Microstuttering tests on ATI Radeon HD 4870 X2

[Eastcoasthandle]

You can mimic microstuttering by playing a game then record it in Fraps. Any kind of i/o activity while gaming can give the impression of microstuttering. Therefore, it's source is not bound to a video card. Other variables can come into play that can result in the stutter you see on the screen. These issues are but not limited to:
-drivers
-tight dram timing/subtiming
-unoptimzed game or a game optimized for a speciic hardware
-PCIe at x16 and x4 when dual GPUs are used
-i/o operations runnning in the background (already discussed)
-processes running in the background
-Chipset timing
-vregs of the video card getting to hot (little do people know those need active cooling)
- power play (anyone remember that problem from 3800 series)
-Vista's super prefetching the first 5 minutes (or so) when Vista starts up
-etc

Now I have to ask another question. Did Sampas use the AFR-FriendlyD3D.exe trick to make sure that the cards were scaling properly when using Grid.exe? As there is no mention of what drivers were used to conduct these tests.