T420 & T430 CPU and RAM Upgrade

[Dabman]

Hei. I have T420 and T430 which i want use as two backups
I'm considering upgrade both of them (T420 wit macos high sierra as backup of my macbook) and T430 for backup of my regulat pc (device running VMs)

I have seen that T420 after modding BIOS can handle 2x 8GB 1600MHz ram (is not any possibility to run 2x 16? or DDR3L instead of regular DDR3?)
and also i7 4core (qm), but now i really do not have any clue which i7 i can install
i7 2670QM or 2820QM, or is any other better option? I have also few SSD intel 530 which i wish to instal in raid0 (is any possibility to use DVD rom BAY as second SSD and combine them in raid0 - is it worth?)

Same question about T430, what ammount of RAM can i use? and which i7?


I was considering to use T430 as Macbook Pro backup but finally i have seen that is less problem with T420, one minus that T420 does not have USB3.0 but this can be fixed by express card for 10$.

(I have needed required to flash T430 bios)

[DeathBringer]

Post screenshots of first (CPU) & third (Mainboard) tabs of CPU-Z with current CPUs from two systems.
How many memory slots these laptops have?

[Dabman]

Post screenshots of first (CPU) & third (Mainboard) tabs of CPU-Z with current CPUs from two systems.
How many memory slots these laptops have?

Here U go
https://epnjya.db.files.1drv.com/y4mXlEA...7wzMWYVcCQ
https://epnkya.db.files.1drv.com/y4m-v2O...7tN9PhW3pw

[DeathBringer]

This is not all the information I requested.