar announced that it had completed the Lion cable project. The 1,800km cable offers 1.3 Tbps, connecting Madagascar, Reunion, and Maritius. The cable should cut existing tariffs by five times.

neotelHere in the good ol’ RSA, we also have progress. Dark Fibre Africa has recently launched its 800km fibre network in collaboration with Cisco Systems. Dark Fibre Africa is not a service provider, though. It owns, builds, maintains, secures, and monitors the dark fibre network, leasing out the infrastructure. Any businesses wanting to make use of the DFA network will need to light the fibre themselves, meaning they will need to purchase the necessary equipment to be able to connect to DFA’s network.

In January, Neotel announced it would partner with MTN to build a 5,000km national network linking major urban centres with Seacom, with the first leg of the network connecting Johannesburg to Durban scheduled to be completed before the end of the year.

Neotel already has 2000- 3000km of fibre in the metro areas of Johannesburg, Pretoria, Durban and Cape Town. The financial burden of the long-haul network is expected to be R2-billion on cabling alone(transmission equipment will bring the cost to R2.5-billion), a cost that Neotel will share with MTN and Vodacom.

All your bandwidth are belong to us

The big news this week is that Seacom has been delayed by a month due to pirate activity in April and May 2009.

According to the Seacom blog, an increase in pirate activity in April and May 2009 has necessitated a change in their installation plans, which will result in a delay of around a month.

The launch date has been moved from 27 June 2009 to 23 July 2009.

Seacom is still making progress, though: that section of the cable has since been completed, and the section connecting Mumbai to Africa is expected to be spliced shortly. All the South and East African landing stations have already undergone successful testing.

seacom-logo

90% drop in bandwidth prices? EASSyer said than done.

When Seacom was first announced, a 90% drop in bandwidth pricing was claimed to become a reality. We’ve already seen about half of that drop, though. Keep in mind that bandwidth costs aren’t the only costs that ISPs have to deal with: there are quite a few overheads. It costs the same to administer a 1 gig account as a 100 gig one, so pricing on the lower end won’t drop. One must also keep in mind the costs of the network provider’s infrastructure, the cost of the customer’s modem, as well as marketing, distribution, and support.

The large ISPs can’t switch all their bandwidth to Seacom the minute it goes live, as they have contracts in place which need to lapse, meaning that price drops are even further away than we might like.

Telkom’s pitiful announcement gives a painful taste of what the telecommunication companies intend to satisfy us with. They claim that there is too much pent-up demand and that EASSy and MAINONE are needed before we expect a real drop in pricing.

brian-seligmanIn February, general data manager at MTN Brian Seligman said “we are going to see changes in pricing [as opposed to real decreases], we are going to see changes in structure, and one of the biggest misnomers out there is that these international cables landing are going to drop the price of data by 90%”.

Head of Commercial at iBurst, Steve Briggs, has also been quoted as saying “consumers should not expect to see the sharp falls in broadband pricing that some of the more optimistic commentators have predicted”.

MTN’s Seligman says, “You are going to see different ways of packaging; you are going to see some incredibly innovative ideas from MTN over the course of this year in terms of making data significantly more affordable, significantly less expensive for customers, and that basic R2/MB – that’s not going to change significantly in the foreseeable future.”

Unfortunately there’s no real reason for ISPs to drop bandwidth costs. The vast majority of subscribers do not even deplete their current 2GB limits, so instead of dropping prices extra data will be bundled keeping revenues high, similar to Vodacom’s current data deal.

Deescount, Deescount

Everyone loves a good bargain. Going through my two favourite online shops – Take2 and Prophecy – brings up quite a few good deals, especially when it comes to graphics cards.

hd3870jpgStarting on the small side, with the cheapest “real gamer” card: Prophecy has the Force3D HD4670 512MB for R740.77. That is awesome value for money on a budget. Next up we have the Force3D HD3870 512MB. It’s definitely worth it for the extra cash you spend over the 4670, and you get 9600GT class performance at a great price. Moving up about R400, we get possibly the biggest bang for buck card you’ll ever see. The Force3d 4850 512MB is R 1338.08, just a few months ago this card was over R2000. Yes, stock is only expected at the end of the month, but at this price it’s bound to be sold out. Next up and about R500 more, we get the Force3D HD4870 256bit GDDR5 512MB. Just three months ago this card was over R3000, it was a good deal back then, and a great deal now. With the direction that games are moving in, even if you have a 1680*1050 monitor, I’d recommend the Force3D HD4870 256bit GDDR5 1GB for R2496.60. If you like to play with a lot of AA and AF, it’s definitely the better choice.

