E7300 3ghz unstable?!?

[PILLAGER]

Hello i tried my first overclock yesterday by raising fsb to 300 and leaving DRAM frequency on auto. After i logged in i looked at cpuz and it said ram was 1:1 ratio (as it should be?), i then ran prime95 and it gives an error after roughly 1min saying HARDWARE FAILURE shortly after the screen will go all fuzzy for a second and it will reboot. So i set defaults, logged back in and Whocrashed says ati driver caused crash. Anyone can help?

coretemp VID 1.2500v
c2d e7300
Asrock 4CoreDual-SATA2 (the board accepts ddr1 and ddr2 with 2gb limit) P2.20 BIOS
1x 2gb stick off ddr2 PC2-6400 (400 MHz) kingston
HD4890 1gb vtx3d
be quiet 530w psu
win 7 32bit ultimate

i just tried fsb at 333 woulnt even show post screen so i reset cmos and now multiplier is at 6, does this mean my cpu is now broken?

 

[Toxxyc]

Have you increased the CPU voltage accordingly with the overclock? Stock voltage with higher clock speed will result in instability in many cases, specially if the VCore doesn't increase automatically.

 

[PILLAGER]

just found out that you cant change cpu voltage on this board so nvm thx anyway

 

[cadder]

Did your set your PCI bus to 100MHz?