Possible to unlock mobile CPU multi?

Hi,

I was reading this:
http://en.wikipedia.org/wiki/CPU_locking

And it makes me think there must be a way to unlock the multi on my CPU (T7300).

I'm looking for something like this:
http://www.motherboards.org/forums/viewtopic.php?t=22499

Also is there any way to force IDA to be always on, and make it not dissable a core?

Here is the datasheet for my CPU:
http://download.intel.com/design/mobile/datashts/31674505.pdf

Any chance of me going from 10x to 11x?

 

Last I checked, Intel hardware locks the multiplier. No dice here.

 

But there must be a way around it.

I found an interesting paragraph:

From the datasheet I gave a link to.

 

Many users talk about pin-mod to unlock the CPU. I would not recommend this, personally.

cheers ...

 

I wouldn't mess with something like that, even if it is doable...

Anyways, I think the multipliers might be doable with a CPU microcode modification, but who would tell you that code ?

 

Intel Dynamic Acceleration Technology was used to overclock a single CPU core when the other one was shut down and not needed. The design was implemented via hardware, not software.

This is hardware, plain and simple, and modifying this is not going to be possible.

 

here is some helpfull info, thankyou.

Any chance you know what software can give me a dump of the CPU microcode?

 

You might need to contact Intel on that one...good luck getting it without their help. Seriously.

 

So not even a pin mod could force IDA on?

 

Nope. That last pin mod that actually worked on a mobile CPU was with the old Pentium M that had a 400MHz FSB. You could pin mod it to a 533MHz FSB. That modified a PLL, not the inner workings of the CPU.

 

I don't understand what you mean by inner workings of the CPU.

You can do a volt mod ( http://forum.notebookreview.com/showthread.php?t=390696) to this CPU, does that count as inner workings?
Also the BSEL mod does work with this chipset (but the multi goes to the lowest value).

There are a lot of reserved pins, I wonder what they do:

and:

 

Yeaaaaah moral hazard, always on the cpu OCing quest lol

Well, if you find out how to do it, PM me

 

The celeron in my sig would beg to differ. Intel wised up a bit though so that can't be done with CPUs with changeable multipliers.

Not at all. That is the external voltage it is connected to.

They usually don't do anything and may be there in case Intel wants to add stuff in the future or just for grins and giggles. For instance, there were Pentium D's for socket 478 and for socket 775, so obviously they don't need all those pins. At the same time, however, it is known that some things listed as "reserved" by Intel actually do function, but outside the scope of anything motherboard manufacturers and programmers would need to know or have any business dealing with.

There is no concrete answer that I know of for IDA to be modified or done differently to overclock all the cores at a higher multiplier. We know for a fact that a higher multiplier is available to one or more of the cores and drivers and/or the motherboard bios allow for its functionality. But knowing Intel, I doubt they would not leave a loophole like that and I can think of ways for them to make sure it doesn't happen. The socket P chips have a double whammy with locked multipliers and if the PLL doesn't match what it is supposed to be, it locks the cpu to its lowest multiplier. That is all via hardware in the CPU itself.

Honestly I think the best bet for any mobile overclocking is a modified motherboard bios that allows for FSB overclocking. Turn that crap IDA stuff off and set the FSB as high as it will go. The number of people who have the know how is pretty small, and the number of people who have the know how and are willing to do this is probably nil. On the desktop scene there is no trouble overclocking because almost all motherboard manufacturers have some degree of overclockability in their bioses.

 

It is possible that I am wrong, but I have not heard of other chips that can be pin modded. I do not mean overclocking, I mean pin modding.

 

It is pinmodded. Celerons don't have speed step so it doesn't lock to a 6x multiplier if the PLL doesn't match what it is supposed to, which happens with any other socket P processors. Mine for example is at 11 x 266Mhz.

 

Mine (T7500 at 2.2Ghz) says the same thing in RMClk. It says it's multiplier is set at 11x but it displays the IDA 12x multiplier with increased CPU voltage set as last option where the cpu would be at 2.4Ghz. I could not find a way to use IDA yet.

 

I am currently overclocking my FSB with setfsb after a PLL pin mod as shown in my sig.
But I am trying to get around my ram instability.

I still think that the reserved pins would do something usefull.
If only I had unlimited notebooks to do tests with

I guess I need to do more research for now...

@All, Thanks for the help so far

 

will do

my IDA would never come on (or hardly ever).

But when I use crystalcpuid, I get my multi switching back and forth from 11x to 10x.
http://valid.canardpc.com/show_oc.php?id=733684

Start crystalcpuid, select function>intel enhanced speedset control>new multi>12x

You should now see it hit 12x a lot more.

I noticed RMclock doesn't do this well.


If anyone knows how intel locks the multi, please tell me

 

this is a bit off topic, but if anyone has a Phenom II you can unlock the CPU multiplier, Vcore and fourth core:
http://www.ocinside.de/go_e.html?http://www.ocinside.de/html/workshop/amd_phenom_ii_bsp.html


I wonder if intel and AMD lock the multi in different ways.

I know some AMD CPUs could have their multi unlocked with a CPU pin mod, so it makes me really think the reserved pins on my intel CPU could change the multi.

 

Does anyone have an idea of what the things I circled in the following photo do?

It's not in that datasheet.

I bet that those pads I circled in red could somehow unlock the multi.
Or maybe the resistors circled in blue.

If anyone has a photo of two simmilar intel mobile CPUs, one with a locked multi and one with unlocked, can you please post it here?

 

I don't know much about the things you circled, but I doubt modding a resistor will unlock multipliers. Multipliers are a digital property and resistors themselves are analog components used to limit voltage and current.

At best playing with the right resistor could increase the voltage going through the CPU, letting you obtain higher clocks, but you can just do that via software anyway. Some desktop ATi cards have this ability if you "pencil mod" them, ie: using a pencil to color over part of a resistor and decrease its resistance ever so slightly, increasing voltage to a component and thus letting you obtain higher stable clocks.

/2cents

 

See the link in my first post on how to "pencil mod" desktop AMD cpu to unlock multi.

But thanks for the input.

Also I already know how to pin mod my T7300 mobile CPU to increase and decrease voltage. I need to change the multi now.

I can't believe intel, why dont they have proper datasheets.
I guess that's why the word datash*ts gets thrown around...

 

Oh. Well I guess I'm wrong then lol. +rep for knowing what on earth you're talking about. Sorry :X

lol probably to circumvent people like you. But I do wish you the best of luck.

 

no, need to be. The more comments, the better

Thanks, but I dont think I'll get anywhere with this

But I feel it's not right for intel to hide so much info.
Every datasheet of theirs, even chipset datasheets, hides all the good stuff.

 

Maybe you should contact them and ask them for the datasheets. Since you don't have a giant fab plant in your backyard I doubt they'd be as wary as if say, AMD or VIA asked for the same info.

 

That's not a bad idea, the worst they could do is say no.
I might shoot off a couple of emails and see what they say.

 

Sounds good, keep us posted.