Startup crash help please

hey im in desperate need of help solving my pc problem any help would be great.the problem is my pc freezes a few mins after i start it up,the dvd drawer opens but other than that the screem remains on but froze an moving mouse ect doesnt make it do anything.when i do a restart it usually makes it to the bios then freezes again,restart again it remains blank an emits a beeping,this can go on for 10-15mins then it will start up an be fine for hours with no crashes or problems.i dont think its a temp problem cause the pc isnt hot when i start it up and the fans are all clean and running fine.my only idea is the graphics card,last time i reinstalled xp (which ive done many times)there were no crashes till i put on the drivers for g-card.tried updating them an it hasnt helped.
amd athlon 1800+ 1.4ghz
1g ram
radeon 9800 pro
xp service pack 2
Board: KM266-8235
Bus Clock: 133 megahertz
BIOS: Award Software International, Inc. 6.00 PG 05/05/2003
 
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