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What exactly do PhysX Cards do?

post #1 of 24
Thread Starter 
I understand there are only a limited number of games that utilize PhysX. I do play one of those (Unreal Tournament 3), and was wondering just how much, if at all using a PhysX card in tandem with my 5870 would improve the gaming experience in UT3. Also, if it will improve it, how, and if it will hinder it, how?

Thanks in advance
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post #2 of 24
Generally just more debris in explosions, etc.
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post #3 of 24
This will explain everything you need/want to know about Physx
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post #4 of 24
Quote:
Originally Posted by beers View Post
Generally just more debris in explosions, etc.
It also frees the CPU do to game calculations and thus increase FPS in the few games that actually can do GPU Physx.
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post #5 of 24
Thread Starter 
Quote:
Originally Posted by Skripka View Post
It also frees the CPU do to game calculations and thus increase FPS in the few games that actually can do GPU Physx.
That's something I would like to see. When I play UT3, its locked at 60fps and I can't get above it. Would using a PhysX card help me pass that barrier? I did read a reply on another thread from someone saying that using a PhysX card would hinder their already crossfired 6870's. Is that true?
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post #6 of 24
Disable Vsync and you'll pass that barrier.
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post #7 of 24
Thread Starter 
Quote:
Originally Posted by beers View Post
Disable Vsync and you'll pass that barrier.
I think I've tried that before and it didn't work. I'll have to try it again though.

Doesn't Vsync just sync your monitor refresh rate to the game?
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post #8 of 24
Quote:
Originally Posted by Gohan_Nightwing View Post
That's something I would like to see. When I play UT3, its locked at 60fps and I can't get above it. Would using a PhysX card help me pass that barrier? I did read a reply on another thread from someone saying that using a PhysX card would hinder their already crossfired 6870's. Is that true?
That was for an 8500GT. To process PhysX you need an 8800GT / 9800GT / GT240 / GTS440 (I think?) or better. Anything less WILL lower your performance, as you'll be sitting there waiting for the PPU card to do its thing.
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post #9 of 24
Thread Starter 
Quote:
Originally Posted by pioneerisloud View Post
That was for an 8500GT. To process PhysX you need an 8800GT / 9800GT / GT240 / GTS440 (I think?) or better. Anything less WILL lower your performance, as you'll be sitting there waiting for the PPU card to do its thing.
Awesome, so when looking for a PhysX card, what are some key things I need to look for i.e. Core Clock, Shade Clock, Stream Processors, Effective Memory Clock, Memory Size, Memory Interface... Which one is more valuable than the rest when you are only going to use the card for its PhysX properties?
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Nightwing
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post #10 of 24
Quote:
Originally Posted by Gohan_Nightwing View Post
I understand there are only a limited number of games that utilize PhysX. I do play one of those (Unreal Tournament 3), and was wondering just how much, if at all using a PhysX card in tandem with my 5870 would improve the gaming experience in UT3. Also, if it will improve it, how, and if it will hinder it, how?

Thanks in advance
physx is a gimmick at best.
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