Cheapest 64GB RAM ranked by price per GB

64GB RAM: for editing, virtual machines and serious multitasking

64GB is where memory stops being about comfort and starts being about workload: 4K and 8K video timelines, several virtual machines at once, large CAD assemblies, compiling big codebases, or a home lab server. The 206 64GB kits and modules above are ranked by price per gigabyte, from £1.41/GB to £63.60/GB with a median of £14.35/GB; the cheapest right now is Dell 64 GB Certified Memory Module DDR4 LRDIMM 2666Mhz 4Rx4, 0A9781930… at £90.00.

Layouts: 2x32GB, 4x16GB or a single 64GB stick

• 2x32GB is the recommended layout on any current board: dual channel, two slots free, and on DDR5 it avoids the speed penalty that four sticks often bring.
• 4x16GB is often the cheapest way to 64GB on DDR4 and works well there; on DDR5 expect to run below the rated speed.
• 1x64GB modules are mostly server RDIMMs or DDR5 workstation parts; a single 64GB consumer UDIMM is rare and is listed here when sellers offer one.
• 2x48GB (96GB) DDR5 kits are worth comparing if 64GB is marginal; they are frequently priced close to 2x32GB per gigabyte.

Platform notes

Every AM4 and AM5 board and every recent Intel board supports 64GB in two slots, but check the maximum module size in the manual for older boards: many DDR4 boards from before 2018 top out at 16GB per slot. Laptops with two slots reach 64GB with 2x32GB SO-DIMMs, and that kit is also the ceiling for the 2018 Mac mini on the Mac page. Workstations that need error correction should filter for ECC on this page or go straight to the server page, where 64GB DDR4 RDIMMs are a mainstay of the used market and some of the lowest £/GB on the site.

At this size the speed step matters less than stability: a 2x32GB DDR5-5600 or 6000 kit, or DDR4-3200, is the sensible buy, and running XMP or EXPO on a fully loaded board is where memory testing pays off. Prices rose steeply through 2026 at the larger capacities in particular, because 32GB and 64GB modules use the newest, densest DRAM dies that AI accelerators also compete for; the price-history graph on each product page shows whether today's price is a real low. If your workload fits in 32GB with room to spare, the 32GB page is where the value is; if it does not fit in 64GB, 128GB is the next step and usually a four-slot job.