AM2 Overclocking issue...

[996GT2]

Just got my AM2 3500+ yesterday, and did a bit of OC max finding before installing the drivers and stuff...

Here's my question:

My CPU will boot into windows at 240 HTT *11 (approx 2.65 GHz) at the stock VCore of 1.344V (just boot windows, didnt Prime it yet). However when I drop the HTT to 236 it won't even boot into BIOS and I have to reset CMOS...why is this? It also will not boot at 236 or 238 when I up the voltage a bit to 1.375V, but at 240 HTT it is fine...

Anyone know why this is?
My CPU stepping is LBBVF 0617 TPAW, and my components are in the sig

Also my MSI K9N Platinum board's highest VCore setting is 1.4V (If I press the UP arrow it goes back to the bottom of the list which is like .8V), and I can't change the RAM voltage at all, since it is grayed out even if I set RAM settings to manual....anyone know why this is also?

 

[avi85]

maybe your mobo is automatically setting the ram divider and it is setting it too high when htt=236 but when you do 240 it lowers the divider.

 

[Avalon]

Originally posted by: avi85
maybe your mobo is automatically setting the ram divider and it is setting it too high when htt=236 but when you do 240 it lowers the divider.

That's a good possibility.
Another that I can think of off the top of my head is that your board has an HTT hole. It's not common, but I can remember a board or two where a certain FSB setting(or range of settings) wouldn't work unless you went before or past them.