Gigabyte B550M DS3H Upgrade Guide: RAM, SSD and CPU

Lifecycle and support

A current model: sold new and supported.

Dates not listed haven't been published by the manufacturer or a reliable third party.

RAM: DDR4, up to 128 GB

The board has four full-size DDR4 DIMM slots running in dual channel. Each module can be up to 32 GB, for 128 GB in total. Only unbuffered modules should be used; registered DIMMs are not listed. Unbuffered ECC and non-ECC modules are both listed as supported, but whether ECC mode actually works depends on your CPU.

The rated speeds are DDR4-3200, 2933, 2667, 2400 and 2133. Gigabyte's product pages list speeds up to DDR4-4733, but those are overclocks, not guaranteed. Gigabyte's memory support list includes some DDR4-4133 kits. The newer manual also warns that your CPU and memory setup can affect supported memory types, speed and module count.

For two modules, use slots A2 and B2. For a single module, use DDR4_A2 or DDR4_B2. Gigabyte recommends matching capacity, brand, speed and chips.

Buying tips

• Buy full-size desktop DDR4 DIMMs, not laptop SO-DIMMs.
• Treat DDR4-3200 as the safe target; faster kits are overclocks.
• Check Gigabyte's memory support list before buying a high-speed kit.
• A matched two-module kit in A2 and B2 is the simplest upgrade.
• Skip registered DIMMs; use unbuffered modules only.

Storage: two M.2 slots and four SATA ports

The M2A_CPU slot is connected directly to the CPU and takes NVMe or SATA M.2 drives. With a Ryzen 5000 or 3000 (non-G) CPU it runs at PCIe 4.0 x4. With a G-series APU it drops to PCIe 3.0. The M2B_SB slot goes through the chipset, takes NVMe or SATA drives, and is PCIe 3.0 at best. Most documents say x2 for this slot, but one manual says x4/x2, so expect x2 speeds to be possible.

M.2 drive length depends on the revision. Gigabyte's earlier manuals list 2242, 2260, 2280 and 22110 for M2A_CPU and 2242, 2260 and 2280 for M2B_SB. The newer manual and the Rev 1.7 page list only 2280 and 22110 for M2A_CPU and only 2280 for M2B_SB, so shorter drives may not fit on those boards. A standard 2280 drive is the safest choice.

There are also four SATA 6Gb/s ports on the chipset, with RAID 0, 1 and 10 support. This is a bare board with no drive bays, so whether a 2.5-inch or 3.5-inch drive can be mounted depends on your case. You will need SATA cables. Gigabyte doesn't state a maximum drive capacity for the M.2 slots or SATA ports.

Buying tips

• Choose a 2280 NVMe drive; it fits every listed revision.
• For PCIe 4.0 speeds, use M2A_CPU with a Ryzen 5000 or 3000 non-G CPU.
• Don't pay extra for PCIe 4.0 in the chipset slot; it tops out at PCIe 3.0.
• For SATA drives, check your case has room and buy SATA cables.
• Avoid 2242 or 2260 drives unless your revision's manual lists them.

CPU: AM4, Ryzen 3000 and 5000

The board has one AMD Socket AM4. Gigabyte lists the same CPU families for all revisions: Ryzen 5000, Ryzen 5000 G, Ryzen 4000 G, Ryzen 3000 and Ryzen 3000 G. The earliest manual lists only 3rd Gen Ryzen, so older boards may need a BIOS update first. Gigabyte points to its CPU Support List for exact models, and we can't confirm individual models or the minimum BIOS version for each.

Boards from Rev 1.0 to 1.6 may need a BIOS update before a Ryzen 5000 CPU will boot. If you have no compatible CPU to boot with, Q-Flash Plus lets you update the BIOS without a CPU, memory or graphics card installed. BIOS files are specific to your revision, so download the one for the revision printed on your board. Gigabyte warns against flashing a BIOS if the system works fine, because a failed flash can cause problems.

Gigabyte doesn't publish a maximum CPU power (TDP) limit for this board. The only power detail given is a 6+2 phase digital VRM. For a high-power Ryzen, check the support list entry and make sure your cooler is up to it.

Buying tips

• Check the CPU Support List for your exact CPU and board revision before buying.
• If your board is older than Rev 1.7, plan on a BIOS update before fitting a Ryzen 5000 CPU.
• Ryzen G-series APUs run the CPU-connected M.2 slot at PCIe 3.0, not 4.0.
• Make sure your cooler is compatible with AM4.
• Keep an older compatible CPU on hand, or use Q-Flash Plus, if a BIOS update is needed.

How to upgrade

Before you start

• Find the revision printed on your board (Rev 1.0 to 1.3, 1.4 AC, 1.5/1.6 AC or 1.7). The 'V2' name couldn't be matched to a specific revision; Rev 1.7 is the closest match.
• Open the manual for your revision on Gigabyte's site and check M.2 lengths and the CPU Support List.
• Back up important files before opening the PC.
• For a CPU upgrade, note your current BIOS version and check whether the new CPU needs a newer one.
• Have a screwdriver and, for SATA drives, SATA cables ready.

