what psu should I get for this system?!

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francisbojczuk

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Right, here are the specs of the pc I will be building:
I5 xxxxk 4th gen. ( I will oc it)
Some sort of mobo.
2x asus 660 oc ( I will overclock it)
1x gtx 640 dedicated to physx
16gb ram... probably 1600mhz
1tb 7200rpm hdd
60gb ssd
Cosair h100i
Sharkoon tauron atx case.

So, what affordable psu should I get which will support all this jazz?
 
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killerhurtalot

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He doesn't need anything close to 750w......

http://www.anandtech.com/show/6276/nvidia-geforce-gtx-660-review-gk106-rounds-out-the-kepler-family/17

OCed GTX 660 w/ a oced i7-3960x consumes under 300w.... Even with a GT 640 as a physx card (TDP of 65w and powered only by the PCI-E slot), It won't go over 400w...

He can get a good quality 500w PSU and still have more than enough headroom for overclocking...


Seasonic 620w bronze certified for $60
http://www.newegg.com/Product/Product.aspx?Item=N82E16817151096

Seasonic 550w Gold certified for $80
http://www.newegg.com/Product/Product.aspx?Item=N82E16817151119
 
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killerhurtalot

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Even with GTX 660 SLI, you won't need more than 600w....... they pretty much all assume you have a terrible PSU that would explode if you reach anywhere near 75% of the rated output...
 
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francisbojczuk

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But will it support all THREE gpu's, and will it have enough molex thingies for adapters?
 
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killerhurtalot

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Even though their article says that their system only uses 241W under full load. with a single card. and they said that the card only uses around 114w of power.....

Basically every single article that estimates wattage assumes you have a shitty PSU that would explode if you go near the branded wattage (Because most pre-built pcs use shitty PSUs) and doesn't provide the same wattage as the labeled.... Corsair, Seasonic, etc... ALL are tested to be within 5-10 watts of their rated wattage.... (Meaning that if it's labeled 600w, it will actually be able to put out 590-600W (unlike some of the cheap off brand ones... I've had a friend whos psu only puts out 540w even though it was rated 600w lol......)

And I have no idea why people would only run their PSUs at half or 2/3rds load... it only kills the efficiency of the PSU... making you consume way more power than needed....

But even if he does GTX 660 SLI with a GTX 640 as physx card.

I would still recommend 600-650w from a reliable manfacturer/OEM...

GTX 660 has a TDP of 140W.... But never actually gets near that... (120W at most even if you put a water cooler on it and oc the hell out of it...)

Let's just use the TDP...
2x 140W for GTX 660. that's 280w.
1x 65w for GTX 640 that's 345w
1x 4xxx hanswell chip (it's more power hungry than ivy bridge) so let's just say it's 90w TDP... that's a total of 435w.

The rest of the system including fans and everything shouldn't use more than 100w of power... (unless you got a bunch of PCI cards and stuff on it and water cooling and etc... Even then that's still 535W of TDP (which the system won't go near even overclocked (overclocking still won't let you go over the TDP design of the chips...)

a good branded 600w with a strong 12v rain would be more than enough to take care of whatever the system will throw at it...
 
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killerhurtalot

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And? I got a 650w because I'm buying a GTX 670 later this year. otherwise i would have bought a 500W at most.

How did i fail to see his recommendation for dual gtx 660s??? i said in my previous post that 2x GTX 660s would consume 280w of power at max from the TDP rating (which it'll never reach or get close to)

Just cause you guys always recommend way more than what a system actually needs doesn't mean everyone should buy what they don't need (especially in this case since he's already doing SLI with another card for Physx...)

Hey. prove my post wrong. Oh wait. you can't.
 
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killerhurtalot

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Cause I didn't see the SLI on the first post. I CLEARLY in that post said it was for a single GTX 660 and a GT 640. (and referenced a SINGLE CARD GTX 660 review)

Oh wait... I guess you don't actually read posts.

Keep not being able to back yourself up ferret.
 
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killerhurtalot

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You're saying Anandtech isn't a legit review website???
How the hell am I a fanboy??? I'm not even adovacating one brand over another.... I'm just saying that all of you guys are making him pay more than he has to for a PSU that he doesn't need and won't use and will increase his power bills.

and at least i can back up what I said with simple logic and data. You guys can't even do that. you guys look at a website whos recommendations is clearly not what their own tests show (recommending a 500w psu on something that's barely pushing 300w???)
 
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killerhurtalot

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you know that they take price into heavy consideration right? back then, that was one of the best deals especially with that extra $25 mail rebate.

Oh wait. you guys keep recommending $80-100 PSUs for the same wattage lol. (hell... If that deal $30 for a 700w OCZ modular PSU was on now, I'll recommend it in a heartbeat for almost every single build even if it only uses 250-300w of power...)

They chose that PSU for the same reason i recommend the CX430/CX430M so much... $25 after rebate for a decent 430w psu... there's nothing that's even close to it right now.

another failed example from ferret.
 
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killerhurtalot

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and


now that's funny










[/quotemsg]

another example of not reading ferret. those two were recommendations for the 1st one because they're still better quality than what Corsair had and just as cheap. You try finding one that cheap and as good as a seasonic for that price.

I find it funny that you're arguing with me instead of recommending something else that's as cheap and better lol. Especially the $60 for a 620w seasonic PSU.
 
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killerhurtalot

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lol. How does it prove me wrong? you did NOTHING to prove that it cannot run on a 600w PSU. you did NOTHING to prove that it will use more than 435W under full load, you did NOTHING to prove that anything I said was false other than saying oh look. the website said recommended 700w and that's the minimum you have to get even though their own graphs show that it won't use nearly that much.


it can run perfectly fine off of a 600w psu. just because it says recommended doesn't mean its required. you're just being a sore loser just all the evidence point to the system not needing anymore more than a 600w PSU but all the recommended ones are 700w because there's so many shit PSUs out there that run way below their labeled wattage and the websites would rather cover their asses than have angry first time builders spam their forums saying it doesn't work with a cheap 600w PSU...
 
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killerhurtalot

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Yes it will.

It has 1x 6 pin and 1x 6+2 pin

Your 2x GTX 660s require a single 6 pin each and the GTX 640 does not require a extra power cable.
 
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