GIGABYTE Server Memory Guide: Xeon 6, EPYC 9005, AmpereOne and Every R, G, H and E-Series System

GIGABYTE builds servers for nearly every corner of the data center: 1U and 2U rack servers, 8-GPU AI systems, multi-node and blade chassis, short-depth edge boxes, storage servers, server motherboards for integrators, and W-series workstations. Across those families and a dozen processor platforms, the right memory changes from model to model. NEMIX RAM has now completed its GIGABYTE enterprise catalog: 417 listings covering 354 GIGABYTE servers, server motherboards and workstations, every current model with a published memory specification plus the DDR4 platforms still in service, with 47 configuration suffixes mapped so a search on your exact model number finds the right listing. This guide explains how to read a GIGABYTE model number, which memory each platform takes, and where to find your module.

In this guide: Reading a GIGABYTE model number · Memory by platform · Xeon 6 · AMD EPYC · Ampere · UDIMM platforms · DDR4 platforms · Shop by family · Population rules · FAQ

Reading a GIGABYTE model number

A GIGABYTE server model number such as R283-Z96-AAE1 has three parts, and the first two tell you most of what you need to know about memory:

• The first letter is the family: R for rack servers, G for GPU servers, H for high-density multi-node servers, B for blade systems, E for edge servers and S for storage servers. XL and XV models are MGX-based GPU systems, and W is a workstation.
• The last digit of the first block is the platform generation. Across the models we list, 2 marks DDR4 platforms (such as the R282 and R182), 3 marks the first DDR5 generation (4th and 5th Gen Xeon Scalable, EPYC 9004 and 8004, AmpereOne), 4 marks Xeon 6 and EPYC 9005, and 5 marks EPYC 9006.
• The letter after the dash is the processor family: S for Intel Xeon Scalable and Xeon 6 6700/6500, A for Xeon 6 6900, Z for AMD EPYC 9004/9005, D for EPYC 9006, E for EPYC 8004/8005, C for EPYC 4004/4005, X for Xeon 6300 and E-2400, and P or T for Ampere.
• The suffix (such as -AAE1 or -AAJ1) is the configuration. Suffix versions of the same system use the same board and take the same memory.

Treat the letters as a guide and confirm on the listing: each one names the exact model it fits. The full model number is on the system label, the pull-out asset tag and your order paperwork. Type it into the search bar at the top of the page, suffix and all, and the matching listing comes up.

Which memory does my GIGABYTE server take?

GIGABYTE server memory follows the processor platform. Every DDR5 platform below takes registered ECC memory except the EPYC 4004/4005 and Xeon 6300/E-2400 systems, which take unbuffered UDIMMs. DDR4 and DDR5 modules are keyed differently and will not fit each other's slots.

Intel Xeon 6: DDR5-6400, and what the higher ratings mean

GIGABYTE's Xeon 6 servers split into two sockets. The 6900-series systems (G4L4-AD1-LAX5, H374-A81-LAW1, B684-A80-AAS1) run 12 memory channels per processor; the 6700/6500-series systems (G894-SG1-AAX1, G494-SB3-AAP1, R164-SG6-AAJ1) run 8. Both take DDR5-6400 RDIMMs, and every NEMIX RAM Xeon 6 listing is DDR5-6400. GIGABYTE rates some of these platforms above 6400 MT/s. Those higher ratings apply to MRDIMMs (multiplexed-rank DIMMs), a separate module type, or to newer RDIMM speed grades; standard DDR5-6400 RDIMMs run at up to 6400 MT/s on every Xeon 6 system. Do not mix MRDIMMs and RDIMMs in one server.

The 5th and 4th Gen Xeon Scalable systems that came before them (G593-SX1-LAX1, G893-SG1-AAX1, H263-S66-AAW1) take DDR5 RDIMMs at 5600 MT/s with 5th Gen processors and 4800 MT/s with 4th Gen. A DDR5-5600 module works in a 4th Gen system and simply runs at 4800.

AMD EPYC: 9006, 9005, 9004 and 8004

The AMD lineup is where the processor in the box matters most. On SP5 systems such as the G293-Z20-AAP1, G294-Z43-AAP2, R283-Z96-AAE1, EPYC 9005 processors run DDR5 at up to 6400 MT/s and EPYC 9004 processors at up to 4800 MT/s, across 12 channels per processor. The NEMIX RAM listings are DDR5-6400, which covers both: in an EPYC 9004 server the modules run at 4800. If you are adding to installed DDR5-4800 modules, match their capacity and rank, and the whole set runs at 4800.

The new EPYC 9006 systems (R185-D90-LS1, R285-D90-LS1, G295-D21-AP1, B685-D80-LS1) are rated by GIGABYTE above 6400 MT/s; as on Xeon 6, standard DDR5-6400 RDIMMs run at up to 6400. EPYC 8004 and 8005 systems (R143-E30-AAG1, R243-EG0-AAL1, E243-E30-AAD1) are designed for power-efficient and edge deployments, with 6 memory channels per processor; the modules run at the speed the processor supports.

