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Blue Screen Again
Posts: 1
Registered: ‎05-17-2017
Location: IN
Views: 6,363
Message 1 of 4

CPU upgrade in T540P from i5 to i7


recently purchased lenovo T540P laptops with i5-4200 configuration. need to upgrade to the latest i7 processor. is it possible to do that and what is the available option and pros and cons of doing that.


Kindly help me in this regard with a proper solution.




Community SeniorMod
Community SeniorMod
Posts: 9,376
Registered: ‎01-01-2010
Location: US
Views: 6,305
Message 2 of 4

Re: CPU upgrade in T540P from i5 to i7

Yes to i7 but no to latest.  You are limited to 4th generation processors.  The i7 CPUs used are these:







I do not respond to requests for private, one-on-one help. Your questions should be posted in the appropriate forum where they may help others as well.

If a response answers your question, please mark it as the accepted solution.

I am not an employee or agent of Lenovo.
What's DOS?
Posts: 1
Registered: ‎09-04-2017
Location: PL
Views: 5,833
Message 3 of 4

Re: CPU upgrade in T540P from i5 to i7

I have T540p with I3-4000M processor inside. Recently I bought I7-4800MQ processor with intention of replacing old one.


After switching processor I cannot start computer. When I press power button cpu fan starts to spin, hd starts working but nothing more happen.


Supplier of I7 confirms that CPU is ok. I have the latest version of bios.


Does bios have blockage of different type of CPU than it was factory installed ?

Maybe I need to set something more on motherboard ?

Community SeniorMod
Community SeniorMod
Posts: 11,881
Registered: ‎06-06-2011
Location: RU
Views: 5,798
Message 4 of 4

Re: CPU upgrade in T540P from i5 to i7

CPU should be production sample, not a pre-sale or engineering one (ES/QS processors). There are such cheaper CPUs in the after market. Legit i7-4800mq CPU should have S-spec number on the package - SR15L.

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