Overclocking results
OverclockingSo just how far above the already-increased X800 GT 256MB frequencies were both samples able to go? Running overclocking tests by inching up core and memory speeds until visible artifacts became apparent, the air-cooled PowerColor X800 GT Xtreme 256MB sample was stable at 561MHz core and 1176MHz memory. The memory speed is a little lower than what the Samsung GDDR3 1.6ns RAM is specified to run at, so PowerColor may well be using slightly tighter timings.
The X800 GT EVO (Tide Water), thanks to the self-contained liquid-cooling unit, was stable at 580MHz core and 1170MHz memory. We re-ran Far Cry and DOOM 3, both at 1280x1024 4x AA 8x AF, to see what kind of performance benefit overclocking the cards gave.
Overclocking both cards gave a reasonable increase in performance, as you can see. However, it must be noted that neither overclocked sample was as fast as a regular Radeon X800 GTO 256MB card.
