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Getting second g-card for x-fire, will this psu be enough?

post #1 of 9
Thread Starter 
I built this system with x-fire in mind, and today I am getting the second g-card, but I would like to get a second opinion on whether my psu is enough for 2 x radeon 6870s?
My setup is in my sig.
I do plan to run these with an eyefinity setup if it makes a difference. Currently I have 2 monitors but will be getting the third very soon

edit - psu is CORSAIR CMPSU-750HX 750W ATX12V / EPS12V
Edited by mkohanek - 8/17/11 at 5:24am
Sprite Brain
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CPUMotherboardGraphicsRAM
AMD Phenom II X6 1090T Black Edition Thuban 3.2GHz ASUS M4A89TD PRO/USB3 AM3 AMD 890FX X-Fire'd Radeon HD 6870's 1GB 256-bit DDR5 G.SKILL Ripjaws X Series 8GB (2 x 4GB) DDR3 1600 
Hard DriveOptical DriveOSMonitor
Crucial SSD 64GB & 2 x HITACHI 2TB 7200 RPM RAID 1 ASUS 24x dvd-r & HP 24x dvd-r SATA & Lightscribe Windows 7 Pro 64 bit 2 x ASUS VH236H (3rd soon) 
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TBD CORSAIR CMPSU-750HX 750W ATX12V / EPS12V Antec Three Hundred Black Steel ATX Mid Tower TBD 
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Sprite Brain
(13 items)
 
  
CPUMotherboardGraphicsRAM
AMD Phenom II X6 1090T Black Edition Thuban 3.2GHz ASUS M4A89TD PRO/USB3 AM3 AMD 890FX X-Fire'd Radeon HD 6870's 1GB 256-bit DDR5 G.SKILL Ripjaws X Series 8GB (2 x 4GB) DDR3 1600 
Hard DriveOptical DriveOSMonitor
Crucial SSD 64GB & 2 x HITACHI 2TB 7200 RPM RAID 1 ASUS 24x dvd-r & HP 24x dvd-r SATA & Lightscribe Windows 7 Pro 64 bit 2 x ASUS VH236H (3rd soon) 
KeyboardPowerCaseMouse
TBD CORSAIR CMPSU-750HX 750W ATX12V / EPS12V Antec Three Hundred Black Steel ATX Mid Tower TBD 
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post #2 of 9
lol yes it's more than enough
    
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CPUMotherboardGraphicsRAM
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post #3 of 9
You could run this on a good 550W PSU.
post #4 of 9
Thread Starter 
Will this remain true once I finally get around to OC'ing the cpu/gpu's/ram?
I don't plan to overdo the OC'ing, just want to add some more power to it.
I asked this in the first place because I seem to remember reading somewhere on these forums that you need something like 1k watt psu if you run to graphics cards
Sprite Brain
(13 items)
 
  
CPUMotherboardGraphicsRAM
AMD Phenom II X6 1090T Black Edition Thuban 3.2GHz ASUS M4A89TD PRO/USB3 AM3 AMD 890FX X-Fire'd Radeon HD 6870's 1GB 256-bit DDR5 G.SKILL Ripjaws X Series 8GB (2 x 4GB) DDR3 1600 
Hard DriveOptical DriveOSMonitor
Crucial SSD 64GB & 2 x HITACHI 2TB 7200 RPM RAID 1 ASUS 24x dvd-r & HP 24x dvd-r SATA & Lightscribe Windows 7 Pro 64 bit 2 x ASUS VH236H (3rd soon) 
KeyboardPowerCaseMouse
TBD CORSAIR CMPSU-750HX 750W ATX12V / EPS12V Antec Three Hundred Black Steel ATX Mid Tower TBD 
  hide details  
Reply
Sprite Brain
(13 items)
 
