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Model: VENGEANCE PRO 32GB (2PK x 16GB) 3600MHz DDR4 C18 DIMM Desktop Memory with RGB lighting
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At this point I'm not convinced that there's going to be a measurable difference between CL18 and CL16 at these speeds. At 1800 MHz CL18 results in 10ns of latency. At CL16 it's 8.9ns. But modern PCs are so fast already, and there are enough other interactions that introduce latency that I think you'd be hard pressed to see a difference in real world use. I have CL18 DDR4-4000, but my Ryzen 5600x couldn't do 2000 all clocks, so I did some very simple memory benchmarking (AIDA64) to see see what combination of FCLK and MCLK gave the best performance. The best numbers were always with matching FCLK and MCLK settings, but even after tweaking CAS latency settings along with other timings the difference was between 67ns and 71ns of total memory latency. Having mis-matched FCLK and MCLK speeds resulted in very slightly worse numbers overall, and a max total latency of about 77ns.
The last time I saw extensive benchmarks on the benefits of low CAS latency timings was about 20 years ago, and even then the difference was quite small. I doubt that in modern use you will see a measurable improvement in FPS, compile times, transcode times, etc. It probably only makes a difference when measuring e-peen or if you are doing extreme over clocking.
EDIT: and I quoted the wrong guy and can't fix it because I'm on mobile.
Last edited by goibhniu August 27, 2021 at 03:52 PM.
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The last time I saw extensive benchmarks on the benefits of low CAS latency timings was about 20 years ago, and even then the difference was quite small. I doubt that in modern use you will see a measurable improvement in FPS, compile times, transcode times, etc. It probably only makes a difference when measuring e-peen or if you are doing extreme over clocking.
EDIT: and I quoted the wrong guy and can't fix it because I'm on mobile.
https://www.bestbuy.com/site/cors...Id=64492
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