You are welcome, Marten.Marten wrote: I tried to use 133fsb method described above, but every time I short 54 and 55 pins I get:
1) Normal windows boot, 100fsb.
2) Windows doesn't boot.
3) Windows blue screen error, different every time like:SOMETHING_BAD_HAS_HAPPENED.
I tried using setfsb, but if I change frequency sound shuts down. RAM works at 133Mhz(Binh, thanks for your guide ).Mb I should underclock other devices before using setfsb?
Now, let's make more details about your unsuccessful OC attemp: can you post the config of your laptop ? There are 3 reasons that make failure at 133 fsb mod:
- Processor: if yours processor is Banias or high frequency Dothan (>1.8Ghz, i.e. PM 745) then it is more likely to be the reason.
- Memory: some modules can not work at 178Mhz (when FSB is set to 133 Mhz). But I never saw those modules. Try to check the memory timings to make sure that they have relaxed value.
- Chipset: some (rare) old 855PM chipset can not work at 133 Mhz FSB.
For eliminating the CPU as the reason of failure, you can set it frequency to Maximum Battery in the BIOS.
As for SetFSB, you are lucky that your laptop has CY28346ZI-2 PLL chip. But using SetFSB you are expected to get only about 10% overclock due to the fact that Sound and LAN controllers on 855PM chipset can not get higher FSB.