vickybat
I am the night...I am...
Again, Vicky a misleading information... The performance is hit is not on AMD graphics card, they simply ignore the physX code and it is getting processed by CPU, resulting the crippled performance, it is not because of AMD's card.
And with every setting high, I think a person should at least target 30FPS, because 20 fps is not at all any playable rate.
Again you are starting an AMD-nVidia war, so lets not fight which is better. What I'm trying to say is that if you want PhysX then it is better to have a dedicated physX card..it does not matter what your main card is...AMD ATI or nVidia.
GTX 560 as main Card + 9800 GTS+ as PhysX card or HD 6870+ 9800GTS+ will offer you very good frame rate with everything set to high+PhysX on in 1080P resolution. always better that a single GTX 560.
Hey man calm down, i am not starting any war. I know amd cards ignore physx code very well and its processed by cpu.
But the point is performance hit is not that significant in nvidia's case as its with amd which is obvious. Let me give an example.
30 fps is not possible in metro 2033 for gtx 560 and 6950 at full hd at maximum aa, tess on, dx 11 very high and physx off. They both give 25 fps . Check HERE. Now enabling physx here, we will see a drop in both cards. The 560 will drop at best 5 fps thus giving 20fps. But 6950 will give around 5-10fps. Here i don't know the exact figures but a calculation from my end by seeing the crippling of my amd card and my friend's gtx 460. His frame don't drop below 5 with physx on in metro and he has to tone down the settings to get good framerates.
Now you know the reason why. Nvidia cards has the ability to process their proprietary code and will still be able to run the game at playable framerates. If we want better than 20fps in metro, then we can turn the settings to high from very high and it will give over 40fps with physx on. And its obvious that 6950 will be crippled. Its just a small scenario.
Now i completely agree with you that adding a second dedicated nvidia card will work wonders but more so in amd's case. As with nvidia, we just gain the lost framerates which is not that sigificant but more significant in amd's case. It will provide the lost framerates with physx on and won't give any additional rendering performance and at a cost of extra power and heat levels.
But if the primary card is nvidia, i don't recommend a physx only card as it will have extra power requirements and heat with not that much significant increment in performance. A person can always sli later and that setup will be more than capable of handling performance along with physx and the results will be significant at ultra high settings and fullhd.
So in a nutshell, a physx card will prove more valuable to a powerful amd card which gets crippled with physx on. But anything over gtx 560 can easily handle physx imo. Sure there will be a performance hit but not that significant that will render the game unplayable.
Cilus bro, throw your expert suggestion on my comment and correct me if i am wrong buddy.
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