I concur.
The BIOS beeps are continuous short beeps. I'd suspect power first (especially with it powering on for a few seconds the fewer components you have installed), memory seating second, and finally motherboard (to include a short, to the case, for example, bent CPU socket pins, etc.--not just a bad motherboard).
I only saw an OCZ PSU once and wasn't impressed, so I don't know its quality; do you have another PSU you could try/borrow?