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[Graphics Cards] Issue with PSU and GTX 550 Ti

December 27, 2012 11:28:40 PM

I recently bought a GPU and after installing it turns out the PC reboots suddenly when playing videogames and I believe this problem might be because of the PSU...

This is the GPU:

It has no OCing since I have no need of it... Nothing very special or remarkable from any other 550 Ti as far I can observe...

This is the PSU:

Its a 600 watt PSU which has two 12 volt rails (+12v1-21A and +12v2-20 amps)

This is the power chart:

( I am aware there are other brands that are supposed to be better like "Thermal-Take" or "Corsair" but this is the one I have so before you start recomending me please state if this PSU is good enough. I beg you to ONLY say otherwise if you have experience with the brand, heard or read of the brand before or encountered problems with the same brand. )

A GTX 550 Ti needs a minimum of 24 amps. Both my 12 volt rails are a bit below the minimum requirement. and only one 6-Pin PCI-Express cable is connected to the GPU. Does that mean its only recieving 21A? There is a part of the power chart where it says 38A which is underneath the +12v1 and +12v2 scheme...

I don't really understand how the 12 volt split works, could somebody explain it to me?

There was a molex plug with the GPU and I am not sure if that is actually the solution... I did use it but the PC reboot anyway so then I knew it was no use.

Extra Info:

CPU: Intel i5 750 2.67Ghz
Motherboard: ASUS P7P55D PRO
RAM: Corsair 2x4Gb 1600MHz DDR3
HDD: Western Digital Caviar Green 1Tb 64Mb Cache 7200RPM

This is all the information I believe might be necessary to understand my problem...