Processor upgrade for Sony VAIO VPCEH1J1E?

[atherixrs]

I've found my old laptop again. I love it. It still runs Windows 7 great (and to be honest, I think I prefer Windows 7 over Windows 10, I don't even know what extra features I'll get, or what'll be faster on Windows 10 but that's not the point of the question).
However, I'd still like to upgrade it to make it faster, as fast as it can go preferably.
What CPU options are available to me with this model?
Is it upgradable?
Will I need any thermal paste or anything of the sort, or can I just plug it in using my hands and a screwdriver?

 

[LeStrata]

I got the same laptop, and im also trying to figure out if it is possible to change the cpu.

I have already put more RAM in it, so it now got 8gb.
I have also changed the HDD to a 512gb SSD.

And I have installed "Linux Mint" alongside Windows 10, so I can choose at boot which one I want to start. Linux Mint runs much smoother and the cooling fan doesn't spin all the time like in Win10.

Oh and another thing that might improve the performance of the laptop is by removing dust from the heat-sink and changing the old thermal paste, (as it is quit possible that it might have dried out) and as a result the CPU overheats and the computer throttle down the CPU to protect the computer. (I haven't changed the thermal paste myself yet.)

Some CPU's are soldered to the motherboard and are therefore not changeable. But according to a SONY service/repair manual, the CPU in the VPCEH-series are not soldered to the board.
https/www.manualslib.com/manual/686993/Sony-Vaio-Vpceh-Series.html?page=13#manual

The VPCEH1J1E comes with a Intel Pentium B940 CPU, and it fits in a G2 (PGA988B) socket.
Here is a list of other CPU's that will fit in that socket:
http://www.cpu-upgrade.com/CPUs/Intel/Pentium_Dual-Core_Mobile/B940.html#sspec

But as far as I can understand, just because a CPU can fit in the same socket that dosn't mean the computer will boot with it, fx. the bios also need to be compatible with the CPU....

But according to this benchmark site it looks like some have run the benchmark on the VPCEH1J1E fitted with a "Core i5-2520M" and the "Core i5-2450M".
https://www.userbenchmark.com/System/Sony-VPCEH1J1E/10881

And btw you will need thermal paste to apply between a CPU and the heat sink.

Well that is what I have figured out until now....

 

[LeStrata]

I have decided to take the chance, and ordered a used
i5 2520M on ebay.
I should receive it within 14 days.

I will return and tell if it works.

 

[LeStrata]

I received the 2520M CPU, took the laptop apart, cleaned the heatsink and put the CPU into the socket.
I thought I had some thermal paste laying around, but I didn't...
So I used a thermal pad as a temporary solution for the CPU.

Turned on the laptop, and it worked flawlessly.

When I started a game the CPU got above 90 Celsius and the CPU where automatic throttled down and the game became unplayable.

I have been looking around and have seen several VPCEH laptops for sale with a i7 2620M
CPU so I guess that also is a option, the 2620M is more expensive thou.