[PhysX TEST] GeForce GTX 480 for 3D and GT 240 for PhysX in FluidMark



NVIDIA PhysX

JeGX's rig: GTX 480 + GT 240
GTX 480 + GT 240

PhysX FluidMark - GTX 480
PhysX FluidMark 1.2.0



Galaxy has presented a prototype of a dual-GPU card with a GTX 470 for 3D and a GT 240 for PhysX. A GPU dedicated for PhysX is a good idea but the GT 240 GPU is it an interesting PhysX-GPU?

Actually, my current system has an EVGA GTX 480 and a Zotac GT 240. So let’s test it with PhysX FluidMark 1.2.0 to see the impact of a GT 240.

I did two kind of tests. The first one has the support of Multi-core PhysX disabled. That means the PhysX is processed in the same thread than the graphics rendering. The second test has the multi-core support enabled. That means the PhysX is processed in one separate thread (PhysX GPU) or in multiple separate threads (PhysX CPU).

For each kind of test, the PhysX is processed by the GTX 480, then by the GT 240 and by the CPU. I set the number of particles to 120’000 (120K) in order to have a quite heavy PhysX load.

Testbed:
- CPU: Intel quad-core X9650 @ 3GHz
- RAM: 8GB DDR3
- Windows 7 64-bit
- Graphics drivers: R257.15
- FluidMark settings: 1024×768 windowed, no AA, 3 emitters.


Multi-core PhysX DISABLED



3D: GTX480 – PhysX: GTX480
PhysX: 154 (25 SPS) – GraphX: 154 (25 FPS)

PhysX FluidMark - GTX480 score



3D: GTX480 – PhysX: GT240
PhysX: 76 (13 SPS) – GraphX: 76 (13 FPS)

PhysX FluidMark - GTX480 + GT240 score



3D: GTX480 – PhysX: CPU (Quad-core X9650 @ 3GHz)
PhysX: 8 (2 SPS) – GraphX: 8 (2 FPS)

PhysX FluidMark - GTX480 + GT240 score


Multi-core PhysX ENABLED

3D: GTX480 – PhysX: GTX480
PhysX: 175 (29 SPS) – GraphX: 175 (29 FPS)

3D: GTX480 – PhysX: GT240
PhysX: 84 (14 SPS) – GraphX: 84 (14 FPS)

3D: GTX480 – PhysX: CPU (Quad-core X9650 @ 3GHz)
PhysX: 24 (4 SPS) – GraphX: 24 (4 FPS)



As we can see, the GT 240 is able to process PhysX correctly, especially compared to the CPU. Now, depending on the heaviness of the main scene for the rendering, the GT 240 can help or not the main GPU. With this version of FluidMark, the GT 240 is not really useful because the main scene is not very heavy and the GTX 480 is a powerful GPU. I’ll try to update FluidMark with an option for enabling a heavy scene and I’m sure we’ll see the real impact of the GT 240.



Update (2010.06.02)

Multi-core PhysX ENABLED + Async mode ENABLED

3D: GTX480 – PhysX: GTX480
PhysX: 171 (28 SPS) – GraphX: 335 (55 FPS) – Global score: 196 points

3D: GTX480 – PhysX: GT240
PhysX: 81 (13 SPS) – GraphX: 522 (86 FPS) – Global score: 147 points

3D: GTX480 – PhysX: CPU (Quad-core X9650 @ 3GHz)
PhysX: 21 (3 SPS) – GraphX: 546 (90 FPS) – Global score: 100 points

Async mode allows to unlock rendering… Did you notice the rendering score when the GTX 480 is not used for PhysX?





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