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nvidia physx?

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invisik   08-27-2008 at 01:31:21 AM

hey in my current rig i have 2 gtx260 and im having trouble getting one card to render while the other graphic card to handle physics.
im on the physx properties when i go to the settings tab, geforce physx is already selected. did it pick one card random to run physics?
Thanks!

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------------------------------ intel core 2 quad q6600 @3.2ghz msi p6n diamond (X-FI Extreme sound) 6gig of OCZ+CoRSAIR oc 900mhz Nvidia gtx 260 sli @ 730/1465/1250
Lite-On Blue-ray Western Digital 7200rpm 500gb Antec 500 Earthwatt Window vista 64-bit
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dagger   08-27-2008 at 03:01:05 AM
- 0 +

invisik wrote :

hey in my current rig i have 2 gtx260 and im having trouble getting one card to render while the other graphic card to handle physics.
im on the physx properties when i go to the settings tab, geforce physx is already selected. did it pick one card random to run physics?
Thanks!



Just run normal sli with those gtx260s. You'll get much better fps than on a single gtx260 with the other for physx despite the toll physx takes.

------------------------------ Q6600@3.6ghz, GA-EX38-DS4 motherboard, 8gb 800mhz ddr2 4-3-3-12, 8800GTS(g92)@780mhz, 1TB + 1.5TB hdds, 850watt psu
 Reply to dagger
invisik   08-27-2008 at 03:26:55 AM
- 0 +

well i just wanted to see if it works i was gonna pick up a cheap 8600 and dedicate it to run physx. good or bad idea?

Message quoted 1 times
------------------------------ intel core 2 quad q6600 @3.2ghz msi p6n diamond (X-FI Extreme sound) 6gig of OCZ+CoRSAIR oc 900mhz Nvidia gtx 260 sli @ 730/1465/1250
Lite-On Blue-ray Western Digital 7200rpm 500gb Antec 500 Earthwatt Window vista 64-bit
Reply to invisik
dagger   08-27-2008 at 03:54:24 AM
- 0 +

invisik wrote :

well i just wanted to see if it works i was gonna pick up a cheap 8600 and dedicate it to run physx. good or bad idea?



It's a good idea if you already have an old 8600 that'll otherwise be wasted. This is what most people who use this setup do. If Physx is that important to you, get an Ageia card instead of a graphics card for it. The dedicated ppu tend to offload a much smaller portion of work to cpu. The difference can be as high as 80% cpu load using gpu based physx compared to 30% for ppu. Besides, it consumes less power, runs on pci and saves you a pcie slot.

Message quoted 1 times
------------------------------ Q6600@3.6ghz, GA-EX38-DS4 motherboard, 8gb 800mhz ddr2 4-3-3-12, 8800GTS(g92)@780mhz, 1TB + 1.5TB hdds, 850watt psu
 Reply to dagger
invisik   08-27-2008 at 04:18:51 AM
- 0 +

dagger wrote :

It's a good idea if you already have an old 8600 that'll otherwise be wasted. This is what most people who use this setup do. If Physx is that important to you, get an Ageia card instead of a graphics card for it. The dedicated ppu tend to offload a much smaller portion of work to cpu. The difference can be as high as 80% cpu load using gpu based physx compared to 30% for ppu. Besides, it consumes less power, runs on pci and saves you a pcie slot.




i wonder y that is? guess nvidia didnt optimize it yet.
i guess ill just run my 2 gtx260 then ill pick up another card later on when they scale better. im not worried about pcie slot. my mobo for some reason has 4pcie slots.
=]
thanks for ur help.

Message quoted 1 times
------------------------------ intel core 2 quad q6600 @3.2ghz msi p6n diamond (X-FI Extreme sound) 6gig of OCZ+CoRSAIR oc 900mhz Nvidia gtx 260 sli @ 730/1465/1250
Lite-On Blue-ray Western Digital 7200rpm 500gb Antec 500 Earthwatt Window vista 64-bit
Reply to invisik
dagger   08-27-2008 at 04:30:06 AM
- 0 +

invisik wrote :

i wonder y that is? guess nvidia didnt optimize it yet.
i guess ill just run my 2 gtx260 then ill pick up another card later on when they scale better. im not worried about pcie slot. my mobo for some reason has 4pcie slots.
=]
thanks for ur help.



It's not about optimizing. Physics processing is not inherently as multithreaded as graphics rendering. Nvidia gpus are merely juryrigged to run Physx, especially the old 8600, which was rolled out long before Nvidia planned to run Physx off gpu.

------------------------------ Q6600@3.6ghz, GA-EX38-DS4 motherboard, 8gb 800mhz ddr2 4-3-3-12, 8800GTS(g92)@780mhz, 1TB + 1.5TB hdds, 850watt psu
 Reply to dagger
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