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How small of a PSU do you think I could get away with?

post #1 of 14
Thread Starter 
I'm considering dropping down to an mATX build, using the Silverstone SG09 case. So I am looking at going to one of the Silverstone Strider PSU's, with the short cable set. Right now I have a custom sleeved Corsair AX850, and it would create one hell of a mess in that mATX case. Computer specs

i7 2700k @ 4.5ghz
Reference 7970
Corsair H80
1 SSD and 1 Mechanical drive

I plan keeping my eyes open for a deal on a Asus Rampage V Gene or P8Z77-M.

So, as the title asks, how small of a PSU would be fine for a build with that in it? I know the 850w is overkill, I got that in case I decided to go with a crossfire\SLI build at any point. So I know I can shave off some power. Thanks.
post #2 of 14
I think you'd be fine with a 650w, a Corsair AX850 would take care of it no problem. If you learn how to cable manage there won't be any mess, use the back panel of your case to hide wires thumb.gif
post #3 of 14
You could go 550-650 watts without problems depens on what cards you have two of
Seravee
(27 items)
 
  
CPUMotherboardGraphicsRAM
Intel Core I7 6850K Gigabyte X99 Ultra Gaming EVGA GTX 1080 FTW2 Kingston HyperX DDR4 Savage 3000 MHz 
Hard DriveHard DriveHard DriveHard Drive
Samsung 840 Evo WD Green WD60EZRX  WD Red WD80EFZX 8TB  Seagate Ironwolf Pro 10 TB 
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LG CH12NS30 x5 Noctua NF-A14 FLX Noctua NH-D15S Windows 7 64 Bit 
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Asus PG279Q LG 49UH750V 4K LED TV Corsair Gaming Strafe RGB EVGA SuperNova G2 750 watt 
CaseMouseMouse PadAudio
Phanteks Enthoo Luxe Roccat Kone EMP Roccat Sense Metor Sennheiser HD 598 
AudioAudioAudioAudio
Onkyo TX NR646  Harman Kardon HKTS 60 Dali Opticon Vokal x2 Dali Opticon 2 
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x2 Dali Opticon 1 CableMod E series PSU cable set CableMod LED Strips 
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Seravee
(27 items)
 
  
CPUMotherboardGraphicsRAM
Intel Core I7 6850K Gigabyte X99 Ultra Gaming EVGA GTX 1080 FTW2 Kingston HyperX DDR4 Savage 3000 MHz 
Hard DriveHard DriveHard DriveHard Drive
Samsung 840 Evo WD Green WD60EZRX  WD Red WD80EFZX 8TB  Seagate Ironwolf Pro 10 TB 
Optical DriveCoolingCoolingOS
LG CH12NS30 x5 Noctua NF-A14 FLX Noctua NH-D15S Windows 7 64 Bit 
MonitorMonitorKeyboardPower
Asus PG279Q LG 49UH750V 4K LED TV Corsair Gaming Strafe RGB EVGA SuperNova G2 750 watt 
CaseMouseMouse PadAudio
Phanteks Enthoo Luxe Roccat Kone EMP Roccat Sense Metor Sennheiser HD 598 
AudioAudioAudioAudio
Onkyo TX NR646  Harman Kardon HKTS 60 Dali Opticon Vokal x2 Dali Opticon 2 
AudioOtherOther
x2 Dali Opticon 1 CableMod E series PSU cable set CableMod LED Strips 
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post #4 of 14
550w would be fine, but I'd go 600w for a bit more headroom.
post #5 of 14
Thread Starter 
Thanks for the responses.
Quote:
Originally Posted by shilka View Post

You could go 550-650 watts without problems depens on what cards you have two of

Sticking with single GPU. All that would be in the build is in the original post, aside from a few fans.
post #6 of 14
Quote:
Originally Posted by Simonzi View Post

Thanks for the responses.
Sticking with single GPU. All that would be in the build is in the original post, aside from a few fans.

I got my comp running on a 400w Corsair, not the "builder series" but when they had better vendors. No problems here and i am running a 450gts
Obelisk
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400W Corsair NZXT BETA Evo 
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Obelisk
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Hard DriveOptical DriveOSMonitor
160 GB Cav Lite-on DVD Burner Windows Vista 32bit SP2 21' Sony Trinitron 85Hrz RR 
PowerCase
400W Corsair NZXT BETA Evo 
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post #7 of 14
Quote:
Originally Posted by BigpoppaFrary View Post

I got my comp running on a 400w Corsair, not the "builder series" but when they had better vendors. No problems here and i am running a 450gts

Corsair GS?
Seravee
(27 items)
 
