Sapphire Radeon X800 XT - PCI Express
Overclocking The Sapphire X800 XT
Armed with the latest copy of PowerStrip, we set out to overclock the Sapphire Radeon X800 XT. Due to the fact that this card is not a "Platinum Edition", its default core and memory clock speeds are programmed for 500MHz / 500MHz respectively. Considering that Radeon X800 XT Platinum Editions are clocked at 520MHz (core) / 560MHz (memory), and this card technically uses the same GPU and memory, we were hoping to hit at least these clock speeds...
We slowly turned up the core and memory clock speeds on our Sapphire Radeon X800 XT sample until our test system was not longer stable. In the end we were able to hit a maximum core clock speed of 533MHz and a peak memory clock speed of 574MHz - a few ticks higher than a stock Platinum Edition. We then re-ran the high-resolution Aquamark 3 and Doom 3 tests , with AA and aniso enabled, to see just how much the increased clocks affected performance. We ended up gaining about 3 frames per second in Aquamark 3 (8%) and about 5 FPS in Doom 3 (14.2%).