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700W PSU neccessary for basic AMD system?

Hey all, just a quick question from a custom system I'm fixing for a friend. The PSU is failing so I was in the process of replacing it, but it is a 700W unit. It definitely doesn't seem like a quality unit but I was under the impression that a system like this wouldn't need anywhere near that much power. Could anyone advice me what kind of PSU requirements I should be looking for? Thanks!

System's Hardware:

CPU: AMD Phenom II X4 955 quad core

RAM: 4.00GB Dual-Channel DDR3 @ 669MHz

MOBO: ASUSTeK Computer INC. M4A785T-M (AM3)

GPU: 1024MB NVIDIA GeForce GT 240 (EVGA)

HDD x1: 932GB Seagate 7200rpm ST1000DM003-1CH162 (SATA)

plus a wireless PCI card, DVD drive and a single case fan.
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More about 700w psu neccessary basic amd system
  1. Best answer
    Its a very basic system. Most quality PSUs start at 400-450W, and that is way more than you need currently. Obviously if you are interested in potentially upgrading the graphics card then you may need something larger. Generally speaking though, a quality 550-600W PSU will power any single GPU setup.

    A solid entry level PSU like a Corsair CX430 or XFX Core 450 would suffice. Both are 80Plus Bronze rated for efficiency and come with a 3 and 5 year warranty respectively.
  2. a 500 or 550watt pure power PSU would be more than enough..
  3. a decent 500w is more than enough. a typical setup consumes only 300-400w
  4. Thanks a lot for the replies, that sounds much more realistic.

    I'll go grab a Corsair CX430
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