Motherboard Modification Help

Hi all,

This is my first post so I am gonna make it a goody.

I am willing to sacrifice my laptop if necessary to overclock it to its limit.

We'll start with the current setup:

Original Model:

toshiba satellite pro M40.

Upgrades:

Ram 1 gig 533 ddr2 4-4-4-12
CPU pentium m 1.73 533 FSB

Current OC:

2.5 Ghz CPU using clockgen 100% stable @ stock volts
GPU 400Mhz using powerstrip no artifacts.

So, the clockgen runs up to 190Mhz FSB on the internal clock with no ill effects.

External clock: remains at 133MHz. (up from the celeron which is 100Mhz)

Because the GPU is pre-dominantly bottlenecked by the RAM interface speeds (external clock) I want to be able to raise this particular clock. When I raised the FSB by changing out the processor I got a 66% increase in graphics performance. This means that if I can raise it more I should actually be able to get this baby to run some good games.

PLAN OF ACTION:
I know that all of the clocks in a system use a PLL (phase locked loop) component to reference the system clocks from. It is through manipulating these that tools like clockgen, setfsb, etc. work.

I need to know which PLL to replace on the motherboard. All I have to do is Identify the right one and replace it with one that has a 25% higher frequency.

The system specification for the Xpress200m chipset (RS400M/RC410/RS480, SB400, NB400) states clearly that the board itself is designed to go up to 667MHz FSB. So the mobo can handle it. The RAM is hard set to asynch (unlinked mode) so will not be affected by the change. The GPU and the CPU are already OCed WAY past 25% so they can handle it.

Essentially the only thing stopping it from working is setting it up.

Please could someone with real knowledge of motherboard help me identify which one to replace.

Thanks for taking the time to read this, and I apologise if it has gone over your head. Please ask your most hardcore OCing buddies if they can help.

Cheers,

Brian