Question 8gb actually installed, 2.2gb available

[Marcos_6a]

I used to have 8gb of ddr3 memory in my setup. I just bought some newer faster ddr3 ram, switched it out, now it (speccy) recognizes that there are two 4gb memory modules (8gb total) connected to the motherboard, but windows says there are only 4gb installed and 2.2gb usable.
what did i do wrong??

https://imgur.com/a/JHmuhgD

View: https://imgur.com/gallery/JHmuhgD

 

[Calvin7]

You didn't set memory clock speed, memory timings, DRAM voltage. It also appears you bought Single modules (F3-14900CL9-4GBX) which have no guarantee to be compatible if used in multiples.