I will be getting a new graphics card soon, which its requirements are 500w plus a minimum of 30amps on the 12v rail. I have 500w, however I'm not sure how many amps I have. I would be grateful if anyone could help me with this.
This is what it says on the PSU's box:
AC INPUT: 220 - 230Vac 5A 50Hz
DC OUTPUT: +3.3v +12v(1) +12v(2) -12V +5vs
MAX LOAD: 24A 15A 25A 20A 0.3A 2.5A
MAX COMBINED WATTAGE: 120W 444W 3.6W 12.5W
I don't know if that makes any sense, but thanks anyway! ;D
1st rail is rated @ 25Amps
2nd rail is rated @ 20Amps
It only has 1 12V source though and that is rated at 37A, the ratings on the label are the current trip points, similar to the breakers in your house a single large load will trip a single line(aka one of the 12 V rails), but if you have a lot of medium sized loads you can trip the main breaker, you have to keep each load below the branch breaker limit and the sum below the main breaker limit, as such his PSU only has 37A available on its 12V rail.
Very very few PSUs have multiple independent 12V sources, the corsair HX 1000 was one of the few, it was 2 500W PSUs in a box.