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Looking for a low cost, 400W PSU that won't explode.

Last response: in Components
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February 11, 2013 12:15:28 PM

Hi guys,

I just bought an old XP computer for $200 to use for indie games when I'm over at the GF's place and it currently has a crappy 300W PSU.

Anyway, with the advice of the guys here I ordered this HD 6670 GPU for it... http://www.ncix.com/products/?sku=69521
and I was thinking maybe I should get a more powerful PSU.

I don't want to put much more money into this crappy PC though.

Can anyone suggest me a 400W PSU that is super cheap (<$50CAD) but won't blow up? Do I even need a different PSU?

Thanks in advance.

Also, I'm in Canada.

I'm told (by wdmfiber) the case is a PCIe
Compaq dc5700 microtower
2 full-height PCI, 1 full-height PCI Express x1










February 11, 2013 2:22:28 PM

The E2160 is a 65w CPU, and the Radeon 6670 is a 66w GPU. Theoretically, your 300w PSU could power that combination.

However, if you are going to get an inexpensive PSU, I was going to recommend the model that you linked to. The good thing about quality PSUs however is that you can carry them over to your next build. Think of it as a capital investment and it won't sting as bad...

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February 11, 2013 3:58:47 PM



you should be fine at 300W, thats still only 50% load. The thing is a cheap 400W psu is probably going to be the same internally as the crappy 300W, just higher power rating.
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February 11, 2013 4:44:18 PM

Thank you guys! I will just stick with the current PSU in this junker system! :bounce: 
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Best solution

a c 1178 ) Power supply
February 11, 2013 6:34:42 PM

For a system using a single Radeon HD 6670 graphics card AMD specifies a minimum of a 400 Watt or greater system power supply. The power supply should also have a maximum combined +12 Volt continuous current rating of 19 Amps or greater.

Total Power Supply Wattage is NOT the crucial factor in power supply selection!!! Sufficient Total Combined Continuous Power/Current Available on the +12V Rail(s) rated at 45°C - 50°C ambient temperature, is the most critical factor.

Overclocking of the CPU and/or GPU(s) will require an additional increase to the maximum combined +12 Volt continuous current ratings, recommended above, to meet the increase in power required for the overclock. The additional amount required will depend on the magnitude of the overclock being attempted.

You may find power supplies on the market that supply more than enough Wattage to run the system. However, some of them lack Sufficient Amperage capacity on the critical +12 Volt rail, which is necessary to properly power the critical components in the system (i.e. CPU and GPUs). This is the reason why graphics card manufacturers may overstate the power supply wattage, usually by at least 50 Watts, in an attempt to take into account some of those power supplies that have the weaker +12 Volt rail(s).

The HP 404795-001 300W power supply (Lite-On PS-6301-9), with its maximum combined +12 Volt continuous current rating of 18 Amps is borderline insufficient to power your system configuration with a single Radeon HD 6670 graphics card.
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February 11, 2013 7:18:45 PM

Best answer selected by gar9.
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February 11, 2013 7:22:11 PM

ko888, I am now trading this system in for a slightly better one. I will find out what the PSU is on Wednesday. I will ask for PSU advice again for the less-dumpy system, it sounds like I might have to that CX430.
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