270 Watt PSU + HD Radeon 4350 = Crash? Help!

March 13, 2012 at 17:59:22
Specs: Windows 7
For a long time now, since I bought a Radeon HD 4350, my computer has been crashing. It didn't cause too many problems, and my only guess at the time was overheating. So I opened up the case and put a fan on it. Solved the problem for a while. New computer, same exact graphics card. Same problem. (The card is not old at all)

When it happens, I will be playing a game, and for a second or two, it will start lagging, my internet will disconnect (Known because Im disconnected off of Ventrilo) and then it simply restarts.

Considering buying a new power supply and a new gfx card, because my 270 watt will not do. And I know that. But is it the cause of the crash? Brand new computer, no way any viruses got on.

See More: 270 Watt PSU + HD Radeon 4350 = Crash? Help!

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March 13, 2012 at 19:27:43
"Brand new computer"

With zero specs provided. Why not?

"my 270 watt will not do"

A 270W PSU is pretty weak these days but it's hard to make a judgement call when you didn't list it's make/model & amperage specs, or any of the other system specs. The HD 4350 is NOT a gaming card though, it's a home theater card. And it uses very little power, approx 22W under full load.


Here it is compared to the HD 5670 which is lower end gaming card:


If you suspect overheating, you should be monitoring the temperatures:


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March 14, 2012 at 12:35:10
ATI Radeon™ HD 4300 Series System Requirements

■300 Watt or greater power supply (350 Watt for ATI CrossFireX™ technology in dual mode) is recommended

The specs of power supplies vary considerably
Older PSs tend to have a higher max amperage output rating at +5v, a lower rating at +12v.
Sufficient current at +12v is mostly what the video chipset on the video card requires.

You have the symptoms of a power supply that has inadequate amperage at +12v to support the needs of the video chipset on the card. The symptoms are worse when you're doing something that uses the video chipset more intensely and draws more current from the PS, such as when you're playing a game.

Your power supply must have at least the minimum capacity required to support a system with the graphics card you are using installed, or the max graphics card you might install in the future.
(Onboard video - video built into the mboard - IS NOT A CARD ! )
If that info is not in the ad for the video card, you can go to the video card maker's web site and look up the specs for the model - often under system requirements - the minimum PS wattage, and, more important, the minimum amperage the PS must supply at 12v is stated. If you don't find that, any card with the same video chipset including any letters after the model number has very similar minimum PS requirements. Some power supplies have two or more +12v ratings - in that case, add those ratings to determine the total +12v current capacity.

If you're a gamer...
In most if not all cases, the max capacity rating of the PS is an intermittent rating. It's recommended that you do not load your PS to any more that 80% of that rating if you are going to be using something that puts a constant load on it, such as playing a recent game for hours on end. In that case, you multiply the min capacity stated for the system with the particular video chipset on the card by 1.25 to find the min. capacity of the PS you should have.

If you need to get a PS with more capacity, you can usually replace it with any decent quality standard sized standard ATX PS.

Standard (PS/2) power supply size - 86mm high, 150mm wide, 140mm deep, or 3 3/8" h x 5 7/8" w x 5 1/2" d , or very close to that, though the depth can be more or less for some PSs.

Don't buy an el-cheapo (in quality) PS.
See response 3 in this:

I no longer recommend Cooler Master, AOpen, or Sparkle power supplies.

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