A DDR5 kit listing looks like this: 32GB (2 x 16GB) DDR5-6000 CL30, AMD EXPO. Four numbers decide whether it is the right kit for your build. This guide explains each one in plain terms.
Capacity and kit layout
32GB as 2 x 16GB is the sensible default for gaming and general use in 2026. 64GB as 2 x 32GB suits video editing, large photo libraries and running virtual machines. Buy two sticks, not four. Current AMD and Intel boards run two sticks at full speed and often drop speed with four sticks installed.
Speed: the number after DDR5
DDR5-6000 means 6,000 million transfers per second. Higher is faster, but only up to the point your CPU's memory controller can match it:
- AMD Ryzen 7000 and 9000: DDR5-6000 is the sweet spot. Kits rated at 6400 or above often force a 2:1 controller ratio and end up slower in games.
- Intel Core 13th, 14th gen and Core Ultra: these handle DDR5-6400 to 7200 comfortably on Z-series boards. B-series boards have lower limits, so check the board's memory QVL.
CL: the latency number
CL30 means the memory takes 30 clock cycles to respond to a request. Lower is better at the same speed. A DDR5-6000 CL30 kit is quicker than a DDR5-6000 CL36 kit even though the headline speed is identical. When comparing kits at different speeds, divide CL by speed: 30/6000 and 32/6400 are nearly identical in real latency.
EXPO vs XMP
Out of the box, every DDR5 kit runs at a conservative default, usually 4800 or 5600. The rated speed is stored in a profile you switch on in the BIOS. EXPO is AMD's profile format. XMP is Intel's. Most kits carry both, but a kit that lists only XMP will still work on an AMD board; the board applies the XMP timings instead. If a listing says EXPO, it was tuned with Ryzen in mind.
RGB, height and clearance
RGB kits are taller. A kit like the Corsair Vengeance RGB stands about 56mm, and some large air coolers overhang the first memory slot. If you are using a tower cooler, check its listed memory clearance. All-in-one liquid coolers avoid the issue.
Which kit to pick
| Build | Kit |
|---|---|
| Ryzen 7000 or 9000 gaming PC | 32GB (2 x 16GB) DDR5-6000 CL30 with EXPO |
| Ryzen creator PC | 64GB (2 x 32GB) DDR5-6000 CL30 with EXPO |
| Intel Core Ultra or 14th gen gaming PC | 32GB (2 x 16GB) DDR5-6400 to 7200 CL32 to CL34 with XMP |
| Budget build on a B-series board | 32GB (2 x 16GB) DDR5-5600 CL36 |
Two mistakes to avoid
- Forgetting to enable the profile. If your new kit benchmarks slowly, open the BIOS and turn on EXPO or XMP. It is off by default.
- Mixing kits. Two identical-looking kits bought separately are not guaranteed to run together at rated speed. Buy the full capacity you want as one kit.
Memory listings on KERNOVIQ show speed, latency, kit layout and profile support in the specification table so you can match a kit to your CPU without guesswork.