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Inadequate Power Supply for MSI GTX 770?

Tags:
  • Gtx
  • Power Supplies
  • MSI
  • Graphics
Last response: in Graphics & Displays
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January 14, 2014 3:30:19 AM

HI.. I recently installed a new MSI GTX 770 and am not sure if my Corsair VS650 PSU is giving it enough power?

The packaging on the MSI (minimum requirements) states that, it requires one 12V rail with 42A and 2 x 8 pin PCI E "supplementary power connectors". IT also states the card requires minimum 600W power.

My PSU came with one main PCI E connector in a 6+2 pin format and an extension leading out of that also, in 6+2 pin format? I have therefore connected the main 6+2 pin connector and the extension leading out from it also, a 6+2 pin to the card thereby filling all 8 sockets. Is this ok/correct?

The packaging on the VS650 box states +12V=50A and -12V=0.3A. It shows the 'Maximum Combined Voltage' under this as 600W. Is this just barely meeting requirements or am I short? The MSI pkgng states 'minimum' one 12V with 50A rail so, does this take care of it or am I still under-powering my card?

Any feedback appreciated. Tks.

More about : inadequate power supply msi gtx 770

a b ) Power supply
January 14, 2014 3:38:46 AM

Your card is installed correctly and that PSU is able to run it.
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January 14, 2014 3:54:46 AM

Would it make a difference if I interchanged the connectors on that cable? Of the two 8 pin slots on the card is the a mother or 'parent' slot or are both equal?
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a b ) Power supply
January 14, 2014 4:01:38 AM

No difference because they are on the same circuit.
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January 14, 2014 4:04:33 AM

Another thing I read about is that, Haswell processors also use the 12V rail and about 20W so is this sufficient considering I have an i5 4430, which is also Haswell?
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a b ) Power supply
January 14, 2014 4:13:07 AM

You got 50A on your 12V rail, so it provides up to 600W. And the GTX 770 takes up to 230W on its own. That leaves 370W for everything else which is much more than enough.
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January 14, 2014 4:57:36 AM

Thank you! Set's my mind at ease now. Why do these guys state 600W+ then?
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a b ) Power supply
January 14, 2014 5:10:26 AM

Because many people use crappy or unbranded PSU's that do not provide as much power as claimed, and the need to consider some people running lots of other stuff in their PC.

A PSU is practically only as good as its 12V rail(s). For example your 650W PSU really only produces 600W on the 12V rail.
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