PC fan wiring question

Have myself a pc fan, and I hooked it up to a spare 12v adapter I had laying around.

It powers on...but I wonder this.

The fan is rated DC12v 0.53A....and the adapter reads: +12V 1250mA.

My question is, A: is that safe...and B: am I getting the max output of the fan with this adapter?

Don't want to burn the fan out, but I want to get the max cfm out of it.

Thanks guys!

Yep, you're in the clear! Your fan is rated for 12V, and you are supplying it with 12V. You could attach it to a 20V adapter, and it would go faster (If there wasn't a regulator on the fan, which there probably isn't) but it might go TOO fast. For example, it would wear and tear much faster, be unsafe, and noisy. You're set up just right dude! Smoke some weed and relax!

yep mate,your safe,what wattage is your psu

Thanks guys! =)

Mariguana...no wattage on the adapter...here's a pic.