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Can my PSU handle a GTX 780?

post #1 of 7
Thread Starter 
Hey guys, I'm new here but I had a friend refer me to y'all to ask some questions.

I'm building my first rig and I've ordered everything except the GPU, and I'd like to go for a GTX 780 but I'm not sure my power supply can handle it.

Here are my specs: http://pcpartpicker.com/user/traceroy/saved/1oo6

PCPartPicker part list: http://pcpartpicker.com/p/11F1D
Price breakdown by merchant: http://pcpartpicker.com/p/11F1D/by_merchant/
Benchmarks: http://pcpartpicker.com/p/11F1D/benchmarks/

CPU: Intel Core i5-3570K 3.4GHz Quad-Core Processor ($224.99 @ NCIX US)
Motherboard: ASRock Z77 Extreme4 ATX LGA1155 Motherboard ($0.00 @ NCIX US)
Memory: Kingston 8GB (1 x 8GB) DDR3-1600 Memory ($60.99 @ SuperBiiz)
Storage: Samsung 840 Series 120GB 2.5" Solid State Disk ($93.99 @ Adorama)
Storage: Seagate Barracuda 2TB 3.5" 7200RPM Internal Hard Drive ($97.98 @ Outlet PC)
Video Card: EVGA GeForce GTX 780 3GB Video Card ($648.99 @ SuperBiiz)
Case: Antec Nine Hundred ATX Mid Tower Case ($99.54 @ NCIX US)
Power Supply: SeaSonic 620W 80 PLUS Bronze Certified ATX12V / EPS12V Power Supply ($88.98 @ SuperBiiz)
Operating System: Microsoft Windows 8 Full (64-bit) ($99.99 @ Newegg)
Total: $1415.44
(Prices include shipping, taxes, and discounts when available.)
(Generated by PCPartPicker 2013-05-31 16:34 EDT-0400)

As you can see, I bought a 620w PSU, and although it says on pcpartpicker that the estimated wattage is less than 450 watts, I've been reading online that the 780 needs at least a 600w power supply. I don't know how wattage works in computers so I'm not sure if all the components add up to a certain wattage or if you only need a wattage that is equal to your most power-hungry piece of equipment.
Most benchmarks that I've seen show that the 780 only ever uses 250 watts, maybe 275 at full capacity, so I'm confused as to why many retailers such as newegg say that you need 600. I would also like to make sure that the amperage is right, because I've seen that you need 48 amps per rail and my PSU only has 24a per rail.

I also want to make sure that my i5 won't bottleneck the system. I don't think it will but I just want to make sure.

Thanks for the help in advance smile.gif


EDIT: I forgot to say that I'm playing on a single 1080p monitor. I know the 780 is a bit overkill for that but I want to be future-proof for a long time to come.
Edited by Traceroy - 5/31/13 at 1:44pm
post #2 of 7
Yes it will work great. However on another note if you haven't already purchased your 3570K Ivy Bridge CPU, Haswell (the 4xxx series of Intel CPUs) is coming out in just a few days. Should be priced very similar with better performance. Haswell + Z87 mobo you would be looking at.

Check here for an idea of total power consumption near the bottom.
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post #3 of 7
Your PSU will be overkill and likely enough for SLI cards
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post #4 of 7
Thread Starter 
Quote:
Originally Posted by Dopamin3 View Post

Yes it will work great. However on another note if you haven't already purchased your 3570K Ivy Bridge CPU, Haswell (the 4xxx series of Intel CPUs) is coming out in just a few days. Should be priced very similar with better performance. Haswell + Z87 mobo you would be looking at.

Check here for an idea of total power consumption near the bottom.

Quote:
Originally Posted by appleg33k85 View Post

Your PSU will be overkill and likely enough for SLI cards

Awesome, thanks guys I appreciate it.
I already bought my i5 but I got it on sale for $195 which I thought was a pretty decent deal. I'll probably get a new cpu before anything else in a year and a half to two years so I'm not too worried about it now.
post #5 of 7
Quote:
Originally Posted by appleg33k85 View Post

Your PSU will be overkill and likely enough for SLI cards

Not for SLI 780s I wouldn't think. Those things consume a lot of power. Especially if you are overclocking the CPU and GPU(s). At stock clocks a single 780 consume 250 watts under load.
post #6 of 7
Quote:
Originally Posted by appleg33k85 View Post

Your PSU will be overkill and likely enough for SLI cards

No.

His PSU is enough for a single 780 if he's going to OC his CPU and GPU.
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post #7 of 7
Seasonic's technology is great ! You will be fine with that psu. But if i were you i would buy a bigger one like 750-850watt for future upgrades like one more gtx 780 biggrin.gif

Your decision mate smile.gif

+1 if helped thumb.gif
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