Irrelevant m860tu & setfsb discovery

I'm officially a fan of irrelevant discoveries, no idea how someone could use this info right now but you just never know.

Actually as I type I've realized that perhaps one could use this to override the 6x multi lock with BSEL FSB mods on pm965 and pm45 chipsets... although I'm not sure that would be more productive than simply finding a way to use setfsb at all with 800mhz fsb cpus on this laptop... hmm.
Screenshot:


The weirdest thing about this is the 6th slider position normally gets you 333mhz FSB.
280mhz is like 1C or something, and 1F makes it 290mhz, but 333mhz is 2C by default and then 2F lowers the FSB?
I'll do some more messing around later...

 

Last i checked changing PLL registers wont mess with the CPU Multiplier. All i see so far is you manually changing the registers, something the program actually does already when you change the fsb.

As far as changing to 2F the number might be out of range for the operation the PLL is doing and the number is actually ending up something lower than 2C represents.

 

No you completely missed my point.

Setfsb does not support the m860tu PLL. The one I have selected happens to have registers that work but there are about 6 modes overall and the slider does not change the FSB in a linear way. Its pretty random.
Even if it was the correct PLL, I don't think it would let me lower the FSB frequency.... I also just got 166mhz and SLFM is still working, so it goes down to 83mhz FSB and cpu at 500mhz.
wonder how much battery I could get lol

but no, the program will not do what I did automatically because the PLL isn't supported.

What I was thinking of doing to use this for overclocking is doing a BSEL mod on the CPU first like t9300 going from 200 > 266mhz FSB. Normally the chipset locks at 6x as you know. However with the 200mhz FSB mode it could unlock it back to 12.5x, then stay at that multi when going back up to 266mhz for about 3.3ghz.
Unfortunately I don't think that would be practical I just realized because it restarts when I go directly from one FSB mode to another.

 

I dont think that will happen.

In fact when I did my BSEL mod (T7300 200mhz > 266mhz) and underclocked it with setfsb, the multi did not go back up to 10.
Nothing I tried could get it back to 10.

Someone who could toggle EIST with throttlestop normally could not enable EIST after a BSEL mod.
Once you boot up with a BSEL mod, if you can't re-enable EIST so you cant get a higher multi.

When you use setfsb you do not change the value of the frequency select pins, so the MCH is still unhappy.

BTW you could try setPLL instead of setfsb:
http://forum.notebookreview.com/har...clocking-methods-examples-84.html#post7153216

 

Ahhh if the PLL isnt support then what you can actually do is give any data you find to the developer and they can add support. Sadly though the newer versions arent free so might not be in your interest but it would be in everyone elses.

 

Thats kind of what I figured, thanks.

I've downloaded it setpll & will probably try it soon. I'm sure I'll find out but does the user basically add support for whatever PLL they want?
I was trying everything that others had with setfsb last night (quoted below in response to clutchx2), and recording the hex bits... So I think I could pretty much add support now. There's a pretty obvious pattern but a few things don't make sense yet.

I'll probably post this in your thread but do you know what it could mean when there are a ton of different hex bits that all give the same FSB? I assume its normal but there must be more to it as well.
Heres what I've documented so far:

Spoiler

333:
0c
2c
4c
6c
8c
AC
EC

287:
1F
5f
7f

280:
1C
3C
5C
7C
9C
BC
CC

278:
5b
7b

269:
10
18
38
58
78
90
98
B8
D8
F8

266:
08
28
40
60
68
88
A8
C8
E8

200:
0F
2f
4f
6f
AF
ef
48

166:
2b
4b
0b

All just the first byte in the diagnosis tab, nothing else changes ever.

kinda still thinking it would be cool to find a 300mhz mode, right now we have 333mhz and 287.5 which is a big jump, also of course anything above 333 would be awesome. It seems the 200mhz mode is sort of a fallback mode sometimes, the bits that will get it to do that don't make as much sense.

LOL, once again you vastly underestimate my knowledge and confuse what I'm trying to do.
We already know basic FSB overclocking, just looking for more modes, which is exactly what ABO would probably do so i'm not going to throw money at him for no reason.

 

Yes.

I have no idea , I've never had a PLL like yours.

 

AHA!

Looks like I was overthinking this a little


The FSB overclocking normally wouldn't work at all with 200/800mhz FSB, but if you go to one of the hex bits I found first, it will let you get to 266/1066mhz FSB with full multipliers

New opportunities for 3-4ghz frequencies on the m860tu without an extreme CPU!!
This is so surprisingly stable, just sitting here typing with an old, cheap OEM t6 series CPU at 2.9ghz... lol. My RAM OCd at 1066 but only cas6.