About pci-e 2.0 8x slot

[infected_]

If i use the pci-e slot at 8x speed instead of 16x do i loose performance?

thanks,

infected_

[jarlmaster47]

yes. yes you do

[Bobnova]

Depends on the GPU.
You have a dual GPU card, so running that in an 8x slot is like running two gtx275s in 4x slots, you will lose some performance.

How much exactly is hard to say, the current top card (5870) has about the same power as yours and only looses 1-2% in a 8x slot, but i don't know how well that will translate to a different architecture.

[EarthDog]

yes. yes you dodepends....With a GTX295, I would imagine the performance loss would be about the same as the 5870 which is a mere 1-2%. So not much at all. Anything below the 5870 or dual GPU cards and you likely wont lose a thing.

[gear.h34d.2012]

Everything these guys said above, plus a little more elaboration in this (http://www.overclockers.com/forums/showthread.php?t=637043) thread.



~Cheers

[infected_]

its not for my card... its for a friend. is planning on getting another 5870 but the sys would work at 8x/8x

[jason4207]

Then your fine.

[infected_]

@ jason4027 hi there jason :attn:

thanks for all the answers ppl, im gonna tell my friend its ok for him to place the x2 5870 in the maximus 2 formula at 8x/8x.

[jarlmaster47]

hmm x16 is the best to use. If you can't run both at x16 (which is weak), then x8/x8 is fine. he WILL notice some lag.

[EarthDog]

hmm x16 is the best to use. If you can't run both at x16 (which is weak), then x8/x8 is fine. he WILL notice some lag.I would be mighty impressed if he could notice a 1-2% difference in FPS.

[jason4207]

I wonder if upping the PCIe freq to 105-110 would get rid off that small 1-2% disparity? Seems logical that it would.

[EarthDog]

I have wondered that myself...its too bad I have nothing that will saturate 8x though.