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Would this system run on a 450w PSU?

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Ok i was going to buy a 500w PSU at first just to make sure my system would work but i found a case that gives a 450w PSU away with purchase. This reduced my computers cast from £516 to £481. If possible i would love to do this but im not sure it my system would run on a 450w (to be honest im not sure it would run on a 500W). I used http://extreme.outer...culatorlite.jsp to get an idea of the PSU usage and it came out a 315W but im not sure if im doing it right.

This is my system

Computer Case - Galaxy Black Mid Tower Case with 450W PSU - £32.68 - http://www.ebuyer.com/product/136491

Mother board - ASRock M3A770DE - £50.80 - http://www.ebuyer.com/product/174597

CPU - AMD Athlon II X4 620 - £66.22 - http://www.ebuyer.com/product/173368

Graphics card - ATI HD 5750 1GB GDDR5 Dual DVI - £104.18 - http://www.ebuyer.com/product/177117

RAM - CORSAIR 4GB DDR3 - £80.00 - http://www.ebuyer.com/product/178943

FAN - Cooler Master Hyper 212 - £18.50 - http://www.play.com/...earchtype=genre

Hard disk - Seagate OEM 500GB Barracuda - £39.94 - http://www.ebuyer.com/product/158860

OS - Microsoft Windows 7 Home Premium - £75.05 - http://www.ebuyer.com/product/173791

(If the 450w is not engough)
PSU - ANTEC PSU BASIQ 500W A/PFC RET - £46.90 - http://www.ebuyer.com/product/114929

DVD drive - Sony AD-5240S 24x DVD±RW - £15.80 - http://www.ebuyer.com/product/170014
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As a general rule of thumb, power supplies that come with cases are junk, not reliable and often blow up soon after the build. :) Also, it probably doesn't have a PCI-E 6pin connector from the Power Supply that the 5750 requires.

I think the Antec PSU you linked to isn't much better to be honest. You really should always buy a PSU that is 80 Plus Certified meaning it provides clean and stable power to your pricey components, even under load and provides a longer life for your system. Some would argue it's the most important part of the system, it decides what gets power and how stable that power is... unstable power can mean frying a component.

I'd recommend this one from Antec: Antec Earthwatts 500watt 80+ efficiency PSU

Edited by Ferrari, 23 February 2010 - 02:27 PM.

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Neil Jones

Neil Jones

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A 450w would probably be fine if it has the right connectors. The power supply the case comes with will be, as previously stated, a cheap piece of crap that will usually take the entire system out with it when it goes bang. Also pay little attention to the wattage as well because it means realistically very little. You can buy 1000w PSUs that are totally useless, for example in certain situations.
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