Overclocking R51e

[pizzahut88]

I've a R51e with a Celeron M370 (1.5GHz) and have just successfully overclocked it to 2.0GHz.

I am really pleased with the result.
This is also my first post here . . . been lurking here for a while reading and learning.

Instructions are here:
http://manfred-lai.blogspot.com/

and here:
http://www.overclockers.com/tips1204/

The steps for overclocking R51e is identical to overclocking a Dell Inspirion 6000.

After overclocking, the notebook didn't run hotter at all. Same cool and quiet.

Have fun guys.


Manfred

[Wilsonflyer]

Interesting... It's hard for me to believe that you could even get the pins of the CPU back into the socket after placing a jumper that appears to be so large into the holes.

Something doesn't smell right here. I'd love to hear input from others.

Is this supposedly applicable to the 4M as well?

[pizzahut88]

I used a single strand of copper wire from a modem line. That is just thin enough to fit into the two holes. Tips, their length is important - length of the copper wire just a tad bit longer than twice the length of a cpu pin. Use tweezers to get the job done properly.

The entire process of taking apart notebook takes about 20 minutes. Get several dishes to hold the screws. Preferably one dish for each section/assembly.

Once you have bridged the connection, don't replace the top cover just yet. But just re-attach the keyboard, boot-up and check with cpu-z that the cpu is running at 2.0GHz. (be careful not to touch/short anything else).

Once everything is fine, re-assemble the whole notebook. Take your time don't rush it. Don't strip the screws.

Also it makes life much easier if you do this in front of a 2nd desktop. Openning the R51e Hardware Maintenance manual on your desktop, follow the steps carefully . . . there are lots of diagrams . . . nothing really tricky . . .

I am typing up this reply on R51e Celeron overclocked to 2GHz right now . . . everything is stable. Surprisingly no heat issue at all!

Battery consumption isn't any faster . . . though I've not checked with a timer bla bla bla

BTW, this trick should only work on 90mn Celerons M with 400FSB.

Another thing, take your time when inserting the copper wire to bridge the two pins. Count and recount making sure you get the tiny piece of copper wire in the right holes. Have the socket image up on your 2nd desktop as you perform the task. I don't know what's gonna happen if you get it wrong, neither am I gonna find out but make sure you get right.

Lastly, this R51e budget notebook might turn out to be the best bargain on this planet afterall . . .

http://manfred-lai.blogspot.com/

Manfred

[pizzahut88]

Interesting... It's hard for me to believe that you could even get the pins of the CPU back into the socket after placing a jumper that appears to be so large into the holes.

Something doesn't smell right here. I'd love to hear input from others.

Is this supposedly applicable to the 4M as well?

Don't think this trick will work with Pentium Ms.
Since Pentium M is already running at 533MHz FSB . . . pushing it to 667MHz might make the whole system unstable.

Anyone here expert enough to could go thru those Intel reference manual and figure it out?

Manfred

[lithium726]

Interesting... It's hard for me to believe that you could even get the pins of the CPU back into the socket after placing a jumper that appears to be so large into the holes.

Something doesn't smell right here. I'd love to hear input from others.

Is this supposedly applicable to the 4M as well?

Don't think this trick will work with Pentium Ms.
Since Pentium M is already running at 533MHz FSB . . . pushing it to 667MHz might make the whole system unstable.

Anyone here expert enough to could go thru those Intel reference manual and figure it out?

Manfred

actually, you cannot do that. Basically, what these guys are doing is changing the signal that the BSEL0/1 pins are sending to the chipset on bootup. based on the combination of lo-hi on these two pins (00,01,10,11) the chipset will adjust the FSB. Not sure what combination gets what off the top of my head, but it should be obvious that this only works for FSB's which the chipset supports, and 667mhz isnt one of those (currently, afaik). For this reason, you can only do this mod on 90nm 400FSB Pentium M's and Celeron M's. You cannot tell the chipset to boot at 667mhz with any combination of pins, so you cannot clock a 533 chip to 667mhz. If you could, it would be no different than 400 ->533. Think about this - you take a 1.7ghz/400mhz and increase the FSB to 667mhz - you then have 2.26ghz. You take a 1.73ghz/533mhz chip and incrase the FSB to 667mhz, you have a 2.16ghz chip, basically the same thing.

