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Lenovo M5400 CPU upgrade
#1
Hello, i have a question about possibility to upgrade CPU in my Lenovo M5400.
Now I have i5-4200M (dual-core) and I want upgrade to i7-4712QM (or i7-4702QM) (quad-core). All CPUs has same 37 Watts TDP and it is also support by my HM87 chipset.

Some reasons makes me nervous about it:
1. My laptop has no modification with quad core i7 CPU. In hardware mantainance manual exist only dual-core CPUs.
[Image: bJL4Z.jpg]
2. My laptop have BM5 DA0BM5MB8D0 rev: D motherboard. In datasheet for this Quanta BM5 platform is written (look at processor block):
[Image: bJFVk.jpg]
(Processor : Daul Core)

Does it mean what my motherboard has no hardware support for quad-core i7 CPUs? I want to upgrade CPU but don't want to buy not working piece of silicon for ~250$.
Please, if someone knows more about it, let me know.

Link for HMM: https://download.lenovo.com/pccbbs/mobil...140314.pdf
Link for platform datasheet: https://www.dropbox.com/s/9bzwcmjt5kfqu1...A.pdf?dl=1
Link for BIOS: https://www.dropbox.com/s/mhkx3h786mq42v...0.fl1?dl=1
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#2
Post a screenshots of third (Mainboard) tab of CPU-Z.
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#3
(01-28-2017, 10:53 AM)DeathBringer Wrote: Post a screenshots of third (Mainboard) tab of CPU-Z.

http://dartvanya.pe.hu/screenshot_27530_...05b148.png
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#4
You can use at least i7-4702MQ - https://hwbot.org/submission/2945221 (press XTU Hardware)
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#5
(01-28-2017, 11:11 AM)DeathBringer Wrote: You can use at least i7-4702MQ - https://hwbot.org/submission/2945221 (press XTU Hardware)

Wow, so interesting. Thank you for searching this info.
Can i use it without BIOS modification? And this data from Lenovo B5400, it has H86 chipset. Does it matter?
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#6
BIOS mod isn't needed.
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#7
(01-28-2017, 11:31 AM)DeathBringer Wrote: BIOS mod isn't needed.

Big thank you for you answers. I'll very likely buy 4702MQ, i think that don't really need to experiment with Haswell Refresh for 100Mhz.
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#8
I'll post here the upgrade result, when CPU comes to me.
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#9
(01-28-2017, 11:31 AM)DeathBringer Wrote: BIOS mod isn't needed.

I successfully upgraded. All works great! Thank you for giving me confidence for upgrade.  Wink
My XTU results is here:
https://hwbot.org/submission/3509504
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#10
Hello all,

I landed on this forum as I'm in need of some magic regarding the switch from the i5 4200M to i7 4700MQ on my Lenovo M5400.

I found some machines on the interweb that are running the 4700MQ but did not receive any info regarding the BIOS.

I already attempted to swap directly but it's not posting, just some erratic fan movement. Having in mind that this proc has a higer TDP I'm guessing the motherboard needs to be instructed to allow the higher power consumption.

Attached is a link to my current BIOS and setup:

https://we.tl/t-RUXxD1NCtW

Any help would be highly appreciated.


Attached Files
.txt   dmidecode.txt (Size: 19.63 KB / Downloads: 0)
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