SK hynix HMCG94AGBRA is the 64GB DDR5-5600 ECC RDIMM (2Rx4, CL46, 1.1V) that OEMs including Supermicro qualify under their own part number MEM-DR564MC-ER56. With DDR5-5600 now the mainstream speed for current Xeon 6 and EPYC 9005 builds, this part number is one of the most requested lines on the broker market. HGCHIPS stocks the HMCG94AGBRA family (suffix variants 177N / 181N / 184N etc. are internal SK hynix identifiers — we match your BOM exactly) with per-lot functional testing and 24-hour quotes.
| Manufacturer | SK hynix |
|---|---|
| Part number | HMCG94AGBRA (suffix variants: HMCG94AGBRA###N) |
| Memory technology | DDR5 SDRAM |
| Capacity | 64GB |
| Data rate | 5600 MT/s (PC5-44800) |
| CAS latency | CL46 |
| Module type | RDIMM (Registered ECC) |
| Rank / organization | 2Rx4 (dual-rank x4) |
| Voltage | 1.1V |
| Form factor | 288-pin RDIMM |
| Error correction | On-die ECC + module ECC |
| DRAM components | SK hynix 16Gb DDR5 die, 40 components |
| OEM qualification | Supermicro MEM-DR564MC-ER56 (same module, Supermicro certified) |
| Operating temperature | 0°C to +85°C (case) |
Parameters from SK hynix module decoder, OEMPCWorld spec sheet and Supermicro-certified listing (MEM-DR564MC-ER56). Market signals retrieved 2026-11-11; dates shown per row.
| Signal | Detail | Source & date |
|---|---|---|
| Broker market pricing | International broker quotes for HMCG94AGBRA-family 64GB DDR5-5600 RDIMMs run at USD 3,152–3,533 per 1,000 pcs (Oct 2026 listings) — far above original contract pricing, confirming tightness of this speed grade. | corewavelabs.com HMCG94AGBRA177N / HMCG94AGBRA632N listings, Oct 2026 |
| OEM channel stock-outs | Multiple regional resellers list HMCG94AGBRA as out of stock or quote-only, with lead times quoted in weeks — while OEM-qualified equivalents (Supermicro MEM-DR564MC-ER56) carry a price premium. | neoxcomputers.co.uk / morecoco.co.uk listings, Aug–Nov 2026 (retrieved 2026-11-11) |
| Decoder confirmation | SK hynix part-number decoder: HMCG94 = 64GB 2Rx4, G = DDR5-5600, R = RDIMM — the standard 64GB speed-5600 server module across the industry. | nemixram.com SK hynix decoder (retrieved 2026-11-11) |
They are internal SK hynix lot/revision identifiers that distributors append to the base part number. Electrically these are the same 64GB DDR5-5600 2Rx4 CL46 module. Send us your exact BOM line and we ship the matching suffix — or confirm equivalence in writing if your ERP only stores the base number.
MEM-DR564MC-ER56 is the Supermicro-qualified equivalent stocked under Supermicro branding; the underlying module is the SK hynix HMCG94AGBRA family. If your server requires the Supermicro-branded module we can source that line as well — ask for a quote.
Yes — the module negotiates down to the platform speed (e.g. 4800 MT/s on Genoa/older boards, 5600 on current ones). Population rules (ranks per channel, 1DPC/2DPC) still follow the server vendor QVL.
Send your BOM line, target quantity and delivery terms — we reply within 24 business hours.
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