clocking the motherbaord

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larryb · #1 Post by **larryb** » Tue Apr 03, 2007 6:29 pm

Does anyone know how to reclock the motherboard on T20, T21?
I tried placing a 900Mhz cpu on a 700Mhz T20. At first the bios only recorded 700Mhz and all benchmark programs indicated 698 - 700Mhz cPu operation.

I then flashed the bios with a latest version and now the Bios will reconize the 900Mhz cpu but stil only operate at 700Mhz.

IBM spec's on the T20 motherboard was only for 700Mhz cpu's, and T21 motherboards for 750 - 850Mhz cpu speeds.

Does anyone know how to modify the motherboard to kick up the external clock to make the 900Mhz Cpu work on a T20 motherbaord?

Larry

truk · #2 Post by **truk** » Tue Apr 03, 2007 11:05 pm

I am NOT going to recommend this, but I will tell you that you will need to edit the BIOS to do such a thing. If I am correct the T20s use a Phoenix BIOS. You might be able to get this to work using the Phoenix BIOS editor (never seen it, only heard of it, probably can find it with a little time and Google). Still, you must remember, with this type of tuff it is EASY to kill equipment, and I don't mean that you pop in a BIOS savior and retry...

Hope this helps, and good luck!
Truk

larryb · #3 Post by **larryb** » Wed Apr 04, 2007 4:46 pm

Thanks for the reply.
I know about the problems with reclocking using the BIOS.

Since I can't find a schematic, I as hoping that maybe there was a simple jumper on the PPL circuit that would kick up the onboard osc to make the 900Mhz work.

Now i have read that the 1Ghz, SL53S will work on any T2x board at 1Ghz.

I have asked and posted to try to get a confirmation that it will work on a 700Mhz T20 mb before I purchase one.

Thanks for the info.

Larry

al7kz · #4 Post by **al7kz** » Thu Apr 05, 2007 2:23 pm

larryb · #5 Post by **larryb** » Thu Apr 05, 2007 8:23 pm

Where do I set up the speedstep. I didnt see it in the BIOS setup. I do have it set for MAX operation on AC connection.

Maybe I'm overlooking something

Larry

al7kz · #6 Post by **al7kz** » Thu Apr 05, 2007 9:54 pm

larryb · #7 Post by **larryb** » Thu Apr 05, 2007 10:08 pm

I dont want to seem like the dullest crayon in the box, but i got the bios figure out, but the thinkpad configuration thing is got me puzzled

So you have it set for max performance in the BIOS, but then you go toThinkpad Configuration>Power Management>Intel Speedstep, and set it for max performance on AC.

Is that a windows xp program or a utility that I dont know where the heck it is

Larry

BruceDickinson · #8 Post by **BruceDickinson** » Thu Apr 05, 2007 10:52 pm

The following links *might* be of help.

http://forum.rightmark.org/post.cgi?id=post:6:720:0

http://www.twistedforums.com/forums/sho ... hp?t=10133

Good luck.

al7kz · #9 Post by **al7kz** » Thu Apr 05, 2007 11:44 pm

hope someone else can help...

larryb · #10 Post by **larryb** » Fri Apr 06, 2007 5:24 pm

Thanks for this link. ther is a wealth of info and drivers for the Thinkpads.

If you dont mind I want to post this link for others

Larry

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