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Is my power supply enough?

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  • Power Supplies
  • Graphics Cards
  • Computers
  • Components
Last response: in Components
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January 20, 2011 7:40:17 PM

Hi, I bought a new computer and was wondering if my power supply would be enough because I changed the video card on the computer. The model name for the computer is hpe-421f (HP onboard) and I changed the video card which was in the computer to a GTX-460. The current power supply I use is a Corsair 550W power supply. Thanks in advance and if you guys need to know anything else about the computer please tell me. TY.

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a b U Graphics card
January 20, 2011 7:59:38 PM

550w is sufficient, I've just looked at the specifications of the HPE-421F. But make sure you have enough amperes (peak wattage divided by 12 as that is how many amperes will be needed on the +12V rail(s)).
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a c 144 ) Power supply
a b U Graphics card
January 21, 2011 9:18:48 AM

One of my systems has an OC'd Q9550, 4 GB RAM, a GTX260 - a card with similar power requirements to yours, a Gigabyte EP45-UD3P motherboard, 3 hard drives and an optical, and a Soundblaster card all powered by a Corsair 750TX.

Running 3 instances of Prime95 to load the CPU and 3DMark06 to load the GPU, it pulls 375 watts from the wall as measured by my Kill-a-Watt meter. Figuring 80% efficiency, the system pulls 300 watts from the PSU.

So, yes, a 550VX is certainly much more than adequate. With a full system load, it will be running around 60% of capacity.
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January 21, 2011 9:35:09 AM

It's fine. If you are not running too many additional cards or hard drives then it is more than fine. Even the GTX470 just recommends a 550w PSU for a single card configuration.
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January 21, 2011 1:03:01 PM

More than enough.
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January 27, 2011 4:01:51 AM

thank you so much for your replies :) 
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January 27, 2011 4:02:18 AM

Best answer selected by cybercafe.
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