FSB:DRAM Ratio Locked?

Dear Community,


Hello! Giving thanks in advance to the inevitable comments.

Now to the business at hand...

I have the follow specifications for a computer I received a while ago:
*Celeron D 440 @ 2 Ghz
*2 GB DDR2-800 Mhz RAM
*nVidia GeForce 8600 GTS
*PCCHIPS P53G motherboard

Now, the computer is not that bad if the CPU wasn't bottlenecking the GPU. Thus, I decided to overclock the CPU, after noticing that the Celeron D 440 can reach clock speeds of 3.4 Ghz. Problem is that every single time I increase the FSB, the DRAM frequency increases. CPU-Z confirms its a 3:5 ratio. For the life of me, I can't find the setting to get it to 1:1 (or at least something favorable to overclock the CPU).

I noted a setting in the AMIBIOS (latest update for P53G of course) under the Frequency/Voltage Settings called "DRAM Frequency." It has four settings: "auto", "400", "533", and "600". Unfortunately, changing the parameters does not reflect any change in CPU-Z in both the FSB/DRAM ratio nor the DRAM frequency itself.

Much help greatly appreciated!

When I was making a run through of setting the FSB frequencies at BIOS, I noticed something peculiar.
*From 200 MHz to 215 MHz, it runs stable.
*Anything higher is unstable...
*Except, when at 260 MHz, it runs stable again, however CPU-z notes an FSB of 199 MHz. (Windows says my processor is 1990 MHz.)

I believed the correlation has to do something with hitting a 4:5 FSB/DRAM ratio. Although, yet again, CPU-z says its still 3:5. (I tried setting the FSB at BIOS to 333 MHz, didn't do anything ).

As for reference memory setting, I can't find anything. Although there was a setting for "RAM Share" at the Advanced Chipset menu.