System crash probs

[psychobrigade00]

ok i just redid my system im using the asus A7n8x deluxe with and xp2600+ processor and 512 mb of pc2700 ram. When running any game on XPSP1 it crashes to the desktop or reboots the pc. I have all the newest drivers for my gforce 4 ti4200 128mb and all other system devices. Im running directx 8.1. Any ideas?????

 

[psychobrigade00]

voltage to ram is 2.6v already 1.5 to agp i have bios set with 256mb aperture also ram is PNY also dont know if it matters but agp fastwrite is on

 

[psychobrigade00]

im thinking of just exchanging the mboard with another one cause my setup used to be some old soyo board with a pIII 733mhz~ and 640mb of pc100 ram and win xp and it was all working just fine. Only things i changed were now i have the Asus A7N8X Deluxe an AMD Athlon xp2600+ and 512mb PNY pc2700 ram with XPSP1 plus i dropped out my old audigy gamer cause i didnt need it and now same games arnt working.

 

[psychobrigade00]

oh forgot to mention 450 watt powersupply but that didnt change