I'm thinking of adding RAM to my XPS 8920 computer. According to CPU-z the OEM RAM installed is a pair of Samsung DDR4 -2400 RAM with a CL of 17. On eBay I can either purchase the same RAM with a CL of 17 or a couple of no name  brands with a CL of 15 for the same price. Will the lower latency make much (any) difference? Or am I better off buying the same RAM that's in the other two slots?