I'm building my first high-end PC for gaming and video editing in After Effects and Premiere Pro. The build includes a Ryzen 7 9800X3D, MSI MAG B850 TOMAHAWK MAX WIFI, Samsung 990 Pro 2TB SSD, and an RTX 5070 Ti. I'm trying to find sensible places to save money, especially on the memory and motherboard.
For 64GB of DDR5-6000 memory, is CL30 noticeably better than CL36 with the 9800X3D? The CL30 kits I've been considering cost nearly $1,000 more than the available CL28 or CL36 options, so I'm wondering whether the difference is actually visible in gaming or video editing.
How important is it to use AMD EXPO instead of Intel XMP, particularly with a CL36 kit? Also, is the B850 TOMAHAWK MAX overkill for this processor, or is it a reasonable choice?
4 Answers
The motherboard looks like a reasonable match rather than an obvious problem. You don’t need an extremely expensive board just for the 9800X3D, though, so compare its features with cheaper B850 options and keep it only if you need its connectivity, expansion, networking, or power-delivery features. Also, because your workload includes Premiere Pro and After Effects, make sure the CPU choice still fits your priorities—some non-X3D processors can be faster for heavily threaded editing, while the 9800X3D is especially strong for gaming.
With a 9800X3D, the difference between DDR5-6000 CL30 and CL36 is extremely small in real-world gaming—usually around 0–2%, and often impossible to notice. The large 3D V-Cache reduces how much the CPU depends on memory latency, so CL36 is perfectly reasonable if it saves a substantial amount of money.
EXPO is the memory profile designed around AMD systems, while XMP was originally designed for Intel platforms. An EXPO kit is the easiest choice on AM5 because the advertised speed and timings are intended for Ryzen, but a good XMP kit can still work perfectly if the motherboard supports it. Just remember to enable the profile in the BIOS; otherwise the memory may run at its slow default settings.
At DDR5-6000, CL36 works out to about 12ns of first-access latency, while CL28 is roughly 9.3ns. That sounds significant on paper, but the practical impact is tiny with this processor. For video editing, memory capacity and overall bandwidth matter more than shaving a few latency cycles. A cheaper 64GB kit is the sensible option here.
You could also try tightening the timings manually later, but I wouldn’t pay a huge premium expecting a noticeable performance improvement.