As most people would’ve noticed by now, I’ve listed only ATI cards. There’s a reason for this. With DX11 around the corner and with some features being backwards compatible it makes sense choosing a DX10.1 card over a plain DX10 card. DX10.1 is not just a marketing gimmick any more. There is a handful of games out now that support the API. H.A.W.X., for one, sees a 10-15% increase in FPS over DX10 when using DX10.1.

For some reason, many people still see Nvidia as having the upper hand when it comes to drivers. ATI started releasing WHQL certified drivers every month quite a few years back, and hot fixes also do get released as needed. The only area where Nvidia actually pulls ahead is when it comes to Linux support.

samsung-monitorIf you already have a 9600GT and don’t have the cash for a 4870, you could consider the Zotac Nvidia GeForce 9600GT – 512MB for R1022 if your power supply is up to the task.

Monitors are another area where price drops have come through nicely, recently. If you don’t mind too much about vert- games, the Samsung 2494HS for R2551 and Samsung 2333SW R2208.02 are great buys. With both monitors supporting the full HD resolution of 1920*1080 and the 2494HS sporting a HDMI input, they are perfect for watching DVDs and HD movies on your PC. Actually, if you get the 2494HS you might be able to chuck out your old TV, as the unit has built in speakers.

It’s really not hard to find a good deal if you know where to look.

Next Gen Connectors

With the fastest SSD drives today saturating the bandwidth available on SATA II, a maximum transfer speed of 6 Gb/s will soon become a reality with SATA 3. SATA 3 was recently made official by the Serial ATA International Organization

The new SATA 3.0 is backwards compatible with all the previous standards, but also includes features such as a new Native Command Queuing (NCQ) streaming command for isochronous data transfers, NCQ Management that optimizes performance by enabling host processing and management of outstanding NCQ commands, improved power management capabilities, a small Low Insertion Force (LIF) connector for 1.8-inch drives, a connector for 7mm optical disk drives for thin and light notebooks, and alignment with the INCITS ATA8-ACS standard.

OCZ's throttle drive no longer requires external power

OCZ's throttle drive no longer requires external power.

While eSATA has transfer speeds triple that of USB 2.0 and FireWire 400, the lack of power has been a major drawback. Another standard coming out of the Serial ATA International Organization is the new Power Over eSATA cable specification which enables both data and power to be transferred through a single cable. MSI recently showed off its new upcoming list of eight notebooks and one motherboard(the AM3 MSI 780FX-GD70) sporting Power Over eSATA.

Moving on to consumer electronics, the HDMI Licensing Group recently unveiled HDMI 1.4, featuring many new enhancements that should make life easier for those of us with Internet-connected living rooms. The new HDMI Ethernet Channel (HEC) feature will allow up to 100Mbps data transfers between HDMI 1.4 compatible devices. This should allow Internet-connected HDTVs using HEC-enabled HDMI ports to provide Internet connection sharing with other HEC-enabled devices such as game consoles.

Another new feature is Automatic Content Enhancement (ACE), which provides increased resolution support of up to 4,096 x 2,160 “Quad-HD” resolution at up to 30Hz, and content recognition that should automatically optimize the TV’s picture settings based on the content being displayed.

HDMI mini and micro connectors are also confirmed in the new 1.4 specification, which will allow 1080p video support for a variety of portable electronic devices. The HDMI Licensing Group did not say why someone would want HD resolutions on a mobile screen.

hdmi-micro-image

The new Micro HDMI connector is not compatible with micro USB.

The HDMI group is also working on an Automotive Connection System (ACS) that will bring a heavy-duty version of HDMI technology to the automotive industry. It will be an interlocking connector that is specifically designed to tolerate excessive heat, vibrations, and other environmental hazards typical of an automotive environment.

USB 3.0 is also coming along nicely with NEC Electronics introducing the first SuperSpeed USB 3.0 host controller. The µPD720200 is based on the new SuperSpeed USB standard, and offers transfer speeds of up to 5 gigabits per second, about 10 times faster than USB 2.0. NEC expects to start volume production in June.

