well, yes it works but there is a problem,./.......
1. First it only works on VIA(and some amd/sis(mabye)) chipsets.
2. Ok so for exaple... you have a 2400+tbred..133x15=2000 right well say you want to go for 200x10=2000..should be no prob right....wrong... Because the multiplier has to be changed from the desktop so you have to boot with your 15 multiplyer.(15x200)=3000(not possible, and if it was WHY would you want to lower your multiplyer to 10 in the first place...lol).
3. so you say way not boot at 133x15=2000 and then after booting lower the multiplyer from the destop using power now with CPUMSR, and raise the bus with clockgen or cpufsb(or others)Well thats seem all fine. but now there is another problem......
Via motherboards have AGP/PCI deviser ratios(pci are NOT locked)
to boot with a 133 bus you have to have a 4:2:1 FSB/APG/PCI deviser(133/66/33), and there is no way(to my knowledge) of changing the deviser from the desktop, so when you raise your FSB to 200, your PCI/AGP will look like this>>>>>>>>>>>200/100/50...OMGosh. thats way to much.
and if you try to change the deviser in bios to 5:2:1/6:2:1 with a 133 bus unfornunatly you get a NO POST, because then the AGP/PCI buses are to low(44/22)or(52/26)
i know this all from personal experiance(sadly). i have two post week 39 chips. one is a week 48 2400+tbred, and the other is a week 52 2500+ barton. i have done the Mobile mod on both of then with NO avail......
so i just ended up buying the 2 mobiles i have is now, which obviosly did the trick, both 2600+XP-M's
, which in my opinion , besides getin a pre week 39 chip, getting a true mobile is your only hope for an unlocked multiplier in the socket a world, well thats just my 2 cents........