Micron · MTC40F2046S1RC56BA1
Micron 64GB DDR5-5600 ECC RDIMM Server Memory
A 64GB Micron DDR5-5600 ECC registered DIMM with CL46 latency and 2Rx4 dual-rank organization. MTC40F2046S1RC56BA1 is marked Obsolete by the manufacturer and is presented for legacy-platform selection. Supply and system compatibility require confirmation.
- 64GB per module / DDR5-5600 MT/s
- ECC registered RDIMM / 2Rx4 dual rank
- CL46 / 288 pins / x80 module bus
- 1.1V I/O / manufacturer operating range 0–95°C
- Manufacturer status: Obsolete; confirm availability
Published model specifications describe available options, not the delivered configuration.
Configurations & prices
Listed price: $2,549.68
Listed prices are indicative; confirm tax, stock, compatibility, lead time and service in a written quotation.
Specifications & selection notes
Capacity and Speed
| Manufacturer part number | MTC40F2046S1RC56BA1 |
|---|---|
| Capacity | 64GB（Per module / per module） |
| Technology | DDR5 SDRAM |
| Rated data rate | 5600 MT/s |
| Memory clock | 2800 MHz |
| CAS latency | CL46 |
Module Organization and ECC
| Module type | RDIMM / Registered DIMM |
|---|---|
| ECC Error correction ECC | Supports / Supported |
| Registered | Supports / Supported |
| Rank organization | 2Rx4（Dual Rank / dual rank） |
| Component width | x4 |
| Module bus width | x80 |
| Pin count | 288 |
| DRAM component count | 40 |
Electrical and Environmental
| I/O voltage | 1.1V |
|---|---|
| Manufacturer operating range | 0°C to +95°C |
| DRAM die density | 16Gb |
| DRAM die revision | A |
Platform Compatibility and Installation
| Supported socket type | Only for platforms supporting DDR5 ECC RDIMM Servers and professional platforms；Cannot be used on platforms supporting only UDIMM Or SO-DIMM Platforms。 / Requires DDR5 ECC RDIMM support; not for UDIMM-only or SO-DIMM platforms. |
|---|---|
| Platform checks | Check the complete server model、CPU、BIOS、Per module 64GB Capacity、2Rx4 Organization and manufacturer compatibility list。 / Verify server model, CPU, BIOS, 64GB module support, 2Rx4 organization and the vendor support list. |
| Actual operating speed | Rated 5600 MT/s Not all platforms are guaranteed to achieve this speed；Actual speed depends on CPU、Motherboard、BIOS、Per channel DIMM Quantity and mixed population。 / Actual speed depends on CPU, board, BIOS, DIMMs per channel and mixed configurations. |
| Population and mixing | Follow the system manufacturer's channel-population and mixing rules，Check existing memory labels before purchase。 / Follow the system vendor's population and mixing rules; check existing module labels before ordering. |
| Mechanical fit | Check installation space against the exact-part mechanical drawing and server maintenance manual，Do not use DRAM Chip package dimensions as module dimensions。 / Verify the part-specific module drawing and server manual; chip package dimensions are not module dimensions. |
Documentation and Image Notes
| Micron product page | https://www.micron.com/products/obsolete/obsolete-rdimm/part-catalog/part-detail/mtc40f2046s1rc56ba1 |
|---|---|
| Manufacturer family datasheet (2021) | https://mm.digikey.com/Volume0/opasdata/d220001/medias/docus/7607/mtc40f2046s1rcdrx4rdimmdiereva.pdf |
| Datasheet scope | The listed earlier family PDF Used to check 288 Pins、Dual Rank And x4；Its speed table lists only 4800。For this exact part number 5600 MT/s、CL46 And discontinued status follows the manufacturer's discontinued-parts catalog。 / The old family PDF confirms pins/rank/width, but only tabulates 4800. Exact-part 5600, CL46 and lifecycle were checked in the manufacturer obsolete catalog. |
| Main image | Micron DDR5 RDIMM Series illustration，Not a photograph of this exact part number；Appearance is subject to the actual supplied product。 / Micron DDR5 RDIMM family illustration, not an exact-part photograph; delivered appearance may differ. |
| Image source | https://www.cdw.ca/product/micron-ddr5-module-32-gb-dimm-288-pin-pc5-25600-registered/8572055 |
| Sources checked | 2026-09-17 |
Product images
Images are references. Components, interfaces and the delivered configuration are specified in the quotation.
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