Checking RAM details for your laptop.
Checking RAM details for your laptop.
SODIMM memory issue. I have two 16GB CL16 3200 units in my Legion 5 laptop, but it's being underclocked to 2667. For gaming, should I stick with the lower-speed memory or upgrade to a Kingston CL22 3200 32GB kit? Their site says it will run at full 3200 without XMP support. Would this improve performance or hurt it? The latency concern is real. Note: My Legion 5 AMD 5800H doesn’t support XMP and I mainly use it for gaming.
No, it will not run at 3200 without XMP / DOCP. the website is lying. AMD uses a different name for XMP, they use it DOCP or something similar to that name. If the BIOS doesn't have options to configure the frequency manually or through some profiles, then you're stuck with 2666 Mhz. Without bios options, maybe you could find some overclocking utility to overclock the ram on the fly, from within Windows, but no guarantee it would work right.
Considering purchasing another 16GB Samsung stick with 3200Mhz, similar to the Kingston option you evaluated, could be a viable alternative. Replacing the OEM memory due to its lower CL rating and aiming for 32GB might work if performance remains consistent.
The CL value and latency aren’t constant figures. You achieve CL22 at 3200 Mhz, but if the memory is set to a different speed, the latency might shift. For instance, the same stick might require CL20 at 3000 Mhz or CL18 at 2666 Mhz. Generally, higher frequencies mean the memory chips take longer to respond when you read or write data. This explains what CL stands for. Your laptop’s BIOS can restrict RAM performance at lower speeds—possibly for power efficiency, cooling, or low power usage. It might also just omit advanced settings to keep things simpler. XMP/DOCP act as presets; each tells the BIOS the stick can operate at a specific frequency with certain voltage and other settings. The stick could support presets like 2400, 2666, 3000, or 3200 Mhz. If the BIOS enables XMP/DOCP, it evaluates these options and selects the safest one. If not, it uses a default preset that works with any memory. Tools such as CPU-Z or Aida64 can reveal these available frequencies for your RAM sticks.