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is my psu enough??

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  • Power Supplies
  • Graphics Cards
  • Components
Last response: in Components
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June 19, 2013 10:20:47 PM

hi guys

im going to update to a gtx 660 and my old psu is a 450 watt psu

it can supply 25 a on the +12 volt rail

I don't overclock and I don't have any fance fans

is it enough for my system

I have a i5 3550

8 gb or ram

500 gb harddisk

and gigabyte B75mx d3h

pls do reply

thx in advance guys......

More about : psu

June 19, 2013 10:28:53 PM

Ok... Nvidia is releasing the new GTX 760 on Tuesday so I'd recommend you wait and buy that first of all. To address your power issue, I would not recommend using so little power. I'd say at least a 550 watt power supply is what you will need for a setup like that. I'd suggest getting a modular variant if possible also. Sorry about the PSU inconvenience :( 
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June 19, 2013 10:59:58 PM

For a system using a single GeForce GTX 660 (non-Ti) graphics card NVIDIA specifies a minimum of a 450 Watt or greater system power supply that has a maximum combined +12 Volt continuous current rating of 24 Amps or greater and that has at least one 6-pin PCI Express supplementary power connector.

An exception is the MSI GeForce GTX 660 HAWK 2 GB. It requires two 6-pin PCI Express supplementary power connectors.

What is the brand and model number of your 450 Watt PSU? It's the quality of the power supply that matters (i.e. some PSUs can't even deliver the power specified on their label).
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June 19, 2013 11:11:37 PM

The problem with you psu is not so much total output, but the quality of you psu. At 450 watts total it at the lowest wattage needed. The 12 rail has 25A so it can put out 300W. That's only 2/3 of the total. Good quality psu can put out 80+% of the total output in the 12V rail. There's also a good change the 450 is max not continuous output. So you'll be taking a chance with your psu powering you new gpu.














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