I think he's more pissed off about the fact that you act like you do know about computers.
Hey, I try my best.
I don't prance around "OH I BUILT A COMPUTER THAT MEANS I KNOW EVERYTHING LOL" :/
That'd be just downright stupid.
You'd think after maybe the second or third time in a row you would have got the picture that you don't know stuff to give any sort of advice on hardware.
If I didn't know stuff about computers, I wouldn't say anything.
Stop assuming bullstuff please.