LGA775 socket in an Intel D915GAG AAC77881-303

The 915 chipset is old; not many upgrades possible, except for the hot running 3.6 or 3.8, which might require a bios flash. I wouldn't upgrade it; apply any money towards building a new system.

i am sry buddy but the cpus for your motherboard are not any more under building status like l1die said get som money and for 700-800€ you can get a intel core i7 the newest proessor ever(till now)
but anyway if you realy want to spend some time on your old pc here you´ve got a list of suported cpus
Processor Family Processor Number Processor Speed System Bus Frequency L2 Cache Size BIOS Version
Intel® Pentium® 4 670 3.80 GHz 800 MHz 2 MB 0391 or greater
660 3.60 GHz 800 MHz 2 MB 0401 or greater
650 3.40 GHz 800 MHz 2 MB 0401 or greater
640 3.20 GHz 800 MHz 2 MB 0401 or greater
630 3 GHz 800 MHz 2 MB 0401 or greater
571 3.80 GHz 800 MHz 1 MB 0283 or greater
570J 3.80 GHz 800 MHz 1 MB 0283 or greater
561 3.60 GHz 800 MHz 1 MB 0283 or greater
560J 3.60 GHz 800 MHz 1 MB 0283 or greater
560 3.60 GHz 800 MHz 1 MB 0209 or greater
551 3.40 GHz 800 MHz 1 MB 0283 or greater
550J 3.40 GHz 800 MHz 1 MB 0283 or greater
550 3.40 GHz 800 MHz 1 MB 0209 or greater
541 3.20 GHz 800 MHz 1 MB 0283 or greater
540J 3.20 GHz 800 MHz 1 MB 0283 or greater
540 3.20 GHz 800 MHz 1 MB 0209 or greater
531 3.00 GHz 800 MHz 1 MB 0283 or greater
530J 3 GHz 800 MHz 1 MB 0283 or greater
530 3 GHz 800 MHz 1 MB 0209 or greater
524 3.06 GHz 533 MHz 1 MB 0477 or greater
521 2.80 GHz 800 MHz 1 MB 0283 or greater
520J 2.80 GHz 800 MHz 1 MB 0283 or greater
520 2.80 GHz 800 MHz 1 MB 0209 or greater
519J 3.06 GHz 533 MHz 1 MB 0244 or greater
515J 2.93 GHz 533 MHz 1 MB 0244 or greater
515 2.93 GHz 533 MHz 1 MB 0244 or greater
511 2.80 GHz 533 MHz 1 MB 0475 or greater
Intel® Celeron® D 346 3.06 GHz 533 MHz 256 KB 0283 or greater
345J 3.06 GHz 533 MHz 256 KB 0283 or greater
341 2.93 GHz 533 MHz 256 KB 0283 or greater
340J 2.93 GHz 533 MHz 256 KB 0283 or greater
336 2.80 GHz 533 MHz 256 KB 0283 or greater
335J 2.80 GHz 533 MHz 256 KB 0283 or greater
331 2.66 GHz 533 MHz 256 KB 0283 or greater
330J 2.66 GHz 533 MHz 256 KB 0283 or greater
326 2.53 GHz 533 MHz 256 KB 0283 or greater
325J 2.53 GHz 533 MHz 256 KB 0283 or greater
320 2.40 GHz 533 MHz 256 KB 0469 or greater
315 2.26 GHz 533 MHz 256 KB 0475 or greater
310 2.13 GHz 533 MHz 256 KB 0475 or greater

well and if you need some help just pm me

greets laluma22

OK. I'm looking at 2007 items now. I just can't afford the new Intel and I have no idea about other CPU's.

If I got a Core 2 Quad Q9550 and a mobo for that, plus memory is less than $500.00. That leaves some extra for a graphics card.

This is the best I can find.