PhysX Benchmarks for 280GTX

[bent98]

I found this article which compares PPU/CPU/FPU benchmarks with UT3 mod pack. It benches the 9800gtx and shows that at higher resolutions game preformance is impacted when handle both 3d and physx on the same card. I am curious if anyone can provide same benchmarks with the G280?

http://techgage.com/article/nvidias_...tatus_report/3

[SH64]

Hmm interesting results .. thanks for the link!!

[Ninja Prime]

This is fairly obvious, although fanboys don't like to admit it. If you use some of the GPU's power for something else, the performance in graphics suffers. You don't see this in Vantage because the Physx test doesnt do anything major with graphics, so it can just go to town with the physics calculations.

When it comes to games however, if you're using 15-20% of your GPU's power for Physx, you're going to lose 15-20% of your graphics horsepower. I suppose as long as GPUs have way more floating point performance than CPUs, and as long as physics takes a sizeable chunk of said calculations, then it makes sense to offload the calculations there rather than the CPU. Don't fool yourself into thinking its free though.

[Ninja Prime]

Originally Posted by slaWter

10 FPS decrease is not that bad, at least you don't need an additional card anymore!

10 frames of 60 frames is a ~18% loss in performance.

[ASUSEN7900GTX]

seems as a phys x card is stil the better choise this means every time a 280GTX owner plays games like GRAW 1 and 2 they loose some performace to that of some one using a separate phys X card...or am i wrong?

[Ninja Prime]

Originally Posted by ASUSEN7900GTX

seems as a phys x card is stil the better choise this means every time a 280GTX owner plays games like GRAW 1 and 2 they loose some performace to that of some one using a separate phys X card...or am i wrong?

No, thats wrong actually. Only games that support the GPU version of Physx work with GPUs, and the only game that does is Unreal Tournament 3, and even then, only three levels support it, and even then they aren't included with the game, you have to download them. Almost seems like they tried to make it hard, lol.

[harl]

Originally Posted by Ninja Prime

10 frames of 60 frames is a ~18% loss in performance.

Yes and from 31 (CPU) fps to 50 (GPU) there is a ~61% of increase ...
(at 1680x1050)

[bent98]

Keep in mind this is all based off a 9800GTX card. Ofcourse there will be a preformance hit with any card, my question still is what is the numbers with a faster card like a 280GTX. Are the pysX benchmarks acceptable a high resolutions. Also what is the impact when you have 2 or 3 cards in sli? I would assume most games will be playable except for Cysis.

With quad core processors, 1000W PSU requirements for GPU its amazing OS, video card drivers, and software developers cant optimize everything to take full advantage of all this power.

[Ninja Prime]

Originally Posted by harl

Yes and from 31 (CPU) fps to 50 (GPU) there is a ~61% of increase ...
(at 1680x1050)

Check out the one below that, once the GPU is strained the CPU version runs at the same rate.

[Ninja Prime]

Originally Posted by slaWter

So? 50 frame are still 50 frames, very playable frame rate! I don't care about % values, frame rate values are the real deal.

I don't think you get the point...

18% is a lot, for some people, 18% might be the difference between choppy and not choppy. 18% might be the difference between 4x AA and 8x AA. 18% might be the difference between running at 1600x1200 or having to lower it to 1280x1024. 18% might mean the difference between high settings and very high settings. 18% can mean a lot.

Seems like GPU Physx is horribly inefficent compared to a Physx card's chip, but thats to be expected, though I didn't think it would be that much. However, if this was done on a 9800GTX+, then the GTX 280 might only take half that hit, 9%, since it has twice the floating point power. I say might because I'm not sure if it scales like that, but it seems logical.

[spajdr]

2560x1600 isnt good resolution for single 9800GTX+ anyway, so whoever have 30" to use that resolution also mostly have money to spend it on something better then this card.

[Sowk]

2560x1600 isn't good for any single card... Not even a GTX280.

This is High End SLI territory... 8800 GTX SLI / 260 GTX SLI / 280 GTX SLI

And still not 2 X 9800GTX's because of memory bus limitations.