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

 

I think you are asking for trouble.
How did you do your overclock?
Did you just striaght out use clockgen, or did you pinmod a 400Mhz bus Pentium M to a 533Mhz bus speed?

Pinmodding is much safer than pushing the frontside bus that far. This is because the pinmod will only cause the system bus to increase, to 133, so that the entire system benefits (but is not stressed). Your chipset can run the 133Mhz bus, so pinmodding is not exactly overclocking teh system.
You may want to invest in a faster pentium M with a 7x5 model and pinmod it from there. If I am not mistaken, you can pinmod the fastest 7x5 processor to 2.8Ghz, which isnt too shabby.

As for the graphics card, I wouldnt do it. The gpu is a chipset based one in your system, and once you push it too far, you need to get a new motherboard.

I have done hardwiring of PLL's in the past, but never replacing them. I am not sure the results you are looking for will be any fruitful, cause pll swapping seems very danngerous.
What PLL do you have now?
I would email the manufacturer of the PLL and see what they tell you.
I know a guy at Cypress technologies, who could get you some information on their pll chips.

I am not sure anyonw here know what pll you can swap it with, so your best bet is to email the different pll manufacturers, like ICS, Realtek, Cypress and so forth.

K-TRON

 

Thanks for your input K-TRON.

My PLL is i95**1416 (or something, top of my head) from clockgen drop-down (note, this is the internal clock PLL). I need to find out which one is the external clock PLL, before I know what model it is.

I am aware of all the dangers associated with this procedure. My components are already handling speeds in excess of my proposed PLL OC by manipulation of the internal clocks PLL.

I feel the most danger comes from my soldering skills.

My aim is simply to OC 1 locked clock (external clock). However this may lead to a new type of Hardwire OC. I am willing to risk my property to attempt this. It is to increase the memory bandwidth that my integrated graphics card has access to. I have seen equivalent cores score twice (3dmark03) what I am getting OC'd just from having discrete ram in the ballpark MHz of where I would like to take this baby.

Anyone who knows which PLL controls the external clock PLEASE let me know. Thanks again.

 

I don't know the PLL but as I was interested by this thread I thought I owe to bring it up.