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Separate power supply for PCI-E card

post #1 of 5
Thread Starter 
Can I use a separate power supply just to power the 2 6pins on a video card?
My System
(14 items)
 
  
CPUMotherboardGraphicsRAM
i5 3750k @ 4.3 MSI P67A-GD65 Sapphire 7850 OC edition 8gb  
Hard DriveCoolingOSMonitor
1gb sata hyper 212+ win 7 samsung 21' 
PowerCaseMouse
620w Antec Neo Eco NZXT Evo Tempest abyssus 
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My System
(14 items)
 
  
CPUMotherboardGraphicsRAM
i5 3750k @ 4.3 MSI P67A-GD65 Sapphire 7850 OC edition 8gb  
Hard DriveCoolingOSMonitor
1gb sata hyper 212+ win 7 samsung 21' 
PowerCaseMouse
620w Antec Neo Eco NZXT Evo Tempest abyssus 
  hide details  
Reply
post #2 of 5
Yes, but you'll need to rewire the 24-pin in order to start both PSU's
post #3 of 5
Yes, but why would you want to do that?
post #4 of 5
We used to Ghetto rig some of the big full-tower AT cases back in the day, when you needed a separate power supply to run those big full-height 5.25" SCSI drives. Now a days, I'd say get yourself a properly spec'd power supply.

Attempting to run two PSU is going to give you headaches. First headache is you may have some period of time while the PSU are starting up, or shutting down, when those PCIe cards have power applied to the supplemental connectors, or not applied. Not a good idea.

Greg
post #5 of 5
FSP Makes a nice little power supply for the optical drive bay. The downside is it cost about as much as a quality 750 watt unit. However its a nice add on for those who already have an expensive power supply and just need to get a little more power such as what is added by a 2nd or 3rd high end video card. Its also useful for powering watercooling components and fans if you have the adapters.

FSP X5 450
http://www.newegg.com/Product/Product.aspx?Item=N82E16817104054
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