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post #21 of 43
Here is some real world physics testing
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post #22 of 43
Quote:
Originally Posted by dagan View Post
Eh... Not trying to be rude, I'm curious to if the bold statement is true. I googgled and couldn't find anything about fermi being able to process physx effect 2.5x faster

Edit:
also the link you posted from techpowerup.com forum. the op states

"I am very disappointed with GTX460/465. Both VGAs are much weaker than the GTX 285 TOP in the processing of PhysX games."
That part is untrue. They performed just the same in his benches, in fact, Fermi cards are coded to render PhysX more efficiently like I said. Anyway, I said "up to" knowing it won't always.

http://elitebastards.com/index.php?o...1&limitstart=3

"In terms of PhysX, NVIDIA are quoting a 2.5x performance increase with the GeForce GTX 480 over the GeForce GTX 285, and above we can see a doubling of performance in Dark Void with PhysX enabled by way of a real-world demonstration of the performance on offer."

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post #23 of 43
Quote:
Originally Posted by Johnny Doe View Post
That part is untrue. They performed just the same in his benches, in fact, Fermi cards are coded to render PhysX more efficiently like I said. Anyway, I said "up to" knowing it won't always.

http://elitebastards.com/index.php?o...1&limitstart=3

"In terms of PhysX, NVIDIA are quoting a 2.5x performance increase with the GeForce GTX 480 over the GeForce GTX 285, and above we can see a doubling of performance in Dark Void with PhysX enabled by way of a real-world demonstration of the performance on offer."

So you are reasoning that Fermi cards are 2.5x faster at physx processing due to that slide comparing gtx 480 and gtx 285? you realize that gtx 480 has twice the Cuda/shader count and 16 more ROPs.

Sir...I'm afraid your point is invalid
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post #24 of 43
Quote:
Originally Posted by dagan View Post
you stated gt 430 is faster at physx calculation vs gtx 260. which is Not true period. Physx relies heavily on shader count and 92 shader cannot compete with 192/216

wait... I feel like feeding a troll. Hope you are full because I'm out for the night. Sleepy time for me. Good night lol
I didn't say it's faster, I said it can render PhysX faster due more effective architecture. Further, PhysX isn't all about core count. You're wrong there, an Ageia card can render PhysX faster than a 8600 GT despite it's lowly shaders. Why? Because Ageia card is

"design is more about providing each parallel thread with a large working set and more of the inter-thread communication and control found in a general purpose processor (like the CPU) As such it is very well-suited to physics calculations."

However an nVidia GPU is designed as an all purpose processor; it has higher latency and slower threads.

While this just is an example, it can be related to the better effectivity of Fermi cards over G200/G92. Percantage-by-percantage, 480 renders PhysX 2.5 times faster despite being %75 stronger. Full stop. I posted all the info, take it or leave it. What did you do? You "lol" ed then went to bed...
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post #25 of 43
Quote:
Originally Posted by Paratrooper1n0 View Post
My next build is going to consist of 2 HD 6990's (7990's if they release, and release before June of next year). And am curious. Will I be able to have an Nvidia card for PhysX with AMD GPU's? And if so, what would be a proper GPU for the 4 others?
Quote:
Originally Posted by TheBirdman74 View Post
a GTX 460 1GB. Thats all you need with those bad boys.
Quote:
Originally Posted by TheBirdman74 View Post
No I think you got it a bit off.

Rule of Thumb: The Faster Primary Graphics Card You Have The MOAR powerful / faster Physx Card you need, otherwise the Physx card will hinder your overall performance from the primary cards. there will not be the same amount of physx processing going on.

Example on my GTX460SLi setup I had a GTX260 to Run Physx. But if you are running anything in the likes of 2x 580's in SLi then you need a 460 to keep up with them. Trust me, I am speaking from Experience.

Curious. Please educate me.

The advice given to OP with 2 x 6990 (4 GPUs) + GTX460 is all he needs?

Does that apply to 2 x 590 (4 GPUs) + GTX460 too? Or would it be better for performance with something like 580?
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post #26 of 43
Quote:
Originally Posted by TheBirdman74 View Post


Does that apply to 2 x 590 (4 GPUs) + GTX460 too? Or would it be better for performance with something like 580?

GTX460 = all you need for either one of those two.


So in other words, there's no performance gains going from GTX460 to 580 as a dedicated PhysX for these configurations?

1. 2 x 6990 (4 GPUs).

2. 2 x 590 (4 GPUs).
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post #27 of 43
I wouldn't even bother.

The restricted/shared air flow, extra power consumption, hardly noticeable performance increase and lack of title support makes it simply not worth giving nvidia and their counter parts any more money.
Also unless you have 3+ PCI-E slots the physx card will pull down the bandwidth on the rest of the GPU slots.
I used a 220 with a 470 and a 480 for a while and it was pointless. Your CPU and your other 2 GPUs can do the calculations just fine.
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post #28 of 43
Quote:
Originally Posted by Maxxa View Post
I wouldn't even bother.

The restricted/shared air flow, extra power consumption, hardly noticeable performance increase and lack of title support makes it simply not worth giving nvidia and their counter parts any more money.
Also unless you have 3+ PCI-E slots the physx card will pull down the bandwidth on the rest of the GPU slots.
I used a 220 with a 470 and a 480 for a while and it was pointless. Your CPU and your other 2 GPUs can do the calculations just fine.
This. There is no point in buying a dedicated physx card. Period. If you have an extra nvidia card laying around, sure it's fun to try out, but once you do, you will find out how absolutely pointless it is.

It was fun reading you guys argue, don't get me wrong, but I'm surprised the thread made it 4 pages before somebody said what had to be on everyone's mind.

There are maybe 3 games worth playing, I can only think of 1, that have physx enabled, and even then with physx enabled it really doesn't add much to the gameplay. Oh look, there's a piece of paper moving on the ground, yey. I'm sure that was worth $100+ to see.

I've tested both a gtx470, and gt240 as a physx card just for fun, and found them to be entirely useless. The gt240 actually did slow down overall FPS, I don't care what Johnny Doe says.

OP, if you feel you must buy a physx card, at least fold on it when you're not playing physx games, that way you'll at least get some use out of it.
post #29 of 43
wow you guys are way off

Dont go over a GTX 260... totally not worth it, you will get no speciual yield over a GTX260
Even an older 8800 GTS or 9800 would be more than enough regardless of the GPU's you use.
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post #30 of 43
I'll leave this here.

I hope you enjoyed your arguing all night
That didn't lower my score. What do you know it raised it a little bit.
When i have the proper psu i'll test it right.
These pics are really old.







Edited by Bodycount - 11/1/11 at 6:28am
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