I just bought a KT400 Dragon Ultra (black) motherboard with an Athlon XP 2600 Barton and 512Mb stick of Corsair DDR400 ram. The motherboard specs say it supports both the processor and the ram, but I have a problem getting the CPU and the ram to clock at their designated speeds at the same time.

For example:

The CPU is rated for a FSB of 333, so I set the CPU clock in the bios for 166 (166x2)(333fsb). This gives me the correct CPU clock of around 1.9, but the memory will only allow 333Mhz if I do this.

In order to get the 400Mhz out of the memory, the CPU has to be underclocked and vice versa.

I've tried setting the CPU to 133 for a 266fsb and then adjusting the CPU ratio to get the full 1.9 clock, but the ratio will only go to 12.5 before it freezes my computer at boot up. At 12.5 the actual clock speed of the CPU is almost 1.7. While this isn't bad, I paid for a 1.9 CPU and 400Mhz ram and would like to get my money's worth. Does anyone out there have any more suggestions I could try.

Thanks in advance.

i didnt look up your motherboard for spec to what all it supports, but,...if your processor is a 333 (166x2) this is the speed the system will run at the ram will run 400, but this is if you either overclock the processor, or get a processor that runs a 400 mhz fsb to keep this simple i will use older specs as a example.
if you had a pentium3 with a 100mhz fsb and a stick of pc133sdr ram your fsb would be 100 mhz, unless you overclock.
if you had a pentium3 133mhz fsb and pc100sdr ram, your fsb would be 100 mhz unless you overclock.
if you have a pentium 3 133mhz, and pc 2100ddr ram you could run a 133x2 (266mhz fsb)
now in your case, you have a Athlon XP 333mhz fsb(166x2) you can only run a 333mhz fsb unless you overclock.