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Advice in which power supply to use?

post #1 of 9
Thread Starter 
Hi guys,

I'm building up a system right now

Asus Maximus Hero VI
4670K
GTX770SLI

Just wondering if I'd get away with a 650W PSU for the SLI setup or if I'd need to go to a 750W? I'm only planning on buying one card to begin with but I'm going to buy the second one in a year or so when the prices drop a bit. I won't be running an optical drive and I'll be running a Samsung SSD and probably a seagate 3tb drive as well. I do also plan on overclocking if this makes a difference.
post #2 of 9
As long as you have 50 amps or so on a 12v rail...or multiple rails with at least 25amps on each rail...you will be fine. Really closer to 40amps on one or 22 on muliples would be fine, but this way you have room to OC.

Though I'd buy from a manufacturer that you see on the list of recommended PSUs. I'd recommend a Seasonic or a SuperFlower rebrand. Build quality is also important, but if you can't budget it...you have to fulfill the above or your system won't work.
Edited by Vagrant Storm - 3/27/14 at 9:26am
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4x4GB G.Skill Ripjaws bunch of 'em Blu-Ray For movies Windows 8.1 
MonitorMonitorKeyboardPower
24.4" Hans G HH251 X2 Yamakasi DS270  Blah 1000watt Super Flower 
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post #3 of 9
What can you find at what prices?

Normally i would say Cooler Master V700 or EVGA SuperNova G2 750 watts but i have gotten complaints about that so what can you find?
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Intel Core I7 6850K Gigabyte X99 Ultra Gaming Gigabyte GTX 970 G1 Gaming Kingston HyperX DDR4 Savage 3000 MHz 
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Samsung 840 Evo WD Green WD30EZRX  WD Green WD40EZRX  WD Green WD60EZRX  
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WD Red WD80EFZX 8TB  LG CH12NS30 5x Noctua NF-A14 FLX Noctua NH-D15 
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Windows 7 64 Bit Asus PG279Q Corsair Gaming Strafe RGB EVGA SuperNova G2 750 watt 
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Phanteks Enthoo Luxe Roccat Kone XTD Laser Roccat Sense Metor Sennheiser HD 598 
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CPUMotherboardGraphicsRAM
Intel Core I7 6850K Gigabyte X99 Ultra Gaming Gigabyte GTX 970 G1 Gaming Kingston HyperX DDR4 Savage 3000 MHz 
Hard DriveHard DriveHard DriveHard Drive
Samsung 840 Evo WD Green WD30EZRX  WD Green WD40EZRX  WD Green WD60EZRX  
Hard DriveOptical DriveCoolingCooling
WD Red WD80EFZX 8TB  LG CH12NS30 5x Noctua NF-A14 FLX Noctua NH-D15 
OSMonitorKeyboardPower
Windows 7 64 Bit Asus PG279Q Corsair Gaming Strafe RGB EVGA SuperNova G2 750 watt 
CaseMouseMouse PadAudio
Phanteks Enthoo Luxe Roccat Kone XTD Laser Roccat Sense Metor Sennheiser HD 598 
AudioAudioOtherOther
Onkyo TX NR646  Harman Kardon HKTS 60 CableMod E series PSU cable set CableMod LED Strips 
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post #4 of 9
Thread Starter 
I was pretty keen on the XFX 750W PRO Black edition

http://products.ncix.com/detail/xfx-pro-750w-black-edition-da-78946.htm

I've not heard much about EVGA power supplies, are they any good?

http://products.ncix.com/detail/evga-supernova-750-g2-80-69-94405.htm

I also like the Corsair PSUs but I have heard some bad things about the lower down Corsair models

http://products.ncix.com/detail/corsair-professional-hx850w-850w-atx-1a-38650-1020.htm

So it looks like what you're saying is the minimum I'd get away with is 700W? Is there a big difference between Bronze certified and Gold certified?

