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Old January 11, 2011, 09:14 PM
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Default 8800GT for PhysX, Some Questions

Hey all,

Building a new pc at the minute, wanted to ask about using an old 8800GT I have lying around as a dedicated physx card.

1 - Is this possible, and if so, would it make much of a difference?
2 - With a dual monitor GTX 470 and an i7 870 (which I hope to OC in future), running on a 650W corsair tx psu, would the extra power draw be unwise?
3 - Can the card be disabled completely when unneeded, so as to save on wattage?

Thanks!
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Old January 11, 2011, 10:28 PM
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hey dude. the physx performance,overall,on the 470 should be better vs physx on the stand alone 8800.

in some titles you may see an increase, may. others decrease or no difference.

its possible, if it makes a difference in your game no,if you can switch off the pci-e lane and such perhaps. better unplug it.

if you had an ati card? i would say its well worth it on physx games. if you had a weaker nv card? bout the same. gtx 470 class and above? maybe not :) again, depending on title nd such.

give it a try and report back. id fold on the little 8800 while keeping mains gpu for gaming, and fold on it too when not gaming
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Old January 11, 2011, 10:36 PM
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Ah, thanks for the quick reply, goes along with what I had reservations about. Shall probably donate the 8800 to the family computer someday soon :p.
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Old January 11, 2011, 11:37 PM
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do some tests before that though, there is one title,i forgot the name of it, some dude pointed it out 'nicely' last time i posted a reply to a physx question...:)
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Old January 11, 2011, 11:58 PM
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I tried using an 8800GT 512mb as a dedicated Physx card alongside my GTX 460 768Mb overclocked and it actually scored worse in Mafia 2 & Metro 2033 benchmarks than i did with just the single GTX460 and my 3D Mark 06 score went down,To be honest if your getting anything over a GTX460 then i would not bother with the 8800GT as Physx.

Ive read in a few places that for a decent Physx card you would want something along the lines of a
GTX 260 or better.
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Old January 12, 2011, 07:44 AM
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8800GT isn't worth it. If you want a dedicated PhysX card start looking for a used 260 or 280
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Old January 12, 2011, 05:53 PM
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Quote:
Originally Posted by enaberif View Post
8800GT isn't worth it. If you want a dedicated PhysX card start looking for a used 260 or 280
I cannot recall having ever seen my 9600GSO actually hit 80% utilization while being used for physx in a game.
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Old January 15, 2011, 10:28 PM
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Physx is ROP limited the more ROPs the better on anything past G92b previous G80 models arent any good for Physx obviously, But depending on driver and software Physx can be finicky on a dedicated physx card that said it should give a performance boost in games. that actually USE hardware accelerated physics sadly thats only about 14 games of which i think only 12 actually put a card to use and only 2-3 really need Physx for the full effect of the game in terms of immersion.
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Old January 16, 2011, 03:15 PM
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Quote:
Originally Posted by _dangtx_ View Post
do some tests before that though, there is one title,i forgot the name of it, some dude pointed it out 'nicely' last time i posted a reply to a physx question...:)
That would have been me . I agree with everything you said in the post above.

I wouldn't use it for physx. Only some of the older physx games like Batman AA would you see a benefit. The 8800 GT is too weak. I would say the 9800 GTX+ or equivalent would be the minimum for a dedicated physx.

Donate it for someone else. It is still fairly decent for most titles on lower resolutions.
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Old January 16, 2011, 07:55 PM
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Batman nVidia PhysX Analysis - Testing - High End Systems

an 8800gt isnt that bad for Physx 9800gt seems to be the sweet spot with a 9800GTX / GTS 250 offering a few more fps but anything over a GTS 250 basically hits the extremely limited returns on Physx

ASUS GeForce GT 430 1GB Review

when using a mid range gpu aka GTX 460 with say a GT 430 there is still an improvement as well

EVGA GTS 450 Review (Multi-GPU Comparison) - Overclock.net - Overclocking.net

The above image is from Mafia 2 using an Overclocked GTX 470 as the primary
another user review showcasing performance scaling across different gpus when using Physx
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