Member Avatar for Tinki

hi all,
i've had my laptop a while and my processor died on me, had it replaced with slower one since the lil IT shop couldn't find the exact same one like i had before. my latop is now painfully slow, i use it n all, but i'd like to get it up to at least the same speed as before. does anyone have a spare, or know where i could find one for a reasonable price (UK)... (just gona write exactly what it says on the old processor)
RH80536 750
7526B115 SL7S9
1.86/2M/533
INTEL '04
thanks for the help :)
o.

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  • Latest Post Latest Post by PTWanderer

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Short, practical checklist to follow when hunting a correct replacement for an older laptop CPU (and what to do if a swap isn’t practical).

Start with the laptop model, not the stamped chip. Locate the official service/maintenance manual or parts list for that exact model and check whether the processor is socketed or permanently soldered. The manual also shows the vendor spare (FRU) numbers and any BIOS/firmware notes that determine which processors the board will accept.

When buying a used chip or donor board, ask the seller for clear photos of the item installed in a working machine or of the chip’s top and underside, a short test video, and a return window. A whole donor laptop or a motherboard with the CPU fitted is often a safer buy than a loose chip. Confirm shipping to the UK, verified working condition, and a tested-by-seller statement before paying.

Installation and testing: take ESD precautions, clean and reapply thermal compound, reseat the heatsink correctly, power on and check that the BIOS/UEFI detects the CPU, and run a short stability/temperature check before doing heavy work. If the board doesn’t boot, check for BIOS updates and the vendor’s CPU support notes—some older boards will not accept certain revisions even when the package looks identical.

If sourcing the exact chip proves expensive or risky, consider alternatives that give bigger real-world speed gains: an SSD, more RAM (if the board supports it), or a fresh OS install. If the original part turns up cheaply, the offers from members here ( and ) are useful; otherwise follow the checklist above and prioritise a tested seller or a donor machine.

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All 7 Replies

Member Avatar for caperjack

i think you mean 478 pin ,the make and model # of the laptop might help better than just the info on the chip

Member Avatar for willcomp

Socket 479 was used for Pentium M (mobile) CPUs. So 479 pins is correct.

CPU is a 1.86GHz Pentium M 750 CPU. They are out of production, so eBay will be your best bet. Search for Pentium M 750 or Centrino 750 (same CPU).

You will need to know what CPUs your notebook supports unless you select an exact match.

Member Avatar for caperjack

Socket 479 was used for Pentium M (mobile) CPUs. So 479 pins is correct.

I learning something new everyday ,as always ,i did not know that !!
I once put a laptop cpu [might have been a s370 i forget ]in a desktop comp.not a M though,didn't know there was a difference

Member Avatar for vinmar82

hi all,
i've had my laptop a while and my processor died on me, had it replaced with slower one since the lil IT shop couldn't find the exact same one like i had before. my latop is now painfully slow, i use it n all, but i'd like to get it up to at least the same speed as before. does anyone have a spare, or know where i could find one for a reasonable price (UK)... (just gona write exactly what it says on the old processor)
RH80536 750
7526B115 SL7S9
1.86/2M/533
INTEL '04
thanks for the help :)
o.

I see you are needing something I no longer need.. I have one RH80536 750 1.86/2M/533 intel M which came out of one of my laptops when I first bought them. I replaced it with a 2.0 and only used this chip about 2 months. let me know if you are still interested in owning this.

Member Avatar for Tinki

darn it! i bought one a few days ago, but.. thanks for the offer anyway :)

Member Avatar for quixote7

vinmar82: not sure whether this or a message is the way to reach you. Just curious: are you still selling that chip? If so, I need one! Send me a message, or answer here, whatever works for you.

Member Avatar for PTWanderer

Hi, I have a Pentium M 1.86GHz 2M 533 (SL7S9)

If anyone interested please contact me at:

See ya

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