Thanks in advance for you help.
post #5 of 9
Quote:
Originally Posted by jamarns View Post

I was pretty keen on the XFX 750W PRO Black edition

http://products.ncix.com/detail/xfx-pro-750w-black-edition-da-78946.htm

I've not heard much about EVGA power supplies, are they any good?

http://products.ncix.com/detail/evga-supernova-750-g2-80-69-94405.htm

I also like the Corsair PSUs but I have heard some bad things about the lower down Corsair models

http://products.ncix.com/detail/corsair-professional-hx850w-850w-atx-1a-38650-1020.htm

So it looks like what you're saying is the minimum I'd get away with is 700W? Is there a big difference between Bronze certified and Gold certified?

Thanks in advance for you help.

The EVGA SuperNova G2 is the best unit there and its also the cheapest

The difference between Bronze and Gold certified is there but its not huge amounts, what it means is a Gold rated unit will waste less power then a Bronze rated unit so it will costs less in the long run
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CPUMotherboardGraphicsRAM
Intel Core I7 6850K Gigabyte X99 Ultra Gaming Gigabyte GTX 970 G1 Gaming Kingston HyperX DDR4 Savage 3000 MHz 
Hard DriveHard DriveHard DriveHard Drive
Samsung 840 Evo WD Green WD30EZRX  WD Green WD40EZRX  WD Green WD60EZRX  
Hard DriveOptical DriveCoolingCooling
WD Red WD80EFZX 8TB  LG CH12NS30 5x Noctua NF-A14 FLX Noctua NH-D15 
OSMonitorKeyboardPower
Windows 7 64 Bit Asus PG279Q Corsair Gaming Strafe RGB EVGA SuperNova G2 750 watt 
CaseMouseMouse PadAudio
Phanteks Enthoo Luxe Roccat Kone XTD Laser Roccat Sense Metor Sennheiser HD 598 
AudioAudioOtherOther
Onkyo TX NR646  Harman Kardon HKTS 60 CableMod E series PSU cable set CableMod LED Strips 
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Seravee
(24 items)
 
  
CPUMotherboardGraphicsRAM
Intel Core I7 6850K Gigabyte X99 Ultra Gaming Gigabyte GTX 970 G1 Gaming Kingston HyperX DDR4 Savage 3000 MHz 
Hard DriveHard DriveHard DriveHard Drive
Samsung 840 Evo WD Green WD30EZRX  WD Green WD40EZRX  WD Green WD60EZRX  
Hard DriveOptical DriveCoolingCooling
WD Red WD80EFZX 8TB  LG CH12NS30 5x Noctua NF-A14 FLX Noctua NH-D15 
OSMonitorKeyboardPower
Windows 7 64 Bit Asus PG279Q Corsair Gaming Strafe RGB EVGA SuperNova G2 750 watt 
CaseMouseMouse PadAudio
Phanteks Enthoo Luxe Roccat Kone XTD Laser Roccat Sense Metor Sennheiser HD 598 
AudioAudioOtherOther
Onkyo TX NR646  Harman Kardon HKTS 60 CableMod E series PSU cable set CableMod LED Strips 
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post #6 of 9
Thread Starter 
I'm not really worried about saving a small amount of power. Is there any difference to the quality of the power delivered to my components between a bronze and a gold certified?
post #7 of 9
Quote:
Originally Posted by jamarns View Post

I'm not really worried about saving a small amount of power. Is there any difference to the quality of the power delivered to my components between a bronze and a gold certified?

I wouldn't really say so...they can get light-weight efficient capacitors and voltage regulators for cheap too...in that case I'd take a beefy lower efficiency unit.

