Cant boot into Windows with 241+fsb

[Heligrin]

Like the title says, i am unable to boot into windows when the FSB/HTT is above 240. I tried 250, but that would just restart in the middle of the windows logo. 245 would BSOD after it booted past the title bar, the welcome screen BSOD. I am able to boot into 240 and i did a 1 hour prime before i decided to up the FSB again. I dont know why 250 is unable to boot.
Cpu volts at 1.45
Ram: 2.7

Help

Asus A8N-Sli deluxe
3700+ San Diego
G.SKill HZ ddr 500
Antec TP II 550W

 

[Dr. X]

1t or 2t timing? I can't get my HZ over 240 on my a8n-e without 2t. After that, it'll go to 270.

 

[Mayhs]

might have hit the max fsb for your motherboard?..its not the best oc'ing motherboard

 

[Heligrin]

Was 1T problem. 2t and im good, ty