PowerColor Radeon X800 GT - Page 4

Written by John Chen    Tuesday, 15 November 2005 11:00
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Test Setup and Overclocking


I proceeded to use the popular ATITool utility to find my core and memory headroom.  The first step was to find the maximum core frequency alone.  Leaving the memory at default speeds, the core pumped to a beautiful 571.50MHz.  That is almost 100MHz from the default speed!  This is all with stock cooling too!  For the next step, I defaulted the core clock back to stock speeds and proceeded to find the highest memory clock.  With no heatsinks attached and no aid in cooling, the memory went from the default 490MHz to a spectacular 615MHz.  If you can recall earlier about the use of the 2.0ns memory chips, they are theoretically rated to run at 500MHz.  The memory overclock result came to be 115MHz over the theoretical limit and 125MHz over the default speed.  Quite amazing.  The reason why I overclocked the core and memory separately is because the end result of them both overclocked at the same time is not the same as combining the individual results.  After spending some time fiddling with frequencies and testing for stability in 3DMark05, the final overclock on stock cooling came out to be 570MHz/609MHz.  Very impressive.

Testing Setup and Methods:

  • AMD Athlon 64 3000+ Venice (9 x 310HTT = 2.79GHz)
  • DFI NF4 SLI Infinity
  • 2 x 1GB OCZ Platinum PC4000 EB (310HTT w/ 166 divider = ~254MHz 2.5-3-2-6)
  • SilverStone ST60F
  • Cooler Master Hyper 6+
  • Windows XP Pro w/ SP2 and DirectX 9.0c
  • Nvidia nForce4 AMD 6.70
  • Nvidia ForceWare 81.85
  • ATI Catalyst 5.10


  • Chronicles of Riddick: Escape from Butcher Bay (OpenGL)
  • Doom 3 (OpenGL)
  • Far Cry (DirectX)
  • Unreal Tournament 2004 (DirectX)
  • Quake 3 (OpenGL)
  • 3DMark03 (DirectX)
  • 3DMark05 (DirectX)

Video Cards Tested:

  • ATI Radeon X800XT
  • ATI Radeon X800XL
  • PowerColor Radeon X800 GT
  • Gigabyte 6600 GT