quick crossfire question on a p55

phill1978 · 25 Oct 2009 at 01:33

hi,

would a P55 board (such as the msi GD80) support 2 x full 16 lanes for cross fire ? i know it has 2 x 16 lanes but in cross fire do the 1566/P55 boards go to 1 x 16 and 1 x 8 or 2 x 8

any help appreciated, looking to crossfire a 5850 in future and want to know if a p55 board will be limited in that way wether its noticeble or not.

cheers

breadturbo · 25 Oct 2009 at 01:46

'Rather than opting for just two PCIe slots on the P55-GD80, MSI have incorporated three slots which are CrossfireX and SLI capable but when used in multi GPU format the speeds drop from the PCIe 2.0 16x standard to 8x,8x and 4x. Also worthy of note is that MSI have not opted to go with the infamous Marvel controller supporting 6G, instead, MSI have incorporated the tried and tested stack of Intel and JMicron controllers for the 9 available SATA ports.'

i think its only i7 that does all x16?

phill1978 · 25 Oct 2009 at 01:03

thanks breadturbo

would there be a noticeble drop on 2 x 5850`s ? even if both were over clocked when running only 8x 8x

i think il have to go with the gigabyte x58 board which is a shame as the P55 GD80 is a really smart and well made board

perhaps i shall wait for msi to do the same board but in x58 style

breadturbo · 25 Oct 2009 at 01:11

I doubt it tbh, aslong as youre not running anything else on it to steal lane bandwidth.

also just to check you know the X58 is socket 1366, and the P55 1156?

for two 5850 id go X58 personally

http://www.madshrimps.be/vbulletin/f22/intel-x58-vs-p55-chipset-crossfire-sli-performance-66167/

coupe69 · 25 Oct 2009 at 12:26

phill1978 said:
would there be a noticeble drop on 2 x 5850`s ? even if both were over clocked when running only 8x 8x

No is the answer to that see this article here.