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How many watts do I need?

post #1 of 9
Thread Starter 
CPU : Intel Core i7-2600K Sandy Bridge 3.4GHz (OC to 4GHz for now)
MOBO : Asrock z68 gen3 Fatality
SSD : Crucial M4 Sata3 SSD 60GB
HD : WD Black Sata3 6pbps 1 TB
DVD : LG GH22NP20 22X IDE SecurDisk DVD +/- RW
GPU : Nvidia Geforce GTX 580 1.536GB (Will add another sli later)
PSU : ???
RAM : G-Skill Rip Jaw X CL7 2x4GB (More in future)
CASE : Cooler Master HAF X Full Tower Black
O/S : Microsoft Windows 7 professional
Cooler: Haven't decided yet. Probably a cheap one.

I might also add other stuff on like a sound card or something in the future. OK, so my question. What power supply should I get? I was advised against a cooler master. Would I need 1000w or would 850 suffice? So, corsair hx/ax 850/1000 or the antex quatro tpq 850/1000?
post #2 of 9
AX850.

'Nuff said.

Plus that will give you some headroom to OC, and if your not going to OC, then why you here..?

Lol, just kidding, goodluck with your build!
 
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post #3 of 9
post #4 of 9
any 750W with high efficiency should be ok.
    
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post #5 of 9
Quote:
Originally Posted by rheicel View Post
any 750W with high efficiency should be ok.
Efficiency mattering how? Just in case somebody reading doesn't realize: power supplies (and most things) are rated for the output they can do. Efficiency just effects the input power that's required to achieve that output power level.

A good 750W unit is fine. If you're pushing voltages on the GTX 580s and really want to stress them (read: harder than just gaming), 850W makes sense. More than that's a waste.

Corsair HX1000 is an older unit that's overpriced for what it's worth. Whatever you do, don't get that, particularly since it's a downgrade in quality from the HX850.

Where do you live and where are you buying from? It seems weird to mention the Antec TruePower Quattro units, which are good but nothing special these days, and kind of being phased out.

Check the sticky thread of recommended PSUs for some ideas.
post #6 of 9
post #7 of 9
HX850 is an overlooked great psu.
post #8 of 9
Thread Starter 
Would 850w be enough for 3 gtx580s or is that way too much to be asking for? Or like 2 gtx580s and one additional card (For example, a sound card or something).
post #9 of 9
Quote:
Originally Posted by mortl8324 View Post
Would 850w be enough for 3 gtx580s or is that way too much to be asking for? Or like 2 gtx580s and one additional card (For example, a sound card or something).
It would be fine putting three 580s on a good 850W unit, although I wouldn't overclock the cards. Make sure to get a 850W with 6 PCIe connectors (which rules out the Corsair AX850 for example).
Any card that's not a video card has a very negligible power draw, so don't worry about those.
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