Is my PSU good enough to run 2x GTX 670s in SLI?

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TheMadskater

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Mar 29, 2013
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I am hoping to add another 670 to my computer soon and i'm not to sure on if my PSU has enough watts to run it. My comp specs are:

PSU: Diablotek UL Series 775W ATX 12V PSU
Mobo: ASUS P8Z77-V LK LGA 1155
CPU: Intel Core i5-2500k Sandy Bridge 3.3GHZ
GPU: EVGA GeForce GTX 670 FTW 2GB
Memory: Corsair XMS 16GB
HDD:Seagate Barracuda 1TB

Is my PSU good to run all that and another 670 for SLI?
 
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hapkido

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It's easily enough wattage if it outputs what it says, and 60A on the 12V rail is plenty, but I've never heard of that manufacturer. I would search for some reviews on that model. It may be a quality model, but it may be a terrible one. You don't want your PC catching fire.
 
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Chairman Ray

Chairman Ray

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Jun 13, 2012
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775W is enough to run 670 in sli.



You are right about the manufacturer. Diablotek is not considered to be one of the leading brands in PSUs, and that PSU is also not 80+ certified. What this means is two things. One is that when you load the PSU to near its capacity, there's a chance that it will pop. Two is that it runs quite inefficiently, and will produce a lot of heat. Since the PSU has overload and over voltage protection, the rest of your computer will be safe from electrical damage, but you should definitely monitor your overall temperatures to make sure the PSU isn't going to fry.
 
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Deleted member 217926

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I would not risk it. Diablotek is "when is it going to explode" on the tier list.

http://www.eggxpert.com/forums/thread/323050.aspx

That specific model has not been reviewed. Lets look at some other models reviews though shall we?

http://www.hardocp.com/article/2010/12/17/diablotek_phd650_650w_power_supply_review/9#.UVUhZp3D-00

" With the PHD650, Diablotek seemingly tried to polish a turd with a turd and as such we got the expected outcome, a pile of crap."

Well that was a nice review :)

http://www.jonnyguru.com/modules.php?name=NDReviews&op=Story5&reid=187

" Here's the good news - the Diablotek RPM-1050 is a good looking power supply. The cables are nicely sleeved, the color scheme is lovely, and it comes with some good looking velcro cable ties. Here's the bad news - everything else. This unit would not do over six hundred watts at room temperature without some serious issues, including severely out of spec ripple and severely out of spec voltage numbers. The 12V secondary parts are rated at 60A combined while the power supply itself would have you believe it is capable of 78A at 12V. This unit, quite simply, is a 500 watt unit pretending to be twice as powerful as it really is with a heatpipe added purely as a gimmick. Buy something else, people."

Conclusion: Don't even trust a single GTX 670 to that so called "775w" power supply. At least not if you like it.
Replace it with a quality unit from Corsair, Seasonic, PC Power and Cooling, XFX, Silverstone, Enermax, OCZ, Antec, or a higher efficiency Rosewill unit.
 
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TheMadskater

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What PSU would you recommend that is not to expensive that could run all of this?
 
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TheMadskater

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TheMadskater

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That does seem better. My birthday is coming up soon so i thought i would treat my self to another GPU but i wanted to make sure my PSU could handle it. I would want my PSU to fail on my birthday and have to wait till i get another one. Thank you for the help!
 
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Deleted member 217926

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Glad to help! Get that Seasonic while it's on sale because it's not normally that cheap. Those same review sites that call the Diablotek a turd call the Seasonic X "perfect". It truly is one of the best on the market
 
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TheMadskater

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Ill try to get it as soon as i can
 
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navybrandt

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With any power supply, you also need to consider its age. PSU's suffer from electrolytic capacitor aging. When used heavily or over an extended period of time (1+ years) a PSU will slowly lose some of its initial wattage capacity. Subtract 20% from its initial wattage if it's over a year old and that's its new wattage capacity. In the case of a 750W power supply, it can really only put out about 600W after a while.
 
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Deleted member 217926

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That degree of deterioration is a myth in modern power supplies with solid caps.
 
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