Do you have PHYSX Enabled or Disabled?

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SubZero
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I've got this GTX 295 and am wondering how useful (if at all) the PHYSX GPU Acceleration function is.

Is it better not to have it on and just allow the GPU to process game-only in either Multi-GPU or Single-GPU modes?

Thanks

undeadkingpr
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It is probably better to leave it on-If it is unneeded then it does not draw any computational power but if you need more fps then you can disable it-but with a gtx 295 that probably is not a problem

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SubZero
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Thanks :)

Razear
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I have a GTX 295 as well and I have both PhysX as well as multi-GPU mode enabled.

SubZero
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> I have a GTX 295 as well and I have both PhysX as

> well as multi-GPU mode enabled.

 

Does the PhysX feature chew up much of the video ram? Or can both GPU's work their magic efficiently even with PhysX enabled?

 

Thank you, fellow Gamer :)

undeadkingpr
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Your using just one 30' screen right? If so Ram is not a problem at all

SubZero
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Yes, single 30" screen. I'm taking memory on the GTX 295 itself, not system memory. I'm wondering how much of the resources of the two cores, say in Crysis, would be used for the game graphics and how much would be "taken away" for the PhysX side of things.

Thanks much for the reply,

SZ

undeadkingpr
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One 30 inch screen with ure resolution uses 850-900mb of graphics ram-Physx uses 50-100mb of graphics ram so If you have one gig then only rarely will physx start to cost you performance in terms of ram limitations.

Oh and this is in crysis original I assume(more demanding than warhead)

SubZero
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Thanks UDK.  Sounds good.  The eVGA GTX 295 that I have has:

 

1792 meg DDR3

602 MHz Graphics Clock

1296 MHz Processor Clock

2052 MHz Data Rate

240 Stream Processors

448 Bit Memory Interface

 

I'm not sure if PhysX takes some memory from each of the two sets of memory (for each processor) or not.

Good to hear that the overload isn't too bad, percentage of total wise.  I hope that it all playes purdy with the newer games coming out.

 

Happy Gaming!

Razear
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I play at 1920x1200 so VRAM is not a problem. I'm not sure about 2560x1600 though, but that's quite a step higher. Note that, PhysX only works for PhysX enabled games like Unreal Tournament III.

undeadkingpr
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Yes physx takes memory from both of the modules(group of) devoted to each gpu. I would not worry at all though-no game can max out a 295 with just one 30 inch.

SubZero
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Thanks again for the replies.  I appreciate it.

I think that when I'm using a single LCD, both GPU's, when active, help games like Crysis crank through the ups and downs of 3D Goodness, which is exactly what I'd hoped for.  I had not considered trying to have 1 GPU run one display and the other GPU run a second display.

It sounds like the 295 has enough memory and power to enable PhysX as well as both GPU's all at the same time.

Delusion77
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I have mine disabled cuz ATI PWNs!!  :P

undeadkingpr
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TROLL ALERT!TROLL ALERT!!!!