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What PSU for SLI?

post #1 of 5
Thread Starter 
OK need PSU mastas help...I plan to overclock and watercool these puppies later on. Here's my GPU:

MSI N560GTX-Ti TwinFrozrII/OC 2G DDR5: $266

PSU Choices:
HX650, $163
Antec HCG620, $110
M12II 620W, $147
...any others?

A fellow OCN'er recommended getting 750-850W PSU for leeway

The thing is...my plan is to just SLI 560Ti's and after that purchase the next generation card at about that same level and SLI that, rinse, repeat,... (IOW, I prob. won't buy 570/580/590 priced cards in future generations)

since GPUs are getting more power efficient, I don't think the power requirements will increase THAT much...it also might take many years before it does increase to that point

so if I invest in 750/850W would that be a waste? Also, how many years do these quality PSUs normally last?

I'm thinking by the time that the cards I want require more than 650W, I might as well get a new PSU since this one will be hella old

or am I making sense?
    
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post #2 of 5
IMO I think a quality 650-700w should be fine for 560's in SLI.
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Intel Core i7-4790k ASUS H97I-PLUS EVGA GeForce GTX 980 Ti FTW Corsair Vengeance DDR3 1600 2 x 4GB 
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Sandisk Z400s Seagate Barracuda 1TB 7200RPM 64MB Cache Seagate Barracuda 2TB 7200 RPM 64MB Cache Windows 10 Pro 
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post #3 of 5
nvidia cards always use more electricity than amd cards

you'll be fine with a HX650
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Shhh!
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i7 2600k Asus Maximus IV Gene-Z MSI GTX1080 Gaming X Corsair XMS3 2GB x 4 
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Crucial M4 256GB Vertex 4 512GB 1 TB Black Caviar Noctua NH-D14 Achieva Shimian 27" 2560x1440 Kingwin Lazer Platinum LZP-550 550W  
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post #4 of 5
No use in starting a new thread... Do you guys think I could run 2 570's with my X-660? I know it's borderline but getting another 570 would be my cheapest upgrade path. Otherwise I'll have to get a 590 or something.
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My System
(17 items)
 
  
CPUMotherboardGraphicsRAM
i7-2600k @ 4.6ghz Gigabyte Z77X-UD5H Zotac GTX 970 w/ Heatkiller 16GB G.Skill Ares (2133) 
Hard DriveHard DriveCoolingOS
Samsung 830 256GB Samsung 840 500GB XSPC Raystorm / RX240 / UT60 / D5 W7 Home Premium 64 
MonitorKeyboardPowerCase
X-Star DP2710 1440p CM Quickfire TK (browns) Seasonic X-660 NZXT Switch 810 
MouseAudioAudio
Zowie ec1 evo Creative Soundblaster Z Sennheiser HD558 
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post #5 of 5
Quote:
Originally Posted by DBEAU View Post
No use in starting a new thread... Do you guys think I could run 2 570's with my X-660? I know it's borderline but getting another 570 would be my cheapest upgrade path. Otherwise I'll have to get a 590 or something.
Yeah, you'll be fine.

@OP, Antec TPN 650
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