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Another "Will my PSU support 2 GPUs" Thread

post #1 of 18
Thread Starter 
Hey all,

Ive got my "the one who shall not be named" 120hz capable, 1440p 27" IPS display pre-ordered and I had a horrific thought! What if I need another Radeon 7950 to push the monitor to its limit.

So my question is, with my current setup will my 620W power supply be able to push 2 x 7950's in crossfire without any problems?
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post #2 of 18
i dont think so. i think you need an 850-900W PSU for that. a 650W would certainly be pushing it
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post #3 of 18
It would work but would not allow for overclocking very much.
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post #4 of 18
You should be good. Just restrict the overclocking to moderate levels biggrin.gif
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A pleasant surprise :)
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post #5 of 18
Thread Starter 
So like, overclock with no voltage increase? I can hit 1050/1575 on my current 7950 without upping the volts.
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post #6 of 18
Honestly, the extra overclock you get from upping the voltage will hardly give you any real-world improvement in frames smile.gif
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post #7 of 18
I'd assume you would get by with 620 watts on stock voltages but if you can maybe get a 750 watt.
     
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post #8 of 18
This is the PSU calculator I use. Tends to be fairly close.

http://extreme.outervision.com/psucalculatorlite.jsp

Rebelord
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post #9 of 18
Thread Starter 
Quote:
Originally Posted by Rebelord View Post

This is the PSU calculator I use. Tends to be fairly close.
http://extreme.outervision.com/psucalculatorlite.jsp
Rebelord

Lol, too cheap to spend 1.99 and go pro, no crossfire without it!
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Reboot
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Cooler Master Quickfire Rapid Corsair AX750 Corsair C70 Artic White Logitech G9x 
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Intel Celeron Processor G530 2.4 Ghz MSI H77MA-G43 Micro ATX  XFX HD 7750 1GB 8GB Corsair Vengeance 1333mhz 
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post #10 of 18
Thread Starter 
Quote:
Originally Posted by EpicAMDGamer View Post

I'd assume you would get by with 620 watts on stock voltages but if you can maybe get a 750 watt.

I just changed to the 620, wife gonna kill me smile.gif

I have a knack for finding deals and selling my old one on ebay though...
Reboot
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CPUMotherboardGraphicsGraphics
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Optical DriveCoolingOSMonitor
LG DVD-RW Corsair H100 CPU cooler Windows 7 Pro 27" Overlord Tempest X270OC 1440P 
KeyboardPowerCaseMouse
Cooler Master Quickfire Rapid Corsair AX750 Corsair C70 Artic White Logitech G9x 
Audio
Logitech Z623 2.1 
CPUMotherboardGraphicsRAM
Intel Celeron Processor G530 2.4 Ghz MSI H77MA-G43 Micro ATX  XFX HD 7750 1GB 8GB Corsair Vengeance 1333mhz 
Hard DriveOSPowerCase
2 TB Western Digital Caviar Green Windows 7 Home Premium Antec EarthWatts 380W Green Antec New Solution NSK2480 
Other
Hauppauge HVR-2250 Tv Tuner 
  hide details  
Reply
Reboot
(17 items)
 
DVR
(9 items)
 
 
CPUMotherboardGraphicsGraphics
Intel i5-3570k ASRock Z77 Professional XFX 7970 Double Dissapation XFX 7970 Double Dissapation 
RAMHard DriveHard DriveHard Drive
G.Skill 2133 DDR3 16Gb OCZ Agility 3 120GB SSD Samsung 500GB HDD Kingston HyperX SSD 120GB 
Optical DriveCoolingOSMonitor
LG DVD-RW Corsair H100 CPU cooler Windows 7 Pro 27" Overlord Tempest X270OC 1440P 
KeyboardPowerCaseMouse
Cooler Master Quickfire Rapid Corsair AX750 Corsair C70 Artic White Logitech G9x 
Audio
Logitech Z623 2.1 
CPUMotherboardGraphicsRAM
Intel Celeron Processor G530 2.4 Ghz MSI H77MA-G43 Micro ATX  XFX HD 7750 1GB 8GB Corsair Vengeance 1333mhz 
Hard DriveOSPowerCase
2 TB Western Digital Caviar Green Windows 7 Home Premium Antec EarthWatts 380W Green Antec New Solution NSK2480 
Other
Hauppauge HVR-2250 Tv Tuner 
  hide details  
Reply
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