  
CPUMotherboardGraphicsRAM
Intel Core I7 6850K Gigabyte X99 Ultra Gaming EVGA GTX 1080 FTW2 Kingston HyperX DDR4 Savage 3000 MHz 
Hard DriveHard DriveHard DriveHard Drive
Samsung 840 Evo WD Green WD60EZRX  WD Red WD80EFZX 8TB  Seagate Ironwolf Pro 10 TB 
Optical DriveCoolingCoolingOS
LG CH12NS30 x5 Noctua NF-A14 FLX Noctua NH-D15S Windows 7 64 Bit 
MonitorMonitorKeyboardPower
Asus PG279Q LG 49UH750V 4K LED TV Corsair Gaming Strafe RGB EVGA SuperNova G2 750 watt 
CaseMouseMouse PadAudio
Phanteks Enthoo Luxe Roccat Kone EMP Roccat Sense Metor Sennheiser HD 598 
AudioAudioAudioAudio
Onkyo TX NR646  Harman Kardon HKTS 60 Dali Opticon Vokal x2 Dali Opticon 2 
AudioOtherOther
x2 Dali Opticon 1 CableMod E series PSU cable set CableMod LED Strips 
  hide details  
Reply
Seravee
(27 items)
 
  
CPUMotherboardGraphicsRAM
Intel Core I7 6850K Gigabyte X99 Ultra Gaming EVGA GTX 1080 FTW2 Kingston HyperX DDR4 Savage 3000 MHz 
Hard DriveHard DriveHard DriveHard Drive
Samsung 840 Evo WD Green WD60EZRX  WD Red WD80EFZX 8TB  Seagate Ironwolf Pro 10 TB 
Optical DriveCoolingCoolingOS
LG CH12NS30 x5 Noctua NF-A14 FLX Noctua NH-D15S Windows 7 64 Bit 
MonitorMonitorKeyboardPower
Asus PG279Q LG 49UH750V 4K LED TV Corsair Gaming Strafe RGB EVGA SuperNova G2 750 watt 
CaseMouseMouse PadAudio
Phanteks Enthoo Luxe Roccat Kone EMP Roccat Sense Metor Sennheiser HD 598 
AudioAudioAudioAudio
Onkyo TX NR646  Harman Kardon HKTS 60 Dali Opticon Vokal x2 Dali Opticon 2 
AudioOtherOther
x2 Dali Opticon 1 CableMod E series PSU cable set CableMod LED Strips 
  hide details  
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post #8 of 14
500-550 and you are good smile.gif
 
Philip J. Fry
(6 items)
 
Turanga Leela
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CPUMotherboardGraphicsRAM
i5 4690K 4.2ghz 1.15v Asus Z97I-Plus EVGA GTX1070 ACX 3.0 HyperX 16gb 1866mhz 
Hard DriveHard DriveCoolingOS
Samsung 850 Evo 250GB Western Digital Caviar Black1TB NZXT Kraken X41 Windows 7 Ultimate 
MonitorMonitorMonitorPower
ASUS VN247H-P ASUS VN247H-P ASUS VN247H-P SPI Magna Gold 750w 
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Intel Core i5 M 480 Nvidia GeForce 310M 4gb Samsung ram 640gb Samsung HM641JI 
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Windows 7 Home Premium Samsung QX410 Laptop 
Keyboard
Which one? :P 
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Philip J. Fry
(6 items)
 
Turanga Leela
(1 item)
 
CPUMotherboardGraphicsRAM
i5 4690K 4.2ghz 1.15v Asus Z97I-Plus EVGA GTX1070 ACX 3.0 HyperX 16gb 1866mhz 
Hard DriveHard DriveCoolingOS
Samsung 850 Evo 250GB Western Digital Caviar Black1TB NZXT Kraken X41 Windows 7 Ultimate 
MonitorMonitorMonitorPower
ASUS VN247H-P ASUS VN247H-P ASUS VN247H-P SPI Magna Gold 750w 
CaseMouseMouse PadAudio
Corsair Obsidian 250D Zowie EC1-A Steelseries QCK XXL Fostex TH-X00 Mahogany 
AudioAudioAudio
Fiio E10 Olympus Modmic 4.0 Beyerdynamic DT770 80ohm Removable Cable Mod 
CPUGraphicsRAMHard Drive
Intel Core i5 M 480 Nvidia GeForce 310M 4gb Samsung ram 640gb Samsung HM641JI 
OSOther
Windows 7 Home Premium Samsung QX410 Laptop 
Keyboard
Which one? :P 
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post #9 of 14
Quote:
Originally Posted by shilka View Post

Quote:
Originally Posted by BigpoppaFrary View Post

I got my comp running on a 400w Corsair, not the "builder series" but when they had better vendors. No problems here and i am running a 450gts

Corsair GS?
Probably that's referring to Nvidia GTS 450 and Corsair CX400 (the old S12II-based model). HD 7970 uses a lot more power than GTS 450 though.


As for the OP's build, I'd think about the ST55F-G, not that you really need all that much. The ST50F-P is just not that good. Its claim to fame is being a relatively-cheap fully modular unit, out in the days before OCZ ZT too.
post #10 of 14
You can get away with a 550 but id go 650 just to be on the safe side as once you overclock both the CPU and GPU you will want a bit of headroom.
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