Bandwidth for Africa

R2 a megabyte! That’s how much you pay when you go out of bundle (OOB) using 3G (on MTN and Vodacom). That’s R2048 a gig! I like buying 10 megabyte bundles thinking I’m getting a good deal – “only” R1024 a gig. On ADSL you can get R60 a gig and that’s shaped. For uncapped you’re looking at R1000 a month excluding line rental, and you still have a rolling threshold during office hours.

The excuse we always get is that bandwidth is limited in South Africa due to there only being one undersea cable supplying us bandwidth, namely SAFE/SAT3. Due to this they manage our usage by not just giving us bit caps, but shaping our connections too. This means that any traffic that’s not for browsing (HTTP/HTTPS) or email (POP3) receives a lower priority. If you play a multiplayer game with overseas servers/players, you will get pings of around 200ms-400ms higher than what you would have got had your line not been shaped.

All this should change come 17th June thanks to the 13 700 km SEACOM (South and East Africa submarine cable systems) undersea cable. SEACOM will connect South Africa, Mozambique, Madagascar, Tanzania and Kenya to India,Egypt, Italy, France, and finally terminate in the United Kingdom. At the moment there aren’t any cables along the East coast of Africa; SEACOM will bring cheap bandwidth to East African countries that could previously only make use of satellites for their bandwidth needs. SEACOM is being designed with a nominal capacity of 1,280 Gb/s, comprised of two fibre pairs. That’s about ten times the amount provided by SAT3/SAFE.

The east coast of Africa won't be clear for much longer.

The east coast of Africa won't be clear for much longer.

SEACOM has already released pricing to the press. Going after volume to bring up profits is something that all South Africans should appreciate. Rumours are that Vodacom will decrease OOB rates by 50% to R1 a meg, and while 50% is great, I still feel that R1024 a gig is a bit much. Nevertheless, the other cell companies will likely announce similar price drops lest they lose subscribers. While bandwidth prices will come down, do not expect your monthly bill to come down by too much. Bandwidth is merely one of the costs that ISPs have. What you will get, though, is more value for your money. That 1 gig account that you pay R199p/m for might just turn into 5 or even 10 gigs.

What I’m worried about is the local infrastructure. Telkom’s aging and poorly maintained ADSL infrastructure is barely coping as it is. With Telkom offering 7.2Mb/s 3G while ADSL speeds are still at around 4Mb/s, I have little faith that they will upgrade the overloaded exchanges. Don’t even get me started on ADSL 2+. At this point, though, I’d actually prefer more usage per month than a faster line. How Telkom calls their packages “broadband” when you can’t even keep your line maxed out for 5% of the month is beyond me.

Bang for your buck pixel pushers

Graphics card round-ups from overseas gaming and hardware sites are all well and good, but generally don’t apply in the SA context, as pricing and availability vary greatly.

Firstly, online shopping is the way to go. While other sites sometimes have better prices, Prophecy and Take 2 generally have great service.

What graphics card is right for you depends mainly on what resolution you game at and how much you are willing to spend. What power supply you have is also a factor. A 400 watt is okay for low- to mid-level graphics cards, with 500 watts more suitable for high-end cards. An online calculator comes in handy once again.

Another thing to keep in mind is what settings you like to play on. If you feel like you have to max out the graphical settings you’ll need to spend much more than someone that just plays The Sims 2 or older Need For Speed titles.

 

Nvidia's 9600 GT

Nvidia's 9600 GT

When looking for graphics cards, the model numbers can be deceiving. An NVIDIA 8800 GT will perform far far better than a 9400 GT even though it’s from an older range. Memory size is also not a good way to judge performance. A 512MB 4850 will always beat a 1GB 4670. In actual fact, you only really need 1 gig of video memory when gaming at resolutions of 1920*1080 or higher with high levels of AA and AF. Even then, some games don’t show that much difference in performance.

Gaming at 1280*1024 or 1440*900

The “light” gamer will only need the ATI Radeon 4650 which comes in at around R800. Going cheaper drops performance significantly, while only saving a couple hundred bucks. For such a gamer, the 4650 should last the whole life of their PC. For the moderate gamer, a 4670 is a great option. Coming in at under R900 from Prophecy, the value is hard to beat. For the heavy gamer on a budget, the 3870 is worth a look for under R1200 (R600 less than the 4850). While the 4850 is great value for money, it might be considered overkill if you are only gaming at 1280*1024.

