If this is a psu issue then the fix is swap the unit and test.
The 70 bucks will be a limiter.
This seems like a nice unit that should work with your machine and is in the price area.
I'll let you do the research about reviews and if it has the connectors you need.
OCZ ModXStream Pro Power Supply - 700-Watt
Processor: i5 2500k @ 3.5 Stock
Motherboard SUS|P8P67 (REV 3.0)
Heatsink: cooler master hyper 212 plus
8 GB of RAM (Past Memtest86+ 12 passes)Stock
Case:CASE CM|RC-692-KKN2 ADVANCED RT with 4 fans
Two 320 GB hard drives in raid
Nvidia 670 Factory overclocked New
old 8800gtx Stock
For about a year now I have had problems with the computer freezing and random blue screens. It didn't matter if the computer was running Windows office or prime 95.
I sent the motherboard in for repair and they updated the bios(which was already up-to-date)And reapplied the heatsinks to the board. Basically what this says to me as they found nothing wrong but had to put something down the paper to say they did something. I received my motherboard yesterday and installed everything. when I booted it up it crashed at the window screen not a blue screen. When it rebooted Nvidia showed a warning message about the graphics card not receiving enough power.
The logical assumption is assume that the power supply is failing. Do you think I'm correct my assumptions and does anyone know of a reliable power supply comparable to the one I posted? No more then 70$
Thank you for your time!