LGA 4926 socket: CPUs, chipsets and cooler fit
LGA 4926 is the Ampere land grid array socket that carries Altra and Altra Max cloud-native server processors. It uses 4926 lands in a 77.08 mm by 67.00 mm flip-chip package with eight DDR4 channels and 128 PCIe Gen4 lanes.
Quick facts
| Maker | Ampere |
|---|---|
| Package type | LGA |
| Contacts | 4,926 |
| Package size | 77.08 × 67.00 mm |
| Introduced | March 2020 |
| Status | Previous generation |
| Memory | Eight channels of DDR4-3200 ECC memory through the on-chip controllers |
| PCIe from the CPU | 128 PCIe Gen4 lanes from the SoC per socket, 192 lanes in two-socket systems |
| Cooler mounting holes | LGA backplate and retention frame |
| Replaces | None (first Ampere socket) |
| Replaced by | None |
Overview
The socket serves single and dual-socket cloud servers from 2020 with 32 to 128 single-thread Arm cores per package. Its mesh interconnect and per-core power estimation target dense, efficient racks.
Processor generations
| Codename | Marketing name | Years | Notes |
|---|---|---|---|
| Altra | Ampere Altra | 2020 | 7 nm Arm v8.2+ SoCs with up to 80 single-thread cores, 1 MB of L2 cache per core and 32 MB of system cache, including the 80-core Q80-30 at 3.0 GHz and 210 W. |
| Altra Max | Ampere Altra Max | 2021 | 7 nm Arm v8.2+ SoCs with up to 128 single-thread cores, 1 MB of L2 cache per core and 16 MB of system cache, including the 128-core M128-30 at 3.0 GHz and 250 W. |
Who LGA 4926 serves
LGA 4926 targets cloud-native single and dual-socket servers with dense Arm cores. Boards from ASRock Rack, GIGABYTE and Supermicro pair the socket with DDR4 RDIMM pairs and Gen4 NVMe storage. The Mt. Jade platform covers single-socket developer and edge systems.
Memory and cooling
Memory is DDR4-3200 ECC RDIMM and LRDIMM through the eight on-chip channels, up to 4 TB per socket with strict population rules. Cooling uses 2U and 1U server heatsinks on the LGA frame with front-to-back airflow rated up to 250 W. Firmware is Tianocore EDKII or AMI AptioV with AST2500 BMC management on most boards.
CPUs on LGA 4926
16 processor pages in the database, newest first.
| Processor | Cores / threads | Base / boost | TDP | Launched |
|---|---|---|---|---|
| Ampere Altra Q64-33 | 64 / 64 | 3.3 GHz | 220 W | 2022 |
| Ampere Altra Q80-33 | 80 / 80 | 3.3 GHz | 250 W | 2022 |
| Ampere Altra Max M112-30 | 112 / 112 | 3.0 GHz | 240 W | 2021 |
| Ampere Altra Max M128-26 | 128 / 128 | 2.6 GHz | 190 W | 2021 |
| Ampere Altra Max M128-28 | 128 / 128 | 2.8 GHz | 230 W | 2021 |
| Ampere Altra Max M128-30 | 128 / 128 | 3.0 GHz | 250 W | 2021 |
| Ampere Altra Max M96-28 | 96 / 96 | 2.8 GHz | 190 W | 2021 |
| Ampere Altra Max M96-30 | 96 / 96 | 3.0 GHz | 220 W | 2021 |
| Ampere Altra Q32-17 | 32 / 32 | 1.5 / 1.7 GHz | 65 W | 2020 |
| Ampere Altra Q64-22 | 64 / 64 | 2.2 GHz | 95 W | 2020 |
| Ampere Altra Q64-26 | 64 / 64 | 2.6 GHz | 125 W | 2020 |
| Ampere Altra Q64-30 | 64 / 64 | 3.0 GHz | 180 W | 2020 |
| Ampere Altra Q72-30 | 72 / 72 | 3.0 GHz | 195 W | 2020 |
| Ampere Altra Q80-26 | 80 / 80 | 2.6 GHz | 150 W | 2020 |
| Ampere Altra Q80-28 | 80 / 80 | 2.8 GHz | 185 W | 2020 |
| Ampere Altra Q80-30 | 80 / 80 | 3.0 GHz | 210 W | 2020 |
Frequently asked questions
Which processors fit LGA 4926?
Ampere Altra and Altra Max Arm server processors with up to 128 cores, including the 80-core Q80-30 at 3.0 GHz and 210 W and the 128-core M128-30 at 3.0 GHz and 250 W covered here.
Is LGA 4926 the same as LGA 4677?
No. LGA 4926 has 4926 lands with pins in the socket for Ampere Altra packages, while LGA 4677 and LGA 7529 are Intel Xeon sockets with different patterns. Forcing a chip can damage the board.
What memory does LGA 4926 use?
Eight channels of DDR4-3200 ECC RDIMM and LRDIMM memory through the on-chip controllers, up to 16 DIMMs and 4 TB per socket. The board sets the exact population rules.
How many PCIe lanes does LGA 4926 provide?
128 PCIe Gen4 lanes from the SoC per socket, 192 lanes in a two-socket system. Lanes feed NVMe storage and network cards directly.
Sources and verification
- Ampere Altra datasheet 4926-pin FCLGA (Ampere)
- Ampere Altra Max datasheet (Ampere)
- Single Socket LGA 4926 board (ASRock Rack)
Facts last checked against these sources on . Page last edited on .