Gaming at 1680*1050

For the light gamer I will still recommend the 4650. For the moderate gamer, the 3870 becomes the weapon of choice, having enough power to run most games with low levels of AA. If you have an SLI board and wish to use an NVidia card, the 9600 GT for around R1200 is not a bad buy. For the heavy gamer, the 4850 for R1800 is a godsend. It’s main competition being the 9800 GTX+/GTS 250 which are priced around the R2200 mark.

4870freezer

The Freezer cooler keeps this 4870 extremely cool and very quiet.

Gaming at 1920*1080 or 1920*1200

For the light gamer the 4650 is still an option, but I’d consider the 4670 for only R100 more. The moderate gamer should be looking at the 4850 512mb. The heavy gamer has two options depending on the settings they play on. If you need everything maxed out with very high AA and AF, the card to get is the 1 gig 4870 for R3400. If not, you can get a 512mb 4870 for R2600, which is actually better value for money.

Review: Genius ErgoMedia 500 Gaming Explorer

When I first had a good look at the EG500 my thought was that it looked weird but cool at the same time.

pic1-genius-ergomedia-500

The EM500 is comfortable and has a solid feel to it.

With its black handrest, it looks right at home next to my Logitech G15 keyboard. The blue glow of the backlit keys makes it seem like a long-lost sibling. I must mention, though, that as the keys are slanted away from the user, the backlit keys don’t actually help for late night gaming.

When you open the packaging, the first items you need to look for are the manual and the driver CD. Chuck them away. The drivers that come with the device make it unusable by FPS players as some functionality simply isn’t there; namely being able to program the D-pad to user defined keys. Without this functionality there just aren’t enough keys.

As for the manual, it mentions keys that aren’t actually on the device, and doesn’t really make sense. You won’t be needing the manual, though; the device is very easy to set up. Just make sure you pull the latest drivers from Genius’s website to allow full functionality.

You are able to set any key on the device to any key on your keyboard or mouse. You can also set macros. Once you click the “loading” button, your programmed keys are saved to the device. There are 3 presets that you can have at any one time. Switching between them is quick and easy using the “switch” button. The scroll wheel acts just as your mouse scroll wheel.

The EM500 connects to your pc via a USB cable that is around 2m long. One nice little extra is that it includes a built-in sound card with earphone and microphone jacks. It’s no Creative Audigy, but works well.

pic2-ergomedia500-dpad

The D-pad takes a little getting used to.

The EM500 is perfect for those that game using a laptop. Instead of having a keyboard that’s raised off the surface your arms are resting on, the EM500 brings comfort. The EM500 is also great for those who LAN frequently. While there might be one or two too few keys for CoD 4, a gaming mouse like the Logitech G5 easily rectifies this. One could actually use this device with a small USB keypad and leave their full-size keyboard at home.

I readily recommend the ErgoMedia 500 to anyone that games on a laptop. Frequent LANners should try before they buy; the RRP of R460 is a little steep for an input device that you mayor may not need.

Driver issues aside, the ErgoMedia 500 is a competent device.

star1star1star1

Is 1.21 Jiggawatts enough?

Power supplies: Often the least thought about, yet most important part of your PC. Why is it then, that most people buy the totally wrong PSU for their needs by going too small, or way too large?

Is it really that hard to choose a power supply that’s right for your system? Besides just wattage (which isn’t really that informative anyway), there are other considerations. Should you get a single rail or multi rail PSU? With cable management, or without?  What connectors do you need?

How would you know how much power your PC really needs? That’s the easy part. Simply fill in your specs on the online PSU calculator, add 100 watts for some headroom and Bob’s your mother’s brother. So, for the love of Doc Brown, why would someone who runs a 9600GT, 2.2Ghz C ore 2 Duo and 2 gigs DDR3 ram need a 700watt power supply? Really, now! The number of people who think they need a 1KW PSU is staggering.