  
CPUMotherboardGraphicsRAM
AMD Phenom II X6 1090T Black Edition Thuban 3.2GHz ASUS M4A89TD PRO/USB3 AM3 AMD 890FX X-Fire'd Radeon HD 6870's 1GB 256-bit DDR5 G.SKILL Ripjaws X Series 8GB (2 x 4GB) DDR3 1600 
Hard DriveOptical DriveOSMonitor
Crucial SSD 64GB & 2 x HITACHI 2TB 7200 RPM RAID 1 ASUS 24x dvd-r & HP 24x dvd-r SATA & Lightscribe Windows 7 Pro 64 bit 2 x ASUS VH236H (3rd soon) 
KeyboardPowerCaseMouse
TBD CORSAIR CMPSU-750HX 750W ATX12V / EPS12V Antec Three Hundred Black Steel ATX Mid Tower TBD 
  hide details  
Reply
post #5 of 9
Yes
Worse than crack.
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Worse than crack.
(14 items)
 
  
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Hard DriveHard DriveOSMonitor
Samsung 840 ssd Samsung f3 spinpoint Win8 pro X-star 2560x1440 27in 
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Microsoft x4 Sidewinder Haf 922 Razor Naga Fragmat 
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post #6 of 9
Quote:
Originally Posted by mkohanek View Post
Will this remain true once I finally get around to OC'ing the cpu/gpu's/ram?
I don't plan to overdo the OC'ing, just want to add some more power to it.
I asked this in the first place because I seem to remember reading somewhere on these forums that you need something like 1k watt psu if you run to graphics cards
That's complete hogwash

To put it simply: with your current hardware, there is no way to push your PSU past its capabilities. You have nothing to worry about.
post #7 of 9
Quote:
Originally Posted by mkohanek View Post
I seem to remember reading somewhere on these forums that you need something like 1k watt psu if you run to graphics cards
hahaha
    
CPUMotherboardGraphicsRAM
2500K Asus P8Z68-V Gigabyte GTX 480 SOC 8gb DDR3 1600 c9 Ripjaws 
Hard DriveMonitorPowerCase
Too many to list 1920 x 1200, 24" Acer Corsair 650TX Naving Benching Station 
  hide details  
Reply
    
CPUMotherboardGraphicsRAM
2500K Asus P8Z68-V Gigabyte GTX 480 SOC 8gb DDR3 1600 c9 Ripjaws 
Hard DriveMonitorPowerCase
Too many to list 1920 x 1200, 24" Acer Corsair 650TX Naving Benching Station 
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post #8 of 9
Yeah your 750W is plenty, it could run crossfired 6950's no problem.
post #9 of 9
Thread Starter 
thanks for the info.
Edited by mkohanek - 8/17/11 at 12:51pm
Sprite Brain
(13 items)
 
  
CPUMotherboardGraphicsRAM
AMD Phenom II X6 1090T Black Edition Thuban 3.2GHz ASUS M4A89TD PRO/USB3 AM3 AMD 890FX X-Fire'd Radeon HD 6870's 1GB 256-bit DDR5 G.SKILL Ripjaws X Series 8GB (2 x 4GB) DDR3 1600 
Hard DriveOptical DriveOSMonitor
Crucial SSD 64GB & 2 x HITACHI 2TB 7200 RPM RAID 1 ASUS 24x dvd-r & HP 24x dvd-r SATA & Lightscribe Windows 7 Pro 64 bit 2 x ASUS VH236H (3rd soon) 
KeyboardPowerCaseMouse
TBD CORSAIR CMPSU-750HX 750W ATX12V / EPS12V Antec Three Hundred Black Steel ATX Mid Tower TBD 
  hide details  
Reply
Sprite Brain
(13 items)
 
  
CPUMotherboardGraphicsRAM
AMD Phenom II X6 1090T Black Edition Thuban 3.2GHz ASUS M4A89TD PRO/USB3 AM3 AMD 890FX X-Fire'd Radeon HD 6870's 1GB 256-bit DDR5 G.SKILL Ripjaws X Series 8GB (2 x 4GB) DDR3 1600 
Hard DriveOptical DriveOSMonitor
Crucial SSD 64GB & 2 x HITACHI 2TB 7200 RPM RAID 1 ASUS 24x dvd-r & HP 24x dvd-r SATA & Lightscribe Windows 7 Pro 64 bit 2 x ASUS VH236H (3rd soon) 
KeyboardPowerCaseMouse
TBD CORSAIR CMPSU-750HX 750W ATX12V / EPS12V Antec Three Hundred Black Steel ATX Mid Tower TBD 
  hide details  
Reply
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