Mine is only a bronze meaning that 80% of the power it pulls from the wall is provided as 12v power to my system (and in reality it is only about 78% when I tested it), however the insides of this thing are like a tank. The PSU probably weighs about 7kg or so, even the solders and joins are massive, and the heat sink keeps it pretty close to ambient temp when under a normal load. If this PSU ever dies...I will be surprised. I will take that over a 90% efficient PSU that is lighter built any day.
My System
(16 items)
 
  
CPUMotherboardGraphicsGraphics
2600K @ 4.7GHz Asus P8P67 B3 GTX 580 EVGA Hydro Copper 2 GTX 580 EVGA  
RAMHard DriveOptical DriveOS
4x4GB G.Skill Ripjaws bunch of 'em Blu-Ray For movies Windows 8.1 
MonitorMonitorKeyboardPower
24.4" Hans G HH251 X2 Yamakasi DS270  Blah 1000watt Super Flower 
CaseMouseMouse PadAudio
Built into Desk Microsoft SideWinder X8 Comfy one... Creative Extreme Gamer 
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My System
(16 items)
 
  
CPUMotherboardGraphicsGraphics
2600K @ 4.7GHz Asus P8P67 B3 GTX 580 EVGA Hydro Copper 2 GTX 580 EVGA  
RAMHard DriveOptical DriveOS
4x4GB G.Skill Ripjaws bunch of 'em Blu-Ray For movies Windows 8.1 
MonitorMonitorKeyboardPower
24.4" Hans G HH251 X2 Yamakasi DS270  Blah 1000watt Super Flower 
CaseMouseMouse PadAudio
Built into Desk Microsoft SideWinder X8 Comfy one... Creative Extreme Gamer 
  hide details  
Reply
post #8 of 9
Quote:
Originally Posted by jamarns View Post

I'm not really worried about saving a small amount of power. Is there any difference to the quality of the power delivered to my components between a bronze and a gold certified?

Those small amounts you save are not turned into heat so thats a reason right there PSU not run as hot

That again means the fan can run slower which means less noise
Seravee
(24 items)
 
  
CPUMotherboardGraphicsRAM
Intel Core I7 6850K Gigabyte X99 Ultra Gaming Gigabyte GTX 970 G1 Gaming Kingston HyperX DDR4 Savage 3000 MHz 
Hard DriveHard DriveHard DriveHard Drive
Samsung 840 Evo WD Green WD30EZRX  WD Green WD40EZRX  WD Green WD60EZRX  
Hard DriveOptical DriveCoolingCooling
WD Red WD80EFZX 8TB  LG CH12NS30 5x Noctua NF-A14 FLX Noctua NH-D15 
OSMonitorKeyboardPower
Windows 7 64 Bit Asus PG279Q Corsair Gaming Strafe RGB EVGA SuperNova G2 750 watt 
CaseMouseMouse PadAudio
Phanteks Enthoo Luxe Roccat Kone XTD Laser Roccat Sense Metor Sennheiser HD 598 
AudioAudioOtherOther
Onkyo TX NR646  Harman Kardon HKTS 60 CableMod E series PSU cable set CableMod LED Strips 
  hide details  
Reply
Seravee
(24 items)
 
  
CPUMotherboardGraphicsRAM
Intel Core I7 6850K Gigabyte X99 Ultra Gaming Gigabyte GTX 970 G1 Gaming Kingston HyperX DDR4 Savage 3000 MHz 
Hard DriveHard DriveHard DriveHard Drive
Samsung 840 Evo WD Green WD30EZRX  WD Green WD40EZRX  WD Green WD60EZRX  
Hard DriveOptical DriveCoolingCooling
WD Red WD80EFZX 8TB  LG CH12NS30 5x Noctua NF-A14 FLX Noctua NH-D15 
OSMonitorKeyboardPower
Windows 7 64 Bit Asus PG279Q Corsair Gaming Strafe RGB EVGA SuperNova G2 750 watt 
CaseMouseMouse PadAudio
Phanteks Enthoo Luxe Roccat Kone XTD Laser Roccat Sense Metor Sennheiser HD 598 
AudioAudioOtherOther
Onkyo TX NR646  Harman Kardon HKTS 60 CableMod E series PSU cable set CableMod LED Strips 
  hide details  
Reply
post #9 of 9
Thread Starter 
Thanks for all your help guys, I think I'll go with the EVGA G2 750W unless the XFX becomes cheaper before I make my purchase as they are both currently the same price right now when you take the rebate into consideration.
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