Can I mix parts with different CL (CAS latency) ratings? What should the motherboard settings be?
Yes, you can mix parts with different CL (also written as CL=) ratings. For example, you can mix CL2 with CL3, CL2.5 with CL3, and CL3 with CL4, etc. However, when you use parts with mixed CLs, your motherboard automatically detects and sets the memory timings to the slowest common setting. For instance, if you are using CL2 and CL3, the faster CAS latency (CL2) will operate at the slower CAS latency setting (CL3).