Regardless of rating, I wouldn't recommend it. Those are about $5-10 on eBay and they're worth a tenth the price. The last two I bought blew up in a year, and since China never puts much money into them, they don't die alone... whatever they're plugged into when the capacitors happen to burst is almost inevitably, irrecoverably toast as well...
If you're going to use anything with a molex connector on it, get a small ATX12V or SFX12V (standard PC) power supply and use that. You need to find the green wire on the ATX connector (the largest PC-side connector, it'll be 20 or 24 pins depending on the age of the supply) and short that to one of the neighboring black wires. I usually use a paperclip -- it's a logic-level wire pair, that, so anything large enough to make the jump is almost overkill in terms of required AWG size. You could literally use phone-cable wire for that one connection, if you could get it to reliably contact...