These are the first DDR5 64GB memory modules available—what capabilities can they offer?
These are the first DDR5 64GB memory modules available—what capabilities can they offer?
It's a RAM series model, lacking EXPO details. Operating at 1.1V limits it to 6400MHz and its Trc latency is quite poor. Kingston ValueRAM CUDIMM 64GB, DDR5-6400, CL52-52-52, on-die ECC, CKD. Despite this, higher voltage seems to improve performance. The main concern is why these were released without EXPO or higher frequency/voltage options. Is it due to lack of demand from gamers and overclockers, or because users simply prefer it? Have any tests been done on AM5? Since they're CUDIMM modules, pass-through support in BIOS should exist, but the next question is whether it functions properly with Zen5 or only in "limp-mode" at reduced speeds like 4800MHz. Interestingly, Crucial offers a similar product as an UDIMM (no clock regeneration on the stick) but at a lower frequency and slightly better Trc latency. Crucial Pro DIMM Kit 128GB, DDR5-5600, CL46-45-45, includes SO-DIMM version with identical features. Even though new, these are reasonably priced under €3 per GB...
I purchased four units, hoping they'd arrive soon, but I've read about their proper function at 4800MHz on AM5. It's worth noting they're compatible only with Zen 5, not Zen 4—this is normal when using four of them. With just a couple, they should handle faster speeds without too many problems.
Creating these JEDEC specifications is significantly simpler. Since memory makers haven't had time to test newer OC profiles, they haven't finalized one yet. This pattern follows every new memory chip release—JEDEC kits are developed months ahead of faster models. Whether it performs well under overclocking remains uncertain, but that uncertainty stems more from Micron's involvement than the fact it's a 32Gb IC.