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Do I need a bigger PSU?

Last response: in Graphics & Displays
September 29, 2011 8:01:52 PM

I just built a new computer with:
intel i5 2500k
8 gigs of ddr3 (2dims)
7200rpm hd
dvd burner
7 usb devices (keyboard, mouse, hdd, printer, wifi adapter, thumbdrive, card reader)

this motherboard

And this powersupply

I know I probably should have gotten a bit bigger powersupply. but now I am wondering if I can add this video card
without running into power problems. Will I be cutting it close? Will I be pushing my PSU to hard.

More about : bigger psu

September 29, 2011 8:32:25 PM

Your supply will be fine.
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a b U Graphics card
September 29, 2011 8:33:00 PM

That's fine. Your GPU shouldn't use more than around 220W under load, leaving you with 210W for everything else. It's not ideal, but it'll do.
More importantly: what the heck are you doing with almost the most powerful CPU available and a crappy graphics card? Do you need CPU power for heavy processing or something?
a b U Graphics card
September 29, 2011 8:48:21 PM

You could even add a midrange discrete graphics card and be fine.
EDIT: Ah, you listed a GPU. Yes, that one would be fine.
September 29, 2011 8:49:40 PM

Yes, that PSU is more than enough. Even an Antec 380watts can do it.
September 29, 2011 8:52:19 PM

The 2500k was a price performance leader and in my price range. I do a fair amount of video encoding and decoding and I wanted it to be somewhat future proof. At the time I thought I would just get buy with embedded graphics as I had heard the Intel 3000 hd graphics were decent. I have subsequently decided that I would like something better. The 6770 seems to pack a good punch for the price and I can use the stream processors to accelerate opencl enabled applications.

I'm quite concerned about stability. Will this card be pushing my system to the edge? If its a comfortable fit now will it give me room to upgrade in the future (add an ssd, another card maybe even)?
September 30, 2011 2:05:26 AM

I looked at the eXtreme Power Supply Calculator( and I don't know if my motherboard would qualify and a "High End - Desktop" motherboard or a "Regular - Desktop" motherboard? Also does a 7200 rpm sata drive qualify as "regular sata" or "high rpm"? Finally would the fans that came with my antec 300 case be "regular" or "high performance" fans
a b U Graphics card
September 30, 2011 2:29:12 AM

SSDs use virtually no power. Another card, on the other hand, would definitely need a more powerful PSU.
I didn't realize you weren't in this for gaming. In that case, the CPU/GPU sounds good. Now you need a better mobo. A P67 board will let you overclock the 2500K, which is a VERY good idea. You don't have to crazy with it to get a lot of free performance.
It's got all the basic goodies (USB 3, Sata III), but it won't handle SLI/Xfire, PSU or no PSU, so think about whether that's in your future.
September 30, 2011 4:24:20 AM

Best answer selected by perfect_disturbance.