Hardware Good Power Supply for new computer?

Fishaman P · Dec 27, 2010

I'm building this one myself, though I've never built one before.

The Newegg PSU Calculator gives me a minimum of 357 Watts for 2 Hard Drives, and 318W for just 1, which is most likely what I'll be using, but I may upgrade later.

Please recommend a good PSU on Tigerdirect that can handle the following:

Intel Core i3 540
MSI H55M-E33 Mobo
4x2GB Corsair PC10600 1333MHz DDR3 RAM
DVD-RW Burner (most likely a SuperMulti)
ATI Radeon HD 5670 (PCI-E x16)
7200RPM 500GB HDD
3-5 USB devices plugged in

Thanks in advance!

EDIT: For clarity, I'm confused as to what connectors the PSU needs to have, how many +12V rails it needs, and how much power that/those +12V rail(s) need(s).

kiafazool · Dec 27, 2010

i would recommend the - im pretty sure u might want to go with the AX850 looking at your configuration
Corsair AX750/850 (750 watts and 850 watts)
or if you want to go more then the
Corsair AX1200 (1200 watts)

but get this power supply because its modular and its awesome

wait this video, this guys is unboxing the AX750 but he also has unboxing's of the AX850 and the AX1200 on his channel

http://www.youtube.com/watch?v=PR4KeuMYm4U

Berthenk · Dec 27, 2010

Kiafazool... seriously? That's way over the required amount of watt.
The one in the attached link has 600 watt which is also seriously overkill for that system, but not as much as kiafazool's suggestion. Then again, you're easily able to add more and or better hardware with this thing without buying a better PSU. However, it's not modular.

If you want a modular one, go for the OCZ Fatal1ty Series Power Supply of 550 watt. It's the one I have at the moment.

About the rails: hardware uses different rails: the GPU and CPU use the 12V rails the most. Make sure the TDP (Thermal Design Power) of the GPU and CPU combined is less than the total amount of watts that the 12V rails can handle.

http://www.tigerdirect.com/applications/SearchTools/item-details.asp?EdpNo=6491962&Sku=O261-6322

Fishaman P · Dec 27, 2010

OK Berthenk, so how many rails do I need? 1?

EDIT: Now I'm confused. Intel's specs sheet says 73W max TDP, whereas the ATI Radeon HD 5670 is 26A. Trying to convert the watts to amps gave weird results! At max voltage, the i3 apparently uses 1/2 the amperage than at minimum voltage. HELP!

Berthenk · Dec 27, 2010

Multiple tests say that the 5670 takes at most 75 watt under full load, as shown by the review in the attached link.

Edit: some Power Supply Unit's offer multiple rails at a lower amps/watts, while others offer only one at a high amp/watts.

http://www.pcgameshardware.com/aid,...d-DirectX-11-for-less-than-100-Euros/Reviews/

Fishaman P · Dec 27, 2010

OK, but on Tigerdirect it only lists the rails in Amps, and I still need a cheap, but sufficient and reliable power supply.

EDIT: I also can't find how many pins the 5670 needs on the PSU. I heard somewhere that the i3 can be just fine with a 4-pin connector.

EDIT2: After looking around a bit, I've found conflicting info. Now can any one of you guys recommend the best $100 GPU?

Hardware Good Power Supply for new computer?

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