The HD7750 you see before you is a reference 800Mhz version, meaning that it runs off the power provided by the motherboard without a PCI-Express connector. This does mean, however, that the most you'd ever be able to overclock it to is 880Mhz seeing as there's very little headroom left with the card taking up almost 65w of power. Thankfully the RAM hasn't been downgraded and runs at GDDR5 speeds of 4.5Ghz on a 128-bit interface, enough to give some much-needed muscle to games and high-definition movies with 3D playback.