256GB of dual-channel RAM hits mass market thanks to Origin Code — quad-rank CUDIMM packs 128GB of DDR5-8000 into a single module

256GB of dual-channel RAM hits mass market thanks to Origin Code — quad-rank CUDIMM packs 128GB of DDR5-8000 into a single module

Origin Code showcased a standard 4R CUDIMM memory kit on a Gigabyte Z890 Aorus Elite Duo X with a Core Ultra 7 270K Plus processor. The 256GB (2x128GB) DDR5-8000 memory kit had relaxed 64-63-63-128 memory timings, which is entirely expected given that the modules run at 1.1V DRAM voltage. Notably, Origin Code has a flagship version that's geared toward enthusiasts and professionals who demand the absolute best in performance. The premium DDR5-8000 memory has much tighter memory timings, 42-57-57-108, but requires 1.4V.

(Image credit: Origin Code) (Image credit: Origin Code) (Image credit: Origin Code) (Image credit: Origin Code) The emergence of consumer quad-rank DDR5 memory kits isn't a coincidence but the result of the introduction of CUDIMMs, memory modules equipped with a client clock driver (CKD). Just as the CKD enables memory modules to reach very high frequencies, the chip also enhances the stability of quad-rank memory, which uses four banks of memory chips. Running a large amount of memory puts excessive stress on a processor, which is why quad-rank memory didn't exist before for everyday users until the arrival of CUDIMMs.

Origin Code won’t be the only memory vendor to offer quad-rank CUDIMM memory kits. For instance, Adata had already partnered with MSI to demonstrate quad-rank CUDIMM functionality several months ago, showcasing modules running at DDR5-5600 speeds. It’s reasonable to expect that additional brands will soon jump on the quad-rank CUDIMM bandwagon.

So far, demonstrations from Origin Code with Gigabyte and Adata with MSI all share one common factor: Intel's Z890 platform. It is reasonable to speculate that quad-rank CUDIMMs will likely not work on AMD's current platform since it hasn't fully embraced CUDIMMs. The chipmaker has confirmed that the AM5 socket supports CUDIMMs, but never said when the feature will arrive. However, the current speculation is that full CUDIMM support could arrive with Zen 6.

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