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700W PSU Enough?

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Last response: in Components
August 16, 2012 5:47:17 AM

Hello, I have a 700 Watt Azza psu, it provides 50a on the single 12v rail and up to 600 watts, with i think 78% efficieny, it came with my computer, im getting a gtx 570 graphics card tommorow and was wondering if this will be enough to power the card+ my other components, i also have 1 hdd 1 ssd, around 7-10 120/140mm led fans in my case, a corsair h60 liquid cooler in push/pull, an optical disk drive, an i5 3570k overclocked to 4.5 @ 1.27-1.29 volts, 2 sticks of gskill 1600mhz ram @ 1.5v with timings of 8-8-8 -24 and an asrock z77 pro3 mobo. I looked on nvidia's website to see how much power the gtx 570 needs and it said 38a on the 12v rails and i have that but i dont know if the remaining 12a is good enough for my other things in my computer and i dont wanna strain the semi decent psu i have, if i do need a stronger psu please recommend me how many amps i need, and ill probably get a nice corsair 750/850 watt psu or something like that. thanks, i really appreciate the time you took to read this

More about : 700w psu

a b ) Power supply
August 16, 2012 9:16:31 AM

Well, IF the PSU can deliver what it promises, it's plenty for your system. You do have a lot of fans but they only draw a very small amount of power each. As for the 38A draw on the 12V rail, that includes what they're estimating a normal system would draw on that rail. Some of the system power draw goes to the other rails, by the way. You can do the math here too - 38 amps on 12V means a power draw of 38*12 = 456W, which is more than any graphics card I've heard of draws.

However, I can't seem to find any reviews for your PSU, and Azza doesn't ring a bell as a reliable PSU brand. So there's a serious risk that the unit may be promising a lot more than it can deliver.
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a c 159 ) Power supply
August 16, 2012 12:20:02 PM

I would stay away from Azza. Their units are mostly made by a reputable mfr (Superflower), but are low-quality units unless you get one of the 80+Gold/Platinum PSUs...and that PSU is not one of them. Where are you located and do you have some sites we canl look at and recommendations?
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August 16, 2012 4:34:18 PM

located in Connecticut america and yeah ive been looking at newegg a lot and thinking about getting a CMPSU-750TX by corsair but im not sure if its compatible with my z77 mobo and my ivy bridge cpu
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a c 159 ) Power supply
August 16, 2012 5:42:56 PM

You don't need that much power unless you plan on getting another GTX570 for an SLI. A system with a single GTX 570 requires a 550W PSU with at least 38A on the 12V rails and two 75W 6-pin PCIe power connectors. A system with two GTX 570s running in two-way SLI mode requires a 750W PSU with at least 53A on the 12V rails and four 6-pin PCIe power connectors. The CMPSU-750TX certainly meets your needs for one GTX 570 and with 60A on the 12V rail and four 150W 6+2-pin PCIe connectors is sufficient for an SLI of GTX 570s. It is a good quality PSU and is a great deal at $65...jsut realize that you can get a new V2 that's made by Seasonic for less than $20 more. You can get the PC Power and Cooling MKII 750W for $15 more and it has 7 years of warranty and is 80+ Silver: http://www.newegg.com/Product/Product.aspx?Item=N82E168... - The deal from your friend is ok but you get a used product with less warranty for slightly less than the cost of a new PSU.
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a c 159 ) Power supply
August 16, 2012 5:45:11 PM

I'd jump on it for $50 but $65....
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August 16, 2012 8:02:27 PM

Rugger said:
I'd jump on it for $50 but $65....


got him down to $45 and i didnt want to keep using this noname brand psu, i dont like how they used random manufactureres to build my computer but i switch out the supertalent ram for g.skill ram, zotac gtx 560 for an evga gtx 570, azza psu for a corsair psu, remove the stock heatsink and added a corsair h60 and got additional nzxt fans for kicks.

i think i made a good deal with my buddy because its half the price new and i can possibly sell this cheap psu on ebay for 25 or something or just trash it if it doesnt sell. and i may go SLI in the future and i just wanted to be sure all my computer parts are okay and wanted to get a quality psu. im pretty sure id have to upgrade my z77 mobo for SLI because i dont think my asrock z77 pro3 supports SLI, but i dont even need SLI really because my card pulls in frame rates in the high 50s to 60 with vsync on and i game on one 23 inch 1080p monitor
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August 16, 2012 8:04:42 PM

Best answer selected by fallen17754.
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a c 159 ) Power supply
August 17, 2012 1:09:59 PM

For gaming at 1080p you don't need more GPU power than the GTX570; you should be able to max settings in most any game currently on the street at thoser resolutions. If you decide o multi-monitor later, then that could change or you could simply reduce the settings a little. It sounds like you changed out most of the components onyour your pre-built machine - it may have been cheaper building your own. :D  Enjoy your 'new' PSU and happy gaming!
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