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Thinkpad T420 and I7 3840QM

Posted: Mon May 28, 2018 9:13 am
by Lean15
Hello! I'd like to know, if i mod the bios of my T420, will it be able to take the i7 3840QM Ivy Bridge CPU ? I can get it for pretty cheap if it could work.

Re: Thinkpad T420 and I7 3840QM

Posted: Mon May 28, 2018 9:50 am
by RealBlackStuff

Re: Thinkpad T420 and I7 3840QM

Posted: Mon May 28, 2018 10:20 am
by Lean15
RealBlackStuff wrote:
Mon May 28, 2018 9:50 am
Welcome to the Forum.
See this: https://forum.thinkpads.com/viewtopic.php?t=122907
I tried the CPU. Turned on, some LEDs lit up, but no display.

Re: Thinkpad T420 and I7 3840QM

Posted: Mon May 28, 2018 2:54 pm
by thinkpadcollection
Rephrase the question to Sandy bridge quad (Core i7-2820QM) for T420 and see what answers says?

Cheers, thinkpadcollection

Re: Thinkpad T420 and I7 3840QM

Posted: Mon May 28, 2018 3:51 pm
by RealBlackStuff
Did you apply Coreboot first?

Re: Thinkpad T420 and I7 3840QM

Posted: Tue May 29, 2018 10:50 am
by Lean15
RealBlackStuff wrote:
Mon May 28, 2018 3:51 pm
Did you apply Coreboot first?
No, im just asking will it work, cause i've only seen people try the I7 36xx and 37xx, not 38xx. yes, i have tried to search for the 3840QM

Re: Thinkpad T420 and I7 3840QM

Posted: Tue May 29, 2018 10:53 am
by Lean15
The T430 has seen 3840QM mods tho.

Re: Thinkpad T420 and I7 3840QM

Posted: Fri Jun 15, 2018 1:03 am
by jaspen-meyer
If you have coreboot , the machine will run with the 3840QM. But, I'm not sure if it will overheat. My 3630QM does not overheat but it may throttle, cpu temps reach 90C under extended load, >20minutes.