Amps on my 12V rail

F

fortyways

banned
So, I don't really know much at all about power supplies. I bought one that seemed reputable when I built my box, an Antec NeoPowerHE 500W.

I was reading PSU 101 and it says not to settle for less than 18A on the 12V line. However, it also talks about a cumulative number of amps (36A on a 480W Antec TruePower with 2x12V rails and 18A).

Mine has 3 rails with 17A on each. My question is, should I add these up (17x3 > 18) or should each one be over 18? Everything I'm powering is in my sig, plus a few fans and whatever.

Thanks
 
no, you divide the wattage on to the 12v rail by 12.

Like on mine, its 700w total, but you will see 680 for the 12v rails. So 680 divided by 12 = 56a
 
Okay, so here's my label:

neopowerdg0.jpg


So 456 / 12 = 38 amps?
 
diduknowthat said:
Correct. Each rail can max out to 17 amps, but combined it can only hit 38 amps.
Click to expand...

And the combined number is the one I should look for? i.e., the PSU 101 thread says not to settle for less than 18 amps, am I in the clear on that?

I ask because I got this from Fry's and it can still technically be exchanged I think.
 
fortyways said:
And the combined number is the one I should look for? i.e., the PSU 101 thread says not to settle for less than 18 amps, am I in the clear on that?

I ask because I got this from Fry's and it can still technically be exchanged I think.
Click to expand...
Correct. The important figure is the 38A total, which is obviously more than 18A. That PSU will provide more than enough power for a system like yours, with room for a lot of upgrade potential.
 
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