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Help with quad sli/crossfire system

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June 30, 2011 1:15:29 AM

ok so i am going to build a quad crossfire/sli system and i want to have 4 cards total none of that 2gpu's in one card crap just 4 cards on a motherboard that will support an amd quad core and all the pci slots going at least x8 (x16 would be nice but quad doesnt scale well anyway)

This is probably going to be a big project and my max is 1300 including monitor (i have the keyboard and mouse)





EDIT: I was just reading on physx and i am going to use 2 ASUS ENGTX560's and i want to know which card i should use for physx
June 30, 2011 5:45:01 AM

any cheap nvidia card you can find for 50$
June 30, 2011 3:26:20 PM

you can only use one card for physx. any nvidia card will work, but i think a gtx 260 will work
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June 30, 2011 5:21:22 PM

To your original post - If you do a Quad SLI system, the PhysX capabilities will just be assigned to one of the GPUs. I don't think there's a mobo that supports Quad SLI for AMD.

To your edit - I'd take 2x6950 or 2x6970 over 2x560s + PhysX card any day. There are drivers out there that will allow you to run AMD and NVidia cards (only for PhysX) if you really want, but PhysX doesn't add that much to the gaming experience or performance.

Any card from the 8800GT and up will support PhysX - a GTX 260 would be absolute overkill, because PhysX will only run at about 5% usage. Try and get an 8800/9800GT for a good price, because they'll all work fine.

EDIT: I think it's actually from the 8600GT and up.
June 30, 2011 11:46:19 PM

boiler1990 said:
To your original post - If you do a Quad SLI system, the PhysX capabilities will just be assigned to one of the GPUs. I don't think there's a mobo that supports Quad SLI for AMD.

To your edit - I'd take 2x6950 or 2x6970 over 2x560s + PhysX card any day. There are drivers out there that will allow you to run AMD and NVidia cards (only for PhysX) if you really want, but PhysX doesn't add that much to the gaming experience or performance.

Any card from the 8800GT and up will support PhysX - a GTX 260 would be absolute overkill, because PhysX will only run at about 5% usage. Try and get an 8800/9800GT for a good price, because they'll all work fine.

EDIT: I think it's actually from the 8600GT and up.

+1 to 2 6950's
July 1, 2011 5:38:37 PM

i would get the 6950 and do the 6970 bios hack but i can get 2 gtx 250's for 100 less and i have a budget so that on a $200 msi board with 8gb ram and a 9800gt for physx
July 1, 2011 7:45:12 PM

You said 1300 is the budget, right? We build $1000 PCs using i5-2500Ks and 6950s/560Tis all day here. Definitely PASS on the GTX 250s (never heard of those, then again haven't been building long), because A) you can't upgrade further without buying new GPUs, B) they're old GPUs, and C) just because you "save" money buying GTX 250s doesn't mean it's smart.

You could run a 9800GT for PhysX with a 6950 (using special drivers that are out there), but in all actuality buying a dedicated card and sacrificing a PCI-E slot for it is not worth it. I tried a 9800GT PhysX card with my 2x470s a while back, and it ran at less than 10% usage on Metro 2033 and JC2 (games designed for PhysX).
July 1, 2011 11:58:04 PM

boiler1990 said:
You said 1300 is the budget, right? We build $1000 PCs using i5-2500Ks and 6950s/560Tis all day here. Definitely PASS on the GTX 250s (never heard of those, then again haven't been building long), because A) you can't upgrade further without buying new GPUs, B) they're old GPUs, and C) just because you "save" money buying GTX 250s doesn't mean it's smart.

You could run a 9800GT for PhysX with a 6950 (using special drivers that are out there), but in all actuality buying a dedicated card and sacrificing a PCI-E slot for it is not worth it. I tried a 9800GT PhysX card with my 2x470s a while back, and it ran at less than 10% usage on Metro 2033 and JC2 (games designed for PhysX).

id say 2 560 ti's not 6950's for 1000$. 1300$ should easily get you 2 6950's
July 2, 2011 1:33:00 AM

I was just saying that we build systems with either 560Tis or 6950s (not necessarily dual GPU). The problem is that the OP needs a monitor, and it's going to suck about $150-$200 out of the budget unless he can get a solid deal somewhere.

!