Guide to RAM Look-Up Tables and Timing Information
Guide to RAM Look-Up Tables and Timing Information
Yes, that's correct. CCT refers to the speed or delay of data traveling between RAM, the controller, and the processor. The actual performance metric is often expressed in MHz or CAS latency, or in terms of MegaTransfers per clock cycle. For a RAM rated at 3000MHz with a CL15 (CLK per cycle) of 15, the "True Speed" would indeed be around 10 nanoseconds per response/delay.
You grasp the concept; you're using the full speed for all tasks when it shouldn't be. It really matters only for the specific timing shown on the Sticker Sheet. The timings listed {CL - tRCD - tRP - tRAS} represent various actions tied to reading data from RAM. These are typically the most frequent ones, though many hidden options exist under the OC menu. CL stands for CAS Latency, which is just one of several subtimings. Many manufacturers label these as 4x common values, but there are far more details beyond what's visible for simplicity.
CL measures how quickly the system can access a memory cell, expressed in clock cycles rather than absolute time. This is often referred to as clock ticks. The speed at which you clock your RAM influences the interval between each tick—this determines the base time between actions. A lookup table helps convert these numbers into meaningful latency values using standard units.
CAS Latency refers to the delay in nanoseconds needed to read the first bit from DRAM. T RCD stands for Row Address to Column Address Delay, another timing factor that can vary based on manufacturer settings or manual adjustments. These delays impact how quickly data is fetched across memory rows.
Tuning these parameters is challenging because it requires extensive testing to ensure stability. For example, if your RAM runs at 3,000 MT/s and CL timing is set to 15, the "True Speed" for that operation would be about 10 ns. However, this applies only to CL; changing T RCD changes the required time to 10.67 ns. Understanding these values helps optimize performance, though it demands significant effort.