RAM upgrade in Dell R710

Hello,

I recently acquired a used Dell R710 from a small business in town. I found that the server only had one processor (Xeon 5530) and 12G DDR3 RAM (6 x 2GB 2Rx8 PC3-8500E-7-10-e0). I was looking into upgrading the RAM on that machine.

Going through EBay, I found people selling DDR3 but the trailing numbers after clock speeds (i.e., latency) is different.

This is what I am getting on EBay: 4GB 4Rx8 PC3-8500R-7-10-H0.

Please help me decide if I can upgrade the system from "2GB 2Rx8 PC3-8500E-7-10-e0" memory to "4GB 4Rx8 PC3-8500R-7-10-H0" memory.

My main purpose for this build will be high performance computing like building neural nets and AI. At the same time I am also looking to buy another Xeon 5300 to go in the 2nd socket that is empty.

Please help me decide if I can replace the RAM and suggest the maximum amount of RAM I can place in the system(my research says 288GB).
Help Appreciated
Many thanks.