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GT640 Physx Card?

Mr Paul said:
Why waste your money?
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^.. This.... Don't bother unless you are using PhysX for some application that requires it for modeling or simulation. For games you are wasting your time and money.


If you want better performance sell the 570 and add the money you have for the 640 too and get one better single card.
 
The only thing that will have more power than my sli 570's is a 690 as I get better results than a 680 already.

I was reading that with SLI it can cause issues with physx and it not working properly and a dedicated physx card can make a big difference in games that use physx.
 
Ahaa you have 570 SLI don't even bother doing anything then to the graphics, maybe use the spare cash you have to update other things like adding a sound card or new speakers or even a new screen. You get idea something that you can actually see or hear a benefit from or even a new keyboard/mouse.. PhysX in games is as good as it gets with what you have and more than enough power there.
 
a 640 is barely any better than a 440/450, you need a 460 class GPU or higher as a dedicated physx card, something in an x40 flavour will be more of a hinderance

as mentioned, you probably have enough spare capacity in your 570's and a dedicated physx card wouldn't make much difference

I'm running SLI and have no issues with physx working properly
 
The card should be fairly good for PhysX. Its main bottleneck is memory bandwidth, which doesn't matter at all for PhysX. It has 384 CUDA cores though which means it will be comparatively great at compute tasks (like PhysX).

I'd personally go for the evga version though, it's single slot.
 
andybird123 said:
a 640 is barely any better than a 440/450, you need a 460 class GPU or higher as a dedicated physx card, something in an x40 flavour will be more of a hinderance

as mentioned, you probably have enough spare capacity in your 570's and a dedicated physx card wouldn't make much difference

I'm running SLI and have no issues with physx working properly
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its actualy better than a 450 as

450 has - 192 Cuda Core
440 has - 96 CUDA cores
560ti has - 384 CUDA cores

the 640 has 384 CUDA cores with 900Mhz clock
 
passey89 said:
its actualy better than a 450 as

450 has - 192 Cuda Core
440 has - 96 CUDA cores
560ti has - 384 CUDA cores

the 640 has 384 CUDA cores with 900Mhz clock
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Different architectures. Just like the GTX680 has 3 times the core counts of the GTX580, but it's certainly ain't 3 times faster. The "384 cores" on the 640 is most likely only equavalent to 1/3 of the core counts on the Fermi architecture, which equal to 128 cores or may be a bit more.
 
Marine-RX179 said:
Different architectures. Just like the GTX680 has 3 times the core counts of the GTX580, but it's certainly ain't 3 times faster. The "384 cores" on the 640 is most likely only equavalent to 1/3 of the core counts on the Fermi architecture, which equal to 128 cores or may be a bit more.
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ok

well my options are

gts250
gts450
gtx550ti
gt640

due to my power supply anything else uses too much.

Which would you reckon would perform the best as a dedicated physx card?
 
640 is DDR3 550 is DDR5 get a 550 ti it will give you the best performance increase in physx; I read a lot of benchmarks to give you that information! 560 is too much and actually give less increase. you will get upto 20fps increase in physx games with a 550ti as it has faster memory speed; core speed may not be the most important thing here.
 
Having dabbled with physx cards id say its not worth it. 570 SLI is plenty to handle GFX and physx in supported games.

Personally i think a 640 would hinder performance. Have you tried using one 570 for GFX and the other for physx?
 
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