Thinkpad T420 and I7 3840QM

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Lean15 · #1 Post by **Lean15** » Mon May 28, 2018 9:13 am

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.

#2 Post by **RealBlackStuff** » Mon May 28, 2018 9:50 am

Welcome to the Forum.
See this: https://forum.thinkpads.com/viewtopic.php?t=122907

Lean15 · #3 Post by **Lean15** » Mon May 28, 2018 10:20 am

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.

thinkpadcollection · #4 Post by **thinkpadcollection** » Mon May 28, 2018 2:54 pm

Rephrase the question to Sandy bridge quad (Core i7-2820QM) for T420 and see what answers says?

Cheers, thinkpadcollection

#5 Post by **RealBlackStuff** » Mon May 28, 2018 3:51 pm

Did you apply Coreboot first?

Lean15 · #6 Post by **Lean15** » Tue May 29, 2018 10:50 am

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

Lean15 · #7 Post by **Lean15** » Tue May 29, 2018 10:53 am

The T430 has seen 3840QM mods tho.

jaspen-meyer · #8 Post by **jaspen-meyer** » Fri Jun 15, 2018 1:03 am

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.

Thinkpad T420 and I7 3840QM

Thinkpad T420 and I7 3840QM

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