What i need to know about psu

[blight16]

I currently have a cx500m psu, what i would like to know is what specs to make sure since i am looking for a new psu to make sure it is compatible with current pc

 

[ThatVietGuy]

Any current and modern PSU you buy will likely be compatible.

List your complete build so we have a better idea.

 

[Karadjgne]

1. Exactly what gpu. The gpu in any gaming rig or intended gaming rig, is by far the largest user of power in the pc. So it's essential that any psu you get has to cover not only the basic pc, but the gpu as well.
2. Cpu. There's a considerable difference in wattage used by different cpus. Some use as little as 50w, some use as much as 220w at stock values, and this will affect psu size to some degree.
3. Overclock. Could include this under #2, but really it's separate. A good overclock can easily add 100w or more to the cpu wattage, so if the cpu is able to OC, and you plan on it, you'll need a larger psu to handle the overhead.
4. Psu quality. A good quality psu of reasonable wattage is far more important than a piece of junk with huge wattage. Don't mistake size for quality and don't succumb to the idea that 80+ ratings are all that important. I'd trust my Bronze Seasonic 520w far more than any Gold 700w. It's an efficiency certification, not a guarantee of quality.

 

[Rexper]

You can't decipher the right PSU selection with specs alone.

What retailers are you purchasing from?
What is your budget for the PSU?
What are your full system specs?
Any specific requirement? (low noise, efficiency importance, etc)

Also, for what reason are you upgrading/replacing that PSU?