Overclock problem

[liveforeva]

Hi i have just brought a AMD Athlon 64 4000+ San Diego (Socket 939) - OEM (CP-175-AM) CPU.

I have overclocked it to 2.75 with windows runing ok, anything over and it will not boot in to windows. But when i play any games my pc crashes, so i have to clock it back down to 2.52 before games will play ok.

Why is this as i have heard that you can clock it up to 3.0 gig ?

My spec is
Foxconn NF4UK8AA-8EKRS mainborad
AMD 64 4000
1.50 gig of ddr ram
HIS ATI Radeon X1900 XT-X

 

[liveforeva]

My cooler is a Asus Star Ice and the v core voltage is at default but the v core regulator is at 1.55

 

[liveforeva]

Ok thanks.
What should i up my voltage by?

 

[liveforeva]

Cheers thanks

 

[liveforeva]

I have 2x 512 ddr plus 2x 256 ddr

 

[liveforeva]

Thanks i will try that.

I am thinking of geting a new motherborad, do you recommend that i get one and if so which one should i go for that would be perfect for my setup ?