Kingston
DDR5 · 5600 MT/s · CL46 · 1×32GB
Lowest price in GB across retailers
Among Kingston's ECC UDIMM options, 5600 MT/s is the faster of the two speed grades this line covers, paired with CL46 — a UDIMM that still needs a board and CPU pairing that actually enables ECC checking, since the module works as plain non-ECC memory otherwise, with no warning that it's doing so.
This one is 1×32GB, 32GB. Because there's no register chip between the module and the memory controller, it fits a standard UDIMM slot on any board that takes DDR5 — the ECC function is the part that needs specific platform support, not the physical fit.
Confirm ECC UDIMM support in the motherboard's own documentation rather than assuming the socket accepting the module means ECC is active.
Flare X5 is a heatspreader-only DDR5-6000 line built for clearance-constrained builds, and within this 6000 MT/s grade every listing shares that one headline speed — the CL bin and capacity are the only things actually separating listings.
FURY Beast at 6000 spans three CL grades under one name plus a four-module 64GB option its 5600 sibling doesn't offer, which makes matching the exact SKU more important here than with most families.
DDR5 doubled the bandwidth and moved power regulation onto the module. Whether that is worth paying for depends entirely on which platform you are building.
Crucial Pro trades looks for a compatibility-first, overclocking-headroom pitch, and within this 6400 MT/s grade, CAS latency -- not the shared headline speed -- is the number that actually separates one listing from another.
16 GB is no longer comfortable, 32 GB is the sensible default, and 64 GB is a workload decision rather than a future-proofing one.
Capacity avoids stutter caused by running out of memory; speed affects how efficiently the CPU feeds data to the GPU. They solve different problems, and buying enough of the first one before spending on the second is the right order.