I'm looking to upgrade my T440p Thinkpad to 16GB (2x 8GB Sodimm DDR3L). I only use the laptop for work, where sometimes I have to run tests that use a lot of memory (my 2x4GB RAM now is not enough as it frequently maxed out).

My question is: should I get the cheapest 1600MHz RAM I could find for the upgrade (so far I found Crucial/Samsung/Hynix 8GB for RM95 from Shopee), or spend extra money on RAM with higher MHz (this laptop supports up to 2133Mhz) or lower CAS latency (e.g. HyperX Impact with CL9 latency)? Is spending extra on RAM worth it if you don't play games?