L410: QUESTION: on upgrading the processor

I know that updates not covered by the warranty; but my question is more specific. I have acquired several portable Thinkpad L410, all specced the same; Celeron T3000 2 GB of RAM and 160 GB HDD and BIOS to version 1.40.

I intended to rehabilitate a couple and improve processors.

My first attempt was to put a T7500 Penryn in one unit, booted up and went to check the bios settings... all the goo - recognized T7500. Saved and restarted but system stopped and said you need a different firmware. Not now, not knowing why I tried, I took the T7500 and put in a [obviously a more recent than the T7500 cpu] T6570 RESTARTED AND is GONE IN BIOS - recognized T6570. Saved and rebooted and this time continued, started in Windows Mobile. Running again the W.E.R. ANrating went after looks good and still being run like a champ.

My question is; Why laptop request a different microcode for a T7500 and hold on to this moment there, still recognize and run with the cpu T6570 which is newer than the T6570 that does not need a different firmware? I checked the system update is an update of the bios to 1.45... but the already installed 1.40 is dated 6/08/2010...so why wouldn't the bios have the microcode for a T7500?

Well, for starters, T7500 is not a Penryn processor - that's a Merom. That is why the different microcode.

The original T3000 also belongs to the Penryn family.

Seems simple enough for me.

Tags: ThinkPad Notebooks

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