View Full Version : Worth crossfire 2 x 5870 on a P55 Board ?
jamieuk23
11-13-2009, 01:42 AM
I have a P55 board, I know it doesnt support full crossfire, but would I still get good results using 2 x 5870 ?
messerchmidt
11-13-2009, 02:29 AM
its going to suffer at a 8x/8x link instead of a 16x/16x link.
if your cpu is over 4ghz, should be fine though
jamieuk23
11-13-2009, 02:34 AM
Why does the CPU speed have anything to do with it ?
Mungri
11-13-2009, 02:47 AM
Higher CPU speed is required to reduce the bottleneck on crossfire / SLI setups.
SoulsCollective
11-13-2009, 03:16 AM
A PCI-E 2.0 8x link shouldn't significantly bottleneck a 5870. I've done some limited testing with an i7 at 3.8GHz, and even at an estimated 4x link I didn't see any throttling in 3DMark06 or general gaming.
Go for it!:clap:
Even at 8xlink it blows off the competition!
texasreefer
11-13-2009, 07:13 AM
I wouldn't be that much different to a 16x/16x board, plus you are probably going to want to upgrade to Triple channel + I7 series or better and wouldn't have to change your GPU setup.
Answer from one of the top sites:
http://media.bestofmicro.com/6/0/221832/original/Crysis%202560%204xAA.png
Quote:
"The most interesting result here is the Core i7-920, which establishes an advantage most likely attributable to its twin 16-lane PCI Express 2.0 links. If you reference back to our analysis of PCI Express connectivity, you’ll see that the results map over almost perfectly, despite the fact we were running High Quality settings there. Notice also that the AMD platform isn’t getting hammered as hard here, almost certainly a result of our switch to an SSD, which doesn’t penalize AMD as severely for the performance of its storage controller. "