300W vs 550W 8800GT HELP

Which one is better for running either a 8800GT or HD4670. *Im not buying a new PSU these two i already have* :D

Bestec Power supply 300w
+3.3V 28
+5V 30 A
+12V 19 A
-12V 0.8 A
+5VSB 2.0 A

Sumvisions 550W
+3.3 28A
+5V 34A
+12v 14A
-5V 0.5A
-12v 0.8A
5Vsb 2A

Thanks in advance:P
7 answers Last reply
More about 300w 550w 8800gt help
  1. Bestec. Of course the best would be a quality PSU such as Corsair VX450.

    For the video card I'd go with a 4770. More powerful than the 8800 and uses very little power.
  2. The Bestec might be just enough for the HD4670 but would have problems with the 8800GT.
  3. rolli59 said:
    The Bestec might be just enough for the HD4670 but would have problems with the 8800GT.


    8800GT only uses ~7A, 4670 is ~6A. I don't think 1A will matter. And of course without knowing the rest of the system specs, it's impossible to tell.
  4. theAnimal said:
    8800GT only uses ~7A, 4670 is ~6A. I don't think 1A will matter. And of course without knowing the rest of the system specs, it's impossible to tell.


    Intel Pentium D 940 3.2Ghz
    2GB 800MHZ RAM
    300GB SATA HDD
    ATI HD3650 GDDR2

    why wouldnt the powerfulller 550w be better over the bestec.
  5. Bestec made quite a few different models of their 300 watt power supply. As near as I can tell all of them were OEM version for off the shelf pc's.

    The Sumvision Power X 500 is definitely to be avoided. There's a very negative technical review over that the UK version of Computer Shopper. Here's a link to the page about the Sumvision:

    http://www.expertreviews.co.uk/labs/118103/sumvision-power-x-500w.html

    Take a look at the entire review. They tested quite a few psu's. Antec Earthwatts EA500 and Corsair HX520 were rated Number 1 and 2. The Sumvision was at the bottom of the list. It definitely cannot deliver the advertised specifications.
  6. 8800GT had recommended 22Amps on the +12volt rail, 19amps might do it but be close. OP the most important thing for modern systems is Amps on the +12 volt rail it is the one that drives your CPU, GPU and storage. For example I have somewhere a 680watt ATX psu with 16amps on the +12 volt rail, looking at the total watts you would think it was fine but it could not run a vanilla 6800 stable.
  7. The 1024MB version of the 8800GT only uses 76 watts and 6.5 amps at full load. The 512MB version of the 8800GT uses 112 watts and 9.5 amps at full load. The source of the information is a recent Toms Hardware article about video card power requirements. I checked the atomic web site also. That site shows even lower wattage.

    The 4670 uses about 57 watts and 4.7 amps at full load. The atomic web site shows a slightly higher 70 watts.

    The rest of the components in the pc won't use more than about 200 watts. The Bestec should be able to handle the system.
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