Steps

1. Back up your data
   Copy important files to an external drive or cloud storage before you make any hardware change.
2. Update the BIOS if needed
   If you're fitting a newer Ryzen CPU on an older board, update the BIOS first using the file for your exact revision. Q-Flash Plus can update without a CPU installed. Don't flash needlessly.
3. Power off and unplug
   Shut the PC down fully, switch off the power supply and unplug the power cable. Hold the power button for a few seconds to drain leftover charge.
4. Ground yourself
   Touch bare metal on the case or use an anti-static wrist strap. Handle parts by their edges.
5. Open the case
   Remove the side panel. Check the owner's manual for exact disassembly and for how the cooler and drives are mounted.
6. Install the part
   RAM: put two modules in A2 and B2, or a single module in A2 or B2, and press firmly until seated. M.2 SSD: fit it in M2A_CPU for the fastest speed, following the manual's mounting instructions. SATA drive: mount it in a case bay and connect the SATA and power cables. CPU: follow the manual's AM4 instructions and reattach the cooler.
7. Close up and reconnect
   Refit the side panel, plug in the power cable and peripherals, and switch on.
8. Check the BIOS
   Enter the BIOS setup and confirm the new RAM amount, drive or CPU is detected. For new RAM, check the speed setting. A new drive may still need to be initialised and formatted in your operating system.

Good to know

• Specs differ by revision (Rev 1.0 to 1.3, 1.4 AC, 1.5/1.6 AC, 1.7), especially M.2 lengths. Check the revision printed on your board.
• We couldn't confirm which revision 'V2' refers to; Rev 1.7 is the closest match.
• Gigabyte's documents disagree on whether the chipset M.2 slot is PCIe 3.0 x2 or x4/x2. Expect x2 speeds to be possible.
• The newer manual and Rev 1.7 page list fewer M.2 lengths than older manuals, so 2242 and 2260 drives may not fit on newer boards.
• Gigabyte doesn't state a maximum capacity for the M.2 slots or SATA ports, or a maximum CPU power (TDP) limit.
• The minimum BIOS version for each CPU isn't listed here; check Gigabyte's CPU Support List for your exact CPU and revision.
• Memory speeds above DDR4-3200 are overclocks and aren't guaranteed.
• The AC version is the Wi-Fi variant; Gigabyte's documents show no RAM or storage difference between AC and non-AC.

Frequently asked questions

How much RAM can the Gigabyte B550M DS3H take?

Up to 128 GB across four DDR4 slots, with a maximum of 32 GB per module. Use unbuffered DDR4 DIMMs.

What RAM speed does the B550M DS3H support?

It is rated up to DDR4-3200. Gigabyte's product pages list speeds up to DDR4-4733, but those are overclocks. Check the memory support list before buying a fast kit.

Does the B550M DS3H support NVMe SSDs and PCIe 4.0?

Yes, it has two M.2 slots that take NVMe or SATA drives. Only the CPU-connected M2A_CPU slot can run PCIe 4.0, and only with Ryzen 5000 or 3000 non-G CPUs. The chipset slot is PCIe 3.0 at best.

Does the B550M DS3H support Ryzen 5000 CPUs?

Yes. Gigabyte lists Ryzen 5000 and 3000, plus 5000 G, 4000 G and 3000 G APUs. Older boards (Rev 1.0 to 1.6) may need a BIOS update first. Check the CPU Support List for your exact model.

Does the B550M DS3H support ECC memory?

Unbuffered ECC DIMMs are listed as supported, but ECC mode depends on the CPU you install.

Will every M.2 drive length fit?

Not necessarily. Earlier manuals list 2242, 2260, 2280 and 22110 on the CPU slot, but the newer manual and the Rev 1.7 page list only 2280 and 22110, and only 2280 on the chipset slot. A 2280 drive is the safe choice.

Official documents and references

• Gigabyte B550M DS3H rev 1.7 specifications
  Memory, M.2, CPU families and Q-Flash Plus
• PDF Gigabyte B550M DS3H user manual (1503)
  Memory population, M.2 lengths and slot details
• PDF Gigabyte B550M DS3H AC user manual (1401)
  Memory speeds, M.2 lengths and SATA/RAID
• PDF Gigabyte memory support list (Cezanne)
  Tested memory kits
• Gigabyte B550M DS3H rev 1.0 to 1.3 specifications
  Specs for earlier revisions
• Gigabyte B550M DS3H AC rev 1.4 specifications
  Specs for the Rev 1.4 AC board
• Gigabyte B550M DS3H rev 1.7 support and BIOS downloads
  BIOS versions and CPU support list
• Gigabyte B550M DS3H AC rev 1.7 support and BIOS downloads
  BIOS versions and update notes