ati radeon HD5750 power requirements

March 26, 2011 at 20:04:20
Specs: Win7 64bit, Intel C2D/4gig
I am researching, for a friend to purchase, a Gateway 4320-45. It has a ATI Radeon HD5750 1gig video card. The specs also include AMD Phenom II X6, 8gig DDR3 memory, 1 TB Hard Drive and a 300 watt power supply. Now I looked up the power requirements for the graphics card at the AMD site and it stated that it required a 450Watt power supply. I had also read a review by a person that had purchased this same pc with the same model number and instead of the 450watt it came with a 300watt power supply. The reviewer said that the unit that he purchased came with a 300watt power supply and an ATi HD4200 IGP, so he changed the power supply to a 500watt and put a more powerfull graphics card in it. My question is the unit that I saw at Amazon came with a 300watt power supply and a ATI Radeon HD5750 1gig video card. How can that be considering the power supply requirements. Hope I explained it well enough. All replies and opinions are greatly respected and appreciated.


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March 26, 2011 at 20:07:45
Oh yes, the unit I researched could be found at The reviewer that I had read about purchased his unit at Sears. Same model number on both units.

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March 26, 2011 at 21:48:59
Video card manufacturers overstate the power supply requirements to cover their azzes. They realize that the average consumer is clueless about hardware so it's better for them to be safe than sorry with the wattage recommendation.

A power supply unit (PSU) should NOT be judged solely on wattage though. ALL the specs (wattage, amperage, efficiency, hold-up time, PFC, etc) need to be considered, along with the reliability & reputation of the manufacturer. There are decent 300W PSUs that are much better than low end 450W PSUs. Without knowing the make/model of your 300W PSU, it's impossible to make a judgement. If you want to play it safe, go ahead & upgrade the PSU, just make sure to get a good one. I don't know when this 48 hr sale expires, but here's a good deal on a 500W Corsair:

FYI, the HD 5750 is rated at 16W idle & 86W under full load. Scroll down to the specs chart:

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