Ampere: AmpereOne and Altra

GIGABYTE's Arm servers take standard registered ECC memory. AmpereOne systems (R163-P30-AAG1, R183-P90-AAJ1, R283-P92-AAL1) take DDR5 RDIMMs; NEMIX RAM lists them at DDR5-5600, and each listing states the speed GIGABYTE rates for that model (the R1A3-T40-AAV1, R2A3-T40-AAV1 are rated at 5600 MT/s). The earlier Ampere Altra and Altra Max systems (R282-P91, R182-P91, MP72-HB0) take DDR4-3200 RDIMMs or LRDIMMs.

Unbuffered (UDIMM) platforms: EPYC 4004/4005 and Xeon 6300

Not every GIGABYTE server takes registered memory. Entry and blade systems based on AMD EPYC 4004/4005 and Ryzen (B343-C40-AAJ3, B353-C60-AAS2, MC13-LE1) and on Intel Xeon 6300 and E-2400 (R133-X13-AAB1, E133-X10-AAG1, B343-X40-AAS1) take DDR5 unbuffered UDIMMs, usually 4 slots per node. Use ECC UDIMMs for servers; where GIGABYTE supports non-ECC memory, the model also has a non-ECC listing. An RDIMM will not work in these systems, and a UDIMM will not work in a registered-memory server.

DDR4 platforms still in service

GIGABYTE's DDR4 generation remains in many racks: 3rd Gen Xeon Scalable servers (R282-3C1, R182-340, R282-G30), AMD EPYC 7003/7002 systems and boards (E152-ZE1, MZ72-HB2, MZ32-AR0), Ampere Altra servers, and the Xeon D-1700 MB12-CE0 board. They take DDR4-3200, and most have both an RDIMM listing and an LRDIMM listing. Match what is installed: RDIMMs and LRDIMMs cannot be mixed in one server. LRDIMMs are for the highest per-module capacities, such as 128GB.

Shop GIGABYTE memory by family

Or browse every GIGABYTE server, server board and workstation listing, GIGABYTE systems configured by Thinkmate, and 638 GIGABYTE desktop motherboards (AORUS, AERO, GAMING and UD boards, which take non-ECC UDIMMs).

Population rules for GIGABYTE servers

• Fill every channel evenly. Memory bandwidth scales with populated channels: 12 per processor on Xeon 6 6900 and EPYC 9004/9005/9006, 8 on Xeon 6 6700/6500 and Xeon Scalable, 6 on EPYC 8004. The kit sizes on each listing follow those counts, from single modules to a full server.
• Use one module size and type per server. Identical capacity, rank and speed across all slots gives the best speed and stability.
• One DIMM per channel is fastest. On systems with two slots per channel, adding the second DIMM raises capacity but can lower memory speed.
• Multi-node and blade systems are populated per node. Each node in an H-series or B-series chassis has its own slots and needs its own set of modules.

Frequently asked questions

My GIGABYTE server has a different suffix than the listing. Will the memory fit?

Yes. Suffix versions of the same GIGABYTE system (for example R283-Z96-AAE1 and R283-Z96-AAJ1) use the same board and take the same memory. Search your full model number and the matching listing appears.

My Xeon 6 or EPYC 9006 server is rated above DDR5-6400. Can I use DDR5-6400 RDIMMs?

Yes. Standard DDR5-6400 RDIMMs run at up to 6400 MT/s on those platforms. The higher ratings apply to MRDIMMs or newer RDIMM speed grades, which are separate module types.

Will DDR5-6400 memory work in an EPYC 9004 server?

Yes. EPYC 9004 processors run memory at up to 4800 MT/s, so DDR5-6400 modules run at 4800. If you upgrade to EPYC 9005 processors later, the same modules run at 6400.

Can I add NEMIX RAM modules to the memory already installed?

Yes, if the new modules match the installed ones in type, capacity, rank and speed. For servers, keep the population identical within each processor's channels; when in doubt, send us the part number printed on an installed module.

Does my GIGABYTE server take RDIMM or UDIMM?

Xeon Scalable, Xeon 6, EPYC 9000/8000/7000 and Ampere systems take registered RDIMMs (or LRDIMMs on DDR4 platforms). EPYC 4004/4005, Ryzen, Xeon 6300 and E-2400 systems take unbuffered UDIMMs. Each listing names the type.

Do you supply memory for a GIGABYTE cluster or integrator build?

Yes. Purchase orders, net terms and volume pricing are available for data centers, AI and HPC sites, universities, government buyers, system integrators and resellers. Send us the model numbers and target capacity and we will quote the matching modules.

Buying GIGABYTE server memory from NEMIX RAM

NEMIX RAM is a US-based server memory specialist, in business since 1993. Every module is researched, matched, and compatibility-tested by NEMIX RAM, is JEDEC-compliant, and is backed by a lifetime warranty. Purchase orders, net terms and volume pricing are available for data centers, AI and HPC sites, universities, government buyers, system integrators and resellers. Request a quote for a cluster, a rack refresh or a build program, or send us your GIGABYTE model number and we will confirm the right module before you order.

Start here: GIGABYTE memory guide page · all GIGABYTE servers · GPU servers · rack servers · server motherboards