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Power supply size

I am getting ready to do a rebuild/upgrade for a family member and I found out their power supply is unreliable, therefore I need some advice on how big a PSU I should install when I rebuild their system.

Here is the current hardware that is going into the system
AMD A6 Llano 3500
Gigabyte A55M-DS2
Vengeance CMZ8GX3M2A1600C8R

I will be reusing their small (160 Gb) hard drive as well as their optical drives, 1 old CD ROM and 1 DVD burner
the current one is an old HP with a Video recorder / FM tuner card that I will probably re-use as well.

I want to make sure I have enough overhead that is they decide to add in a second HDD or even a lower end video card that I will have the power to run them.

Thanks in advance for any advice all of you give me.
4 answers Last reply Best Answer
More about power supply size
  1. CORSAIR Builder Series CX430 V2 (CMPSU-430CXV2) 430W ATX12V v2.3 80 PLUS Certified Active PFC Power Supply
  2. Try this:
    http://extreme.outervision.com/psucalculatorlite.jsp
    and then pick a PSU with a "good" name for your best chance at reliability. And remember it's Amps over Watts.
  3. Best answer
    here is someone's "review" of the same set up:
    https://decryptedtech.com/index.php?option=com_k2&view=item&id=423:gigabyte-a55m-ds2-performance-review&Itemid=161&tmpl=component&print=1
    scroll down to see what their power consumption was . .pretty low. a good 400 watt will cover you.(depending what discrete card if any)
    CORSAIR Builder Series CX430 $44.99
    http://www.newegg.com/Product/Product.aspx?Item=N82E16817139026
  4. You don't have anything in there that uses a lot of power. Even in full draw I doubt such a system will use more then 150W. (unless I missed the GPU) Any quality 350-450W PSU will do fine. I'd be careful going higher then 450W as it will start to be horribly inefficient as you go higher. If a PSU is most efficient at its 50% mark then that means you need a 300W PSU. The corsair mentioned earlier is a good choice, as is the Antec 380W Green.
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