is this ddr3 or ddr4?

[maenabughazaleh]

Lenovo thinkcentre E73
Intel Core i7-4790S Processor
8M Cache, up to 4.00 GHz
NVIDIA Quadro K620
Ram 8G
HDD 500G


thank you

 

[vapour]

https://ark.intel.com/products/80808/Intel-Core-i7-4790S-Processor-8M-Cache-up-to-4-00-GHz-

ddr3/ddr3L