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Old 01-25-06, 05:01 PM   #22
Medion
 
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Join Date: Dec 2005
Location: Barksdale AFB, La
Posts: 1,238
Default Re: 6800GS vs. 9800 PRO: How big an upgrade?

Quote:
CAn you explain a little bit more ?
I know the 6800 GS in AGP is not the same as the PCI-E version, but can you tell in numbers whats`s the difference ?
As stated, the default clocks are 350/1000 (AGP) and 425/1000 (PCI-E).

OC versions seem to top out at 400/1100 (AGP) and 490/1100 (PCI-E).

The difference is more than 10%. The stock clock difference is 17.4% (using 425 as a base, it's more the other way). With equal memory and pipelines, that means the speed difference should be 15%+. It's actually more than that though, closer to 25%.

Another difference is the core. The PCI-E is NV42 (which is 12-pipe native). Its supposed to be a more efficient design. The AGP version is NV40, a 16-pipe native design, with one quad disabled.

The AGP version comes out to being 25% slower than a 6800GT. Going by core/memory/pipelines, the 6800GT should be faster than the PCI-E 6800GS, but it's not. They are virtually tied.
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