|My usual stuff....|
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.
I'm now downgrading Thermaltake to middle of the road.
Antec has two lines of PSs - the better line has a longer warranty for the same or similar capacity - the other line is more towards middle of the road.
AMD has a list of Certified (tested and found to be good quality) PSs:
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.
Richard59's example power supply in response 55 - note that it has a 5 year warranty.
" My PSU is becoming loud so i need to buy a new one anyways."
The noise is probably coming from the PS fan's bearings. You can easily replace the fan for it, but in this case you probably need a PS with more capacity in any case.
El-cheapo power supplies tend to have a fan that has two cheap sleeve bearings, rather than better bearings - those bearings are likely to get worn much sooner as time goes by to the point that too much friction is being generated in them, and when that happens they tend to cause screeching and/or rattling noises, most likely to be heard when you first start up the computer after it has sat unused for many hours.
You can replace the fan with one of the same size that has at least two ball bearings (if you don't wait until the PS has been damaged from it overheating, becaise the fan is not spinning fast enough or not spinning at all). If you use a 3 wire case fan as a replacement, you can connect it to aany spare 3 pin fan header on the mboard and then have the option of monitoring the PS fan's rpm in the computers bios, or by using a hardware monitoring program in Windows.