AMD only runs at 1500+

[donsopp]

Hi everyone
can anyone give me an idea of what is going on. I upgraded my system with KT3 Ultra board from MSI, AMD Athlon XP 2000+ and find that the reported frequency is 1500+. Now I know that the speeds are "less" than as sold but when I set the bus to 133 and ration to x13.5 the system just freezes on the POST. Not explaining this well but it only seems able to run as 1500+ Help

[reboot]

Go into BIOS setup, and set "Failsafe Defaults".
In Power manage, set "IRQ for modem", to N/A.
In Peripherals, disable modem.
In RAM timing, set it to 133/266mhz.
Also in RAM timing, set it to CAS 3.
Restart, and try again.
If it still fails, check the RAM.

[Confused]

XP2000 runs at 1666.66 thus you should be 133 X 12.5, not 13.5
Chas

[reboot]

The CPU is multiplier locked, so it won't matter what you set it to in BIOS...unless you have one of the VERY rare ones that's not locked.

[sleepypost]

AMD doesn't wimp out like intel and lock their chips.... His chip isn't locked. Confused explained it well...

[donsopp]

Ok have looked at BIOS. No setting to go to CAS3 only 2.5 Other settings do not clear problem. Ram was purchased specifically described as recommended for this board. When I set the parameters at 133 and multiplier 12.5/13 (it is a combined setting) then either the system locks and I need to clear the CMOS or Windows XP home repeatedly boots Don't know if this makes it any clearer but still can only run with it showing as a 1500+. Think I'll take the fan off again and make sure of the CPU spec.

[glc]

sleepy: Most AMD chips are in fact multiplier locked from the factory. There are ways to unlock them.