PHS-memory
DDR5 · 5600 MT/s · CL46 · 2×48GB
Lowest price in CA across retailers
Out of stock in CA
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PHS-memory's ECC UDIMM line is built around error-correcting DDR5, which puts it in a different category from the gaming and mainstream kits most of this site lists — ECC trades a little overhead for the ability to detect and correct single-bit memory errors, more relevant to workstations than a gaming rig.
The family covers two speed grades and a wide capacity spread, running as 2×48GB up to 96GB depending on the listing you pick. Because this is ECC, it will only function as ECC on a board and CPU combination that actually supports error correction; a standard consumer gaming board won't report it as ECC even if the module physically fits the UDIMM slot.
Confirm your platform's ECC support before ordering, since the slot itself won't stop you from buying the wrong part for a non-ECC board.
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.
CAMM2 and SODIMM are physically incompatible laptop memory formats. The difference is not speed at a given rating but how many channels each module carries, how the module attaches, and whether a machine can ever add memory rather than replace it.
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.