Need the help of some highly-technical people

EDIT: OK, well I did the pin mod both ways. Bridging BSEL1 and BSEL0 gave me 166MHz, which actually contradicts what I've been reading (it pulled BSEL0 HIGH, when it should've pulled BSEL1 LOW), and bridging BSEL1 to the VSS above it resulted in 266 (success!), however my CPU's multi was locked to 6 (boo!) meaning my CPU speed was only 1.6GHz. Fully loading the CPU and disabling all Windows 7's power management didn't do anything for the speed, either. Googled a bit further and found that people are speculating Intel multi-locks the CPU when the BSEL is different from what's expected. Looks like I'm done. =|

Alright, I'm trying to do something it appears (per google) that nobody has yet done: I'm trying to pin-mod a Penryn chip to a higher FSB. Something that has been done with tons of C2D desktop and Pentium-M mobile chips.

I've found the pinouts and the bsel tables, but have idea what I need to do to to change the bsel readings.

BSEL pin settings table

BSEL pins highlighted

What I want to do is move BSEL1 to LOW. That would give me a 266x10 FSB (2.66 ghz). However, where I'm stuck is, I'm not sure exactly HOW to make BSEL1 read LOW.

From what I've read, I can either connect BSEL1 to BSEL0 and that should bring BSEL1 to LOW, or I can connect BSEL1 to a VCC or VSS pin, but I'm not sure which of those.

I've done the pin-mod in the past to a Pent-M, but it was a simple one as there's only two BSELs on that CPU!

Somebody help?

 

Your missing some crucial information here.

What system do you currently own? What's the chipset, CPU (processor model) etc?

My only guess as to why it's not working is because the maximum supported frequency is 266Mhz, and which the board was already running until you used the BSEL pin mods and overrided it to run it lower. Anyhow, it's just speculation until further information is provided.

 

After looking at the pinouts. Try bridging BSEL[1] to a nearby VSS ie;A-23.

That might give you the L L L you require for 266mhz for your T4200.

 

Ouch. Looks like Intel is restricting the possibility of overclocking here with the multi-locks. Great attempt though. Props!

 

Maybe you can use some software to change the ID of the CPU, I know it's possible but don't know the details.
If it thinks it's another CPU, then maybe it won't mind letting the multi be adjusted

 

Doubt it, I believe the processor ID of the CPU is embedded in the chip. It's not possible simply because Intel will never allow it, it would open up too many opportunities for people, ie: mark a processor as something else and sell it for a profit.

 

I saw it with an AMD chip a while back, setting a really low end chip to be high end... or vice versa.

 

OK, well I should've mentioned it was a PM45 chipset which is capable of running 1066 FSB CPUs.

In any case, Intel is getting their way, because if I'm going to get a faster CPU, it'll have to be by buying a new one. :|

 

Are you by any chance using Intel Core2duo T5xxx series processor or any intel pentium dual core ones? Those pin mod doesn't work on those processors because of a hardware lock on the CPU. It's like back in those days, AMD used a piece of hardware to prevent people hardware modding the cpu to get higher speed.

When you do those hardware mod, the processor will run at higher FSB, but they'll by design lock themselves to its lowest multiplier.

The only pinmod that works on those processors are voltage mod.

Did you bridge those pins with conductive pen or draw the connection with a pencil? If it's the above, you can probably use rubbing alcohal to remove the residue to return your CPU to its default settings.

 

No there are no bridges on the the processor like the AMD cpus back in the Tbred and Barton days. That diagram is actually connecting the pins in the socket instead which did override the FSB, apparently the OP is stating that it worked but the multiplier was then locked down to 6x rather than utilizing any type of speedstep to acheive full overclocked speed. His FSB was overclocked to 266mhz....

 

That's correct. I used a single strand of wire stuck in the two adjacent holes of the socket to bridge the pins on the CPU. It was a simple matter of pulling the CPU and using a small piece of tape to remove the wire. The FSB changed to the value represented in the table when I caused BSEL1 to go LOW, but then the multi locked at 6x. The CPU in question is my Pentium Dual-Core T4200 in my sig. I wonder if there's a way to disable the multi-lock or change the multi using the pins - the CPU is obviously capable of going between 6x and 10x.....


I actually miss using the surface-mount bridges to mod the CPU. You could easily control everything from there, FSB, voltage, without having to remove the cpu!

 

Yes.. i'm quite aware of that. I was just using AMD's example that chip maker implemented features on the cpu die which locks the cpu in its lowest multiplier when the FSB is raised.

When the OP overclocked to 266mhz, the multiplier thus will be locked to 6x and all the higher multiplier will be "disabled".

 

to the OP;

have you tried software overclocking? setfsb or similar?

i've read that overclocking with setfsb is sometimes possible on pm45 albeit with limited results (i.e. 200mz increase or less). still, if it's possible then this would be better than a 400mhz drop! - by the way i'm not trying to poke fun with that comment i'm just saying...

it's just that i'm looking to buy a studio 15 with the same cpu/chipset and was hoping to overclock.

 

Just wanted to give you a rep for attempting what everyone else is scared to do.

 

Thanks. If there's one thing I'm not afraid to do, it's void the warranty of and possibly damage electronic devices worth hundreds to thousands!

 

Direct pin mod CPU socket will either lock the multi or maschine doesn´t boot. I done the BSEL mod on my old M570RU direct on PLL and boot no problem, default 200x14, after mod 266x14(too high to boot), 266x13/12 no problem.