Upcoming AMD BIOS May Support 24GB, 48GB RAM on AMD Motherboards

Ryzen 9 7950X
Ryzen 9 7950X (Image credit: Shutterstock)

Intel 600-series and 700-series motherboards have welcomed the latest 24GB and 48GB DDR5 memory modules. The same support could come to the AMD 600-series motherboards with the next AGESA firmware update.

Whether you're looking for the best RAM for gaming or work, DDR5 is improving both in frequency and capacity. The production of 24Gb dies enabled memory manufacturers to offer non-binary memory module capacities in the shape of 24GB and 48GB DIMMs. It's an attractive prospect for mainstream users that need large amounts of memory but don't want to invest in an HEDT or workstation platform.

For instance, users can have up to 192GB (4x48GB) of memory at their disposal on a regular four-DIMM motherboard. Small form factor (SFF) system enthusiasts will also be delighted at the probability of running 96GB (2x48GB) on a mini-ITX motherboard — something that a mainstream consumer could only dream of before DDR5.

As we've seen with Intel's motherboard partners, some motherboards support the latest non-binary DIMMs right off the bat while others require a firmware update. It depends on the vendor. In AMD's case, the motherboard will definitely need new firmware. Hardware leaker chi11eddog, a decent source of information, claims that the upcoming AGESA firmware should support non-binary DIMMs. AMD is likely diligently working behind the scenes to make AM5 motherboards embrace 24GB and 48GB DIMMs.

The majority of AM5 motherboards are currently on the AGESA ComboAM5PI firmware. Only Asus has released test BIOSes for a handful of the company's AMD 600-series motherboards with the ComboAM5PI firmware. It's safe to assume that the ComboAM5PI firmware isn't ready for public usage yet. Assuming that chi11eddog's information is accurate, it'll take some time before AMD releases the ComboAM5PI firmware, which is the version that reportedly arrives with support for 24GB and 48GB DDR5 memory modules.

Some AM5 motherboards can already boot with 24GB DIMMs, suggesting the lack of optimizations prevents the memory modules from working correctly on the motherboards. It should be easy to solve since we're dealing with capacity instead of frequency. First-generation Ryzen processors struggled with memory support, and the same could be said about Intel's Haswell-E HEDT chips. However, those were about memory speed. Memory capacity is probably a more straightforward matter.

Unfortunately, we haven't seen any AMD AGESA roadmaps lately, so it's uncertain when the ComboAM5PI firmware will arrive. Vendors are just making the transition from to, so it could be weeks or maybe even months before we start seeing in beta BIOSes.

Zhiye Liu
RAM Reviewer and News Editor

Zhiye Liu is a Freelance News Writer at Tom’s Hardware US. Although he loves everything that’s hardware, he has a soft spot for CPUs, GPUs, and RAM.

  • ttquantia
    How is ECC support going to be? AM4 motherboards had ECC support at a reasonable level, but AM5 currently seems quite weak in this respect. DDR5 "ECC-light" is not enough. Is this going to be fixed in later Agesa versions?
  • Amdlova
    ttquantia said:
    How is ECC support going to be? AM4 motherboards had ECC support at a reasonable level, but AM5 currently seems quite weak in this respect. DDR5 "ECC-light" is not enough. Is this going to be fixed in later Agesa versions?
    Amd support for ecc its a nightmare. First you need find a board with ecc guaranteed . After that you need a bit of luck. Days of reading forums and testing. Or buy an asrock hack motherboard :)
  • waltc3
    My x570 Aorus Master rev 1.0 eventually got ECC support via a bios update, but I stay away from it because I don't trust the reliability of the parity bit...;) Plus, I never see errors these days, so I don't worry. People must surely understand that the current AM5 motherboards are teething and will have teething pains for a few months until AMD gets the AGESAs where it wants them and the board vendors get their individual bios codes matured. AM5 is just beginning out of the starting gate, so to speak. There is quite a bit of headroom left for AM5, imo.
  • peachpuff
    Is there enough space on the bios to support these? Which cpus are they going to delete? 😂