3600MHZ CL16 or 3800MHZ CL18 compatible with 5800X3D
3600MHZ CL16 or 3800MHZ CL18 compatible with 5800X3D
Considering the specs, you're weighing options between 3800MHZ CL18 (9.47 latency) and 3600MHZ CL16 (8.88 latency), noting the 200MHZ improvement in the latter.
3800 CL18 should run quicker with a higher FCLK clock—raising it to 1900MHz won’t automatically help unless you do it yourself. For example, 3800 CL16 performs noticeably better than 3600 CL14 on AM4 boards because of the increased FCLK, and this gap is more pronounced than with the models you mentioned. However, the main goal of the 5800X3D is to minimize memory impact, so real-world performance differences will likely be minimal. It probably makes more sense to opt for a budget 3200 CL16 instead.
Most plastic heatspreader rams are one-sided, so it’s best to avoid them. They often come with generic ICs for standard bins like 3200c16 or 3600c18/16. OEM bare PCBs are significantly cheaper and allow you to choose the best ICs and settings. My pick is double-sided rams with solid ICs—they’re more reliable now, and you won’t find double-sided sticks for 8GB or 16GB anymore. The quad stick quad rank works because lower-density ICs usually offer better timing, especially for TRFC. You can still run dual 16 channels at around 500TRC instead of the higher limits some claim, and 16Gb ICs are even more efficient but require more than 600TRC. So you save money by using OEM bare PCBs while getting better performance and simpler overclocking.
It's clear the main change is a slightly better latency and a more responsive feel. I'm still using the overclock since it works fine and doesn't cause any issues.
I think eBay prices aren't great because in my country I can find them for around 12 dollars. I've seen similar listings on FB Marketplace with very low prices, but you'll need to search carefully. It seems the local market might be more competitive for high-performance rams.