You don't need a Mr Fusion to power an SLI setup

You don't need a Mr Fusion to power an SLI setup

Let’s look at a few examples. A basic system, Intel Core 2 Duo E4500, 4GB memory, P35 chipset motherboard, ATI Radeon HD 3650, an optical drive and one hard drive, needs around 90W of power at idle. Even at full load on the graphics card, processor, and optical drive, we still have a total power consumption of only 140W. Now, a mid-level system: AMD Phenom X4 9850 BE, 4GB memory, AMD 790X chipset, ATI Radeon HD 3870X2, an optical drive and two hard drives. At idle, with Cool & Quiet enabled, this system uses 168W, while it needs at most 341W  under full load. A high-end system: Intel Core 2 Extreme QX6850, 4GB memory, Nvidia 780i Chipset, Nvidia GeForce 8800 Ultra SLI, an optical drive and four hard drives. The idle power consumption for this setup is around 310W, and once we place full load on everything power consumption increases to 544W.

As I said earlier, wattage isn’t everything. Like LCD monitor response times and contrast ratios, it doesn’t mean much without context. The most important thing is the number of amps on the 12v rail(s). Combined, anywhere between 30 and 50 amps should be fine for your system. To be honest, if you choose a decent brand PSU, you shouldn’t have to worry too much about amperage. Antec, Seasonic, Zalman, Corsair and Enermax are all great PSU brands.

The Antec Neo He 550 watt is great value for money

The Antec Neo He 550 watt is great value for money

Some manufacturers use the peak rating of the PSU when classifying it. For example, the Gigabyte Superb 460 watt can only run at 460 watts for one minute. Its continuous rating is only 390 watts. The 585watt Odin is around 500 watts. Not all Gigabyte power supplies do this though. The Odin GT range is rated for continuous throughput. When you take this into account, it’s easy to see why the Odin GT 550 watt is double the price of the Odin 585 watt.

A decent PSU can be an investment, often outlasting every other component inside your pc.

The path to nLitenment

How often do you re-install Windows? Every month? Every other month? Have you memorized your Windows XP CD key? If you answered yes to any of these questions, you need a little application called nLite. It allows you to slipstream a Windows install. I.E.: You can integrate Windows updates, drivers, and service packs into your Windows install disc so that you don’t have to manually install them. It also allows the creation of an unattended installation disc.

nLite has a few requirements: .NET framework 2.0 needs to be installed; if it isn’t, you will be asked to do so upon startup. You will also obviously need your Windows install disc for the installation files.

pic1nlite_logoTo start, create a folder somewhere on your hard drive. Copy all the files from the Windows CD to this folder, then start up nLite.

Choose your language then click ‘next’, and browse to the folder that you copied your windows files to. The version of Windows you’re using will show up; click ‘next’, then ‘next’ once more. Now you choose the options that you’ll be using. I decided to integrate Service Pack 3 and graphics card drivers, and enabled the unattended and bootable ISO options. After clicking ‘next’ you will have to browse to where the service pack is saved on your PC. Once nLite has integrated the service pack, you will have the option to install updates (KB) if you enabled that option.

Once you have chosen all the updates, click next. The following page is for drivers. Click ‘insert’. You need the .INF files only. If your drivers are .EXEs, you can use a program like 7-Zip to unzip them. Don’t worry if you don’t know which files you need exactly: when you browse to the folder, only the correct files will show up in nLite. Drivers that aren’t WHQL certified might bring up errors. Next, you will get the “remove components” page if you elected to do so. If you are unsure of what you can safely remove, do not remove anything in red. You can also click on the + sign for a brief description of what each component does.

regreg

Don't forget to enable the option "bootable ISO"

Next we have the unattended setup options. These allow you to provide an answer ahead of time to all the questions that Windows typically asks during setup, such as your CD key and time zone. I chose the fully unattended setup. There are varying options, which may come in handy in other situations besides a home user. Each option is explained by clicking on the relevant question mark.

You will then have the option to create an image or to make a bootable disc. I required a DVD as my installation files where larger than 700MB. I pulled out an extra hard drive to test the disc I just created. What followed was the most painless and probably quickest XP install I’ve ever done. Service Pack 3 and my WHQL certified 182.08 Forceware drivers where installed without a hitch.

There is a version of the program for Vista called vLite.


Advertisement

Advertisement

Login / Search

Latest games

Latest opinions

Advertisement