Sony Vaio F series, (PCG-F480)

[goku2100]

I purchased an MMC2 PIII 850MHZ processor off ebay. I installed it into my laptop and it works, but there is a problem. First the bios detects it as a 1000mhz processor which doesn't really bother me but when I boot into windows, CPUZ detects it as a 700MHZ processor which is the speedstep speed of the processor, so it's running slower than it should be. The laptop has got a power management utility so when I switched to peformance mode, it locks up. So I install intel's speedstep program for the older speedstep series and it detects it as running in battery mode, well when I switch to performance mode, the laptop once agian locks up. So I'm wondering how I should go about fixing this issue.

I've been trying to figure out how much the F series laptops have evolved and if I could simply upgrade the bios in my laptop to that of the PCG-F600 <-- (Made up model number but it's in the 600s) which has a 750MHZ processor and a similar video card.



So I'm wondering think it's possible/good idea to download a bios update from a newer F series based laptop?

F-590 Laptop= http://esupport.sony.com/US/perl/mod...pl?mdl=PCGF590

Very similar specs and mentions it running with a 750mhz PIII processor.

F-480 Laptop= http://esupport.sony.com/US/perl/mod...pl?mdl=PCGF480

The specifications of both laptops are very similar and also this page brings me to the conclusion that a bios flash for this laptop would work.

http://esupport.sony.com/US/perl/swu...id=779&os_id=6
(Click on See all applicable models and Operating Systems) and read the list, it mentions the 590K. That bios is from 2001. But I was wondering if I could instead upgrade to a bios that is from 2003 from the 590K page instead which only mentions the 590 laptop.
http://esupport.sony.com/US/perl/swu...id=763&os_id=6

I'm a bit confused as to why one bios would pertain to a huge series of laptops and then a even newer version of the bios pertaining to only a limited number of laptops. Also can anyone tell me what they changed in the newer bioses besides 'operating system compatibility' and also whether or not using the new bios with windows 98 would be a bad idea..


Also there is the PCG-F690 series laptop which knowingly has an 850MHZ processor and I was wondering if flashing to an updated bios for that laptop would be of any help to me at all or possible or not. The only difference I see for that laptop is that it's got an 8MB ATI Rage Mobility Graphics card instead. It would appear that the F series laptops have a lot in common, especially the PIII series amongst them selves. Anyone know about flashing bioses from different model laptops?

PCG-F690: http://esupport.sony.com/US/perl/swu-do ... 33&os_id=6