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HD6990 and GTX 470 on my TX850 - Page 2

post #11 of 22
Why not wait for the 590?
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post #12 of 22
Quote:
Originally Posted by rocstar96 View Post
Why not wait for the 590?
Its probably way more expensive, hotter, consumes more power?

id prefer a AMD 6990 and a 470 for physx any day.
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post #13 of 22
Yes, people tend to over rate how much power they need when decent PSUs can actually pull more than their rated wattage.

I bet most single-card gamers with i7/X6s can get away with a 450w PSUs.

130w CPU + 200w GPU = 330w. A 380w Antec Green PSU could handle that rig just fine. Shocking, I know. Most people that shop for PSUs want to shop for "peace of mind" or "future proof" when in reality, GPUs have been pretty consistent in terms of thermal power ever since they made the switch to unified shaders back in 2006. Total system draw has not changed all that much.

Here's a review the 8800-series and 7x00-series cards from Nvidia and notice that the total system draw is around 250w for the 7900 GTX rig. If you extrapolate the performance, then you actually get more performance per watt than you used to so, like I said, total system draw hasn't change that much.
Edited by BizzareRide - 3/16/11 at 5:41am
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post #14 of 22
I read on hardwaresecrets that the HX850 can actually supply up to 1000w of continuous power. :O
post #15 of 22
I wouldn't run that much wattage for more then a few seconds O_O And DAMN, the 4870x2 really had a massive appetite. It should be fine
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post #16 of 22
You'll be fine regarding power requirements, but do you really need a GTX470 for PhysX..? (Answer, you don't).

If you want it for folding as well or something then fine, but it's overly powerful for physics
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post #17 of 22
Quote:
Originally Posted by jellis142 View Post
I wouldn't run that much wattage for more then a few seconds O_O And DAMN, the 4870x2 really had a massive appetite. It should be fine
Well, the reviews said the HX850 PSU still had over 80% efficiency with good ripple and noise control even though it was 150w over specs.

Quote:
Originally Posted by Scorpii View Post
You'll be fine regarding power requirements, but do you really need a GTX470 for PhysX..? (Answer, you don't).

If you want it for folding as well or something then fine, but it's overly powerful for physics

Yeh I read on Toms that you basically get no additional benefits in PhysX from going above a GTS250/9800GTX level physX card...and the sweet spot seems to be a 9600GT to 9800GT level physX card. So the OP should get himself a $40-$50 9600GT for physX instead.


Edited by Bluescreendeath - 3/16/11 at 2:51pm
post #18 of 22
Quote:
Originally Posted by Bluescreendeath View Post
Well, the reviews said the HX850 PSU still had over 80% efficiency with good ripple and noise control even though it was 150w over specs.




Yeh I read somewhere that you basically get no additional benefits in PhysX from going above a 9600GT-9800GT level physX card. So the OP should get himself a $40-$50 9600GT for physX instead.
I read anything under a GTX 260 wouldn't make a difference, and using anything under a 9800GT would actually reduce performance.
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post #19 of 22
Quote:
Originally Posted by jellis142 View Post
I read anything under a GTX 260 wouldn't make a difference, and using anything under a 9800GT would actually reduce performance.
Sort of. Anything over a GTX260 won't make a difference.

A 9600GT is good enough mid-tier physX card.
post #20 of 22
Thread Starter 
Quote:
Originally Posted by Scorpii View Post
You'll be fine regarding power requirements, but do you really need a GTX470 for PhysX..? (Answer, you don't).

If you want it for folding as well or something then fine, but it's overly powerful for physics
main use is with folding@home. physx is like a freebie why not take advantage of it
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