Sounds like a memory issue. Multiple shourt beeps from the mobo indicated memory isn't recognized. If it is 800mhz ddr2 and your board only supports ddr533............it will hot recognize that memory. Put in the new CPU and graphics card and the old memory. I'll bet your be fine.
Noli Nothis Permittere Te Terere!!
EVGA 680i, Dual EVGA 8800GT'S (650/950), 4 gigs OCZ DDR2 1066, Intel Q9450 at 3.8 Ghz, Koolance Water Cooled, Dual Plextor16x DL DVD+/-RW. Dual WD 250gb 16mb Cache Sata 3.0. 3DMark06 score = 19,168.