If I’ve learnt anything from the last few years writing for this site, it’s that AMD has a pattern for their product improvements. When they had bought out ATi in 2006 the latter company had just released the X1900 series and things were looking up nicely. Fast-forward past the HD3000 series, AMD was pretty much on par with whatever Nvidia was pushing out and the HD3870 still carries the honour of pushing the company out in front of benchmarks, at least for half a year. When they still had the HD4000 series kicking ass halfway through 2009, they introduced a “wild card”, the HD4770. It was the blueprint for the eventual HD5000 series and was responsible for allowing AMD to figure out DDR5 RAM as well as giving them time to sell a 40nm GPU to gauge public perception and interest. At that point 40nm wasn’t quite ready for mass production, but AMD got the ball rolling for the single product line anyway.

Credit: Anandtech
The HD4770 was a cut-down version of ATi’s HD4850, but kept some parts from the HD4730, limiting the bus size to 128 bits, but keeping most of the HD4850′s innards intact. It was more efficient than the HD4830 and, with some light overclocking, could be made to go much faster than its bigger brothers. When AMD came out guns blazing with the HD5000 series, they brought with them experience gained from the HD4770 and we all know how well that tactic worked. While weird and experimental, the HD4770 could be considered every bit as important as the HD3870 was to enthusiasts back then.
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Posted by Wesley Fick
Mar 23, 2013