I am looking to upgrade the cpu’s on my Dell precision T7810. Both of them prices same in Aliexpress. $16. Budget max $20usd per cpu.

I am leaning towards 2680v4 due to less power TDP of 120W vs 145W. Would like to know the opinion from the community. I will be mostly using this machine as proxmox VM and TruNAS with 2x 6TB drives.

I am also a bit confused if my DDR4 2133 memory will work with this v4 cpu since it says 2400mhz for this cpu. Can it work with 2133mhz memory?