Intel shares DDR5-4800 RAM details for Alder Lake processors


By now, it’s common knowledge that Intel’s 12th generation Alder Lake will be the first mainstream processor platform to adopt DDR5 memory. The chipmaker (via momomo_us) has released a new document that lists the various DDR5-4800 memory modules that have been validated for its next-generation platform. Maybe one of these models will land DDR5 number one on our best RAM list.

Instead of validating the various DDR5 products itself, Intel has delegated the arduous task to Advanced Validation Labs, Inc (AVL), a renowned specialist in memory testing and validation during the pre- or post-production phase. . The company specifically focused on DDR5-4800 memory, which is the base standard for Alder Lake. These are non-ECC memory modules that follow JEDEC guidelines including 1.1V DRAM voltage and poor 40-39-39 timings.

AVL has tested memory modules from well-known vendors, such as SK hynix, Sasmsung, Micron, Crucial and Kingston. If the throughput remains the same for all candidates, the capacities vary between 8 GB and 32 GB per memory module. According to the Intel document, DRAM makers will start with 16 gigabit DDR5 RAM chips. so there is enough headroom to achieve the capacity they want to offer for each individual memory module.

One of the new features of DDR5 is on-board voltage regulation, obtained by equipping the memory module with a power management integrated circuit (PMIC). As for the initial DDR5 memory modules, they will take advantage of a PMIC from Renesas. The document did not specify the exact model of the PMIC. However, we believe it could be the P8911, which is an optimized version of the P8900 that Renesas designed for server memory.

DDR5-4800 specifications

DIMM providerDIMM part numberDIMM typeDIMM sizeRated speedR / CDRAM providerDRAM part numberDRAM densityDRAM date codeDie RevRow widthPMIC providerPMIC Rev
SK hynixHMCG66MEBUA081NUDIMM n-ECC8 GB4800C0SK hynixH5CG46MEBDX01516 GB2127M1Rx16RenesasB0
SK hynixHMCG78MEBUA081NUDIMM n-ECC16 GB4800A0SK hynixH5CG48MEBDX01416 GB2127M1Rx8RenesasB0
SK hynixHMCG88MEBUA081NUDIMM n-ECC32 GB4800B0SK hynixH5CG48MEBDX01416 GB2127M2Rx8RenesasB0
SamsungM323R1GB4BB0-CQKODUDIMM n-ECC8 GB4800C0SamsungK4RAH165VB-BCQK16 GB2137B1Rx16RenesasB0
SamsungM323R1GB4BB0-CQKODUDIMM n-ECC16 GB4800A0SamsungK4RAH086VB-BCQK16 GB2137B1Rx8RenesasB0
SamsungM323R4GA3BB0-CQKODUDIMM n-ECC32 GB4800B0SamsungK4RAH086VB-BCQK16 GB2137B2Rx8RenesasB0
MicronMTC8C1084S1UC48BA1UDIMM n-ECC16 GB4800A0MicronMT60B2G8HB-48B: A16 GB2137A1Rx8RenesasB0
MicronMTC16C2085S1UC48BA1UDIMM n-ECC32 GB4800B0MicronMT60B2G8HB-48B: A16 GB2137A2Rx8RenesasB0
CrucialCT16G48C40U5UDIMM n-ECC16 GB4800A0MicronMT60B2G8HB-48B: A16 GB2137A1Rx8RenesasB0
CrucialCT32G48C40U5UDIMM n-ECC32 GB4800B0MicronMT60B2G8HB-48B: A16 GB2137A2Rx8RenesasB0
KingstonKVR48U40BS8-16UDIMM n-ECC16 GB4800A0SK hynixH5CG48MEBDX01416 GB2127M1Rx8RenesasB0
KingstonKVR48U40BD8-32UDIMM n-ECC32 GB4800B0SK hynixH5CG48MEBDX01416 GB2127M2Rx8RenesasB0

SK hynix, Samsung and Micron are integrated circuit manufacturers, so naturally they will use their own integrated circuits in their DDR5 products. Kingston, on the other hand, will use SK hynix for its integrated circuits / Meanwhile, Crucial, which is Micron’s mainstream brand, will use the latter’s integrated circuits.

If we look at ICs, it looks like SK hynix and Micron will be bringing their respective M and A matrices to DDR5. These scale well enough with higher voltages, but they aren’t exactly known to work with tight timings. This is where Samsung’s B-die ICs excelled in the DDR4 era. The document confirms that Samsung’s DDR5 ICs are Revision B, so they should be B-die. If DDR5 B-dies look like previous DDR4 B-dies, they will likely become de facto ICs again for overclockers.

Apparently the recipe does not vary with 8GB and 16GB memory modules regardless of brand. Companies will stick with a single row design, 1Rx16 for 8 GB and 1Rx8 for 16 GB. In comparison, 16 GB of DDR4 was a double row guarantee in the beginning. Eventually, many brands of memory moved to a single row design with the introduction of higher density chips. With DDR5, however, 32GB memory modules are the only sure-fire ticket to a two-row (2Rx8) layout.

Why is the above important? Dual rank memory is generally faster than single rank memory, but not in all workloads. AMD’s Intel Core and Ryzen processors both benefit from dual rank memory, and tests have shown that four ranks of memory is the ideal configuration for maximum performance. It remains to be seen if Alder Lake favors the same setup, however.

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