If someone could figure out how to signal 667mhz to an i915, which it does support... Yonah runs just fine on the i915 according to my contact at Intel, but that would require a bios update and Im not sure if this functionality is enabled by default. But if its not, and the system boots up normally with a 667mhz bus, then all the bus deviders should work as expected and nothing else in the system would be overclocked.

Now then, as to the quote in the quote im responding too - Yes, this is applicable to P4-M chips too. Since all of these chips (core duo, p4, pentium M) use the same electrical bus, these pins are in the same place or very close to the same place on all of these chips. you would just need to look up exactly where they are and what combination of hi-lo you need to get the bus speed you want, and just short the pins to a ground or vcc pin to get it. (ie, if you want BSEL0 to be 0, ground it... if you want BSEL0 to be 1, short it with a VCC pin)

[pizzahut88]

Would like to thank lithium726 for his detailed explanatory.
Very much helpful indeed.

actually, you cannot do that. Basically, what these guys are doing is changing the signal that the BSEL0/1 pins are sending to the chipset on bootup. based on the combination of lo-hi on these two pins (00,01,10,11) the chipset will adjust the FSB. Not sure what combination gets what off the top of my head, but it should be obvious that this only works for FSB's which the chipset supports, and 667mhz isnt one of those (currently, afaik). For this reason, you can only do this mod on 90nm 400FSB Pentium M's and Celeron M's. You cannot tell the chipset to boot at 667mhz with any combination of pins, so you cannot clock a 533 chip to 667mhz. If you could, it would be no different than 400 ->533. Think about this - you take a 1.7ghz/400mhz and increase the FSB to 667mhz - you then have 2.26ghz. You take a 1.73ghz/533mhz chip and incrase the FSB to 667mhz, you have a 2.16ghz chip, basically the same thing.

If someone could figure out how to signal 667mhz to an i915, which it does support... Yonah runs just fine on the i915 according to my contact at Intel, but that would require a bios update and Im not sure if this functionality is enabled by default. But if its not, and the system boots up normally with a 667mhz bus, then all the bus deviders should work as expected and nothing else in the system would be overclocked.

Now then, as to the quote in the quote im responding too - Yes, this is applicable to P4-M chips too. Since all of these chips (core duo, p4, pentium M) use the same electrical bus, these pins are in the same place or very close to the same place on all of these chips. you would just need to look up exactly where they are and what combination of hi-lo you need to get the bus speed you want, and just short the pins to a ground or vcc pin to get it. (ie, if you want BSEL0 to be 0, ground it... if you want BSEL0 to be 1, short it with a VCC pin)

Now to the fun part . . .
Since my last post more than a week ago . . .
My overclocked R51e will still live and well.
It's overclocked but not overcooked.

I was dead worry I might cook my notebook . . .
so after search here & there
found here this utility from this forum called
Thinkpad T43 Fan Control Utility.

from the read outs . . . under normal operation CPU is at 56 degrees Celsius.

When playing Battlefield 2, CPU tempt is about 68ish.
The X200m GPU goes up to 70 something . . .
& that's hot . . .

So my recommendation . . .
Thinkpad's original Power Manager is fine and good at handling the heat even after overclocking.

But if you do intense gaming . . .
Get the utility above . . . set the fan to 5,000 rpm and keep the notebook cool. Too much heat may shorten component life (but gosh no one knows for sure by how much).

If you doing photoshop, internet, mail client, msn etc etc
you needn't worry.

Is anyone able to supply information about normal operation temperature of their R51e or R52?


Thanks in advance.
Hope the information help.
And bless the guy who made the utility above . . . absolutely wonderful when used in conjunction with overclocking.


PizzaHut!

[basscleff]

just curious, do you have to remove any pins from the cpu itself, or do they fit (with a little finesse) in the socket with the jumper installed?

any idea what a P4M 1800MHz would overclock to?
thx