No, that's not the old one. The old one is a 360w PSU that I've had for about 4 years. The one that keeps shorting out is a new one. I'm only asking just to rule it out before I RMA it. I'll test it with the tester kit when it comes, and if it's a dud I'll send it back. If it's shown to be working then it's not the PSU, in which case I don't get why it's shorting out.
Ebuyer thinks it may be shorting out the motherboard or maybe a component is shorting it out (i.e. my new graphics card - which I have no way of testing because it requires at least 450w to power it - my old PSU is only 360w). So I thought maybe it was because I had too many components chained or something. I had the HDD, a fan and the GPU chained, and then I had the rest of the components and another fan plugged into the plugs on the other wires.
Do you think it's possible a brand new
GPU could short out my mobo, preventing the PC from booting?