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sli gtx 460's what wattage psu? - Page 2

post #11 of 24
650 will do fine, 750 if you plan on heavy overclocks with over-voltages.
I only got an 850 because of the trivial extra cost over the 750w version.
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post #12 of 24
Quote:
Originally Posted by Phaedrus2129 View Post
Incorrect.



A quality 650W will do the job. Your 710W number is from the wall. Your PSU is about 81% efficient at that load, so that's 575W from the PSU. Which is the perfect range you want to be in on a 650W.

Question do 650 psu's have 4 pci-e rails with 30amps?
post #13 of 24
A quality 650W unit will run any overclocked GTX460SLI PC fine, a 750W unit should be the best choice giving some headroom for future upgrades.
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post #14 of 24
Quote:
Originally Posted by Gwb View Post
That's 450w PER gfx card. I would recommend at least a 900w unit, at the bare minimum
Please dont post if you dont know what your talking about. 900w will run sli 580s with plenty of wattage to spare.

I've ran moderately overclocked SLI 460s with a 4ghz q9550 on a 550w. No issues. Get a 650w for a little headroom, Most psus arent very efficient running at high load or very low load, there is a sweet spot.
Edited by rmp459 - 8/15/11 at 2:35pm
    
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post #15 of 24
650w is more than enough, handles my sig rig with ease!!
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post #16 of 24
Quote:
Originally Posted by Bradford1040 View Post
Question do 650 psu's have 4 pci-e rails with 30amps?
Erase "rails" and "amps" from your mind. With a quality PSU you don't have to worry about those details at all. And yes, most quality PSUs have 4 PCIe cables, although a few (like Corsair's TX650v2) limit you to two to try to force you to buy a more expensive (and profitable) 750W.
post #17 of 24
I am planning on upgrading to SLI in a couple months. My Antec New True power 650w will handle it with ease. That and my 4Ghz OC, WC loop, 8 fans, and everything else.

EDIT: and listen to Phaedrus2129, he is the PSU (and many other things) GURU.
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post #18 of 24
Thread Starter 
Quote:
Originally Posted by liskawc View Post
just a slight not quite related comment if i may. Hardocp were doing some tests with 990fxa chip and its gigabyte and asus implementations, and it happens that asus boards got their base clk up to 300Mhz, while Gigabyte boards only to 260ish ...

here are the links
http://www.hardocp.com/article/2011/...board_review/7
http://www.hardocp.com/article/2011/...board_review/6

so as you are planning to OC you might wanna think it over (also these are the highend boards but i dont see a reason why lower end boards should perform all that different with the same specs)

p.s. sorry about the offtopic
yeah but you have to understand that none of the 990fx boards reviewed can reach their full potential without the bull dozer cpu in them. I was going to go with asus but the cheapest board to match what i'm getting in the ud3 is the sabertooth at $200 vs $149 i'm willing to sacrifice that for little bit for $50 anyhow
post #19 of 24
Thread Starter 
ok so 650w it is how about some links to a "good quality" one?! thanks
post #20 of 24
Quote:
Originally Posted by Gwb View Post
That's 450w PER gfx card. I would recommend at least a 900w unit, at the bare minimum
lol

I've been running mine overclocked for months on 550W.
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