LGA 2601 socket: CPUs, chipsets and cooler fit
LGA 2601 is the IBM land grid array socket that carries POWER9 Sforza scale-out server and workstation processors. It uses 2601 lands in a 50 mm by 50 mm flip-chip package with direct-attach DDR4 memory and 48 PCIe Gen4 lanes.
Quick facts
| Maker | IBM |
|---|---|
| Package type | LGA |
| Contacts | 2,601 |
| Package size | 50 × 50 mm |
| Introduced | November 2017 |
| Status | Legacy |
| Memory | Eight DDR4 ports with ECC through the on-chip controllers |
| PCIe from the CPU | 48 PCIe Gen4 lanes from the SoC per socket |
| Cooler mounting holes | LGA backplate and retention frame |
| Replaces | POWER8 (different socket, no page) |
| Replaced by | None |
Overview
The socket serves single and dual-socket OpenPOWER servers and workstations from late 2017, including the Talos II and Blackbird owner-controllable boards. Its two-way SMP links cover dual-socket topologies.
Processor generations
| Codename | Marketing name | Years | Notes |
|---|---|---|---|
| Sforza | POWER9 Sforza scale-out | 2017 | 14 nm Power ISA v3.0 SoCs with up to 24 cores, 512 KB of L2 cache per core and 120 MB of L3 cache, including the 8-core 02CY089 at 3.5 GHz and the 16-core 02CY417 at 2.3 GHz. |
Who LGA 2601 serves
LGA 2601 targets OpenPOWER single and dual-socket servers and workstations. Boards such as the Talos II EATX and Blackbird microATX pair the socket with DDR4 ECC memory and open firmware. Scale-out SMT4 parts serve Linux while SMT8 parts serve PowerVM.
Memory and cooling
Memory is DDR4 with ECC through the eight on-chip ports, up to 2 TB per socket with direct attach. Cooling uses server and workstation heatsinks on the LGA frame. OpenBMC firmware comes from the board vendor on open boards.
CPUs on LGA 2601
2 processor pages in the database, newest first.
| Processor | Cores / threads | Base / boost | TDP | Launched |
|---|---|---|---|---|
| IBM POWER9 02CY089 | 8 / 32 | 3.5 / 3.8 GHz | 160 W | Nov 2017 |
| IBM POWER9 02CY417 | 16 / 64 | 2.3 / 3.8 GHz | 130 W | Nov 2017 |
Frequently asked questions
Which processors fit LGA 2601?
IBM POWER9 Sforza scale-out server processors, including the 8-core 02CY089 at 3.5 GHz and 160 W and the 16-core 02CY417 at 2.3 GHz and 130 W covered here.
Is LGA 2601 the same as LGA 4926?
No. LGA 2601 has 2601 lands for IBM POWER9 Sforza packages, while LGA 4926 is an Ampere Arm socket with a different pattern. Forcing a chip can damage the board.
What memory does LGA 2601 use?
Eight DDR4 ports with ECC through the on-chip controllers, up to 2 TB per socket. OpenPOWER boards such as Talos II set the exact population rules.
How many PCIe lanes does LGA 2601 provide?
48 PCIe Gen4 lanes from the SoC per socket. Lanes feed NVMe storage, network and OpenCAPI accelerators.
Sources and verification
- POWER9 Sforza FCLGA-2601 50mm (WikiChip)
- POWER9 Sforza LGA 2601-pin socket (Wikipedia)
- IBM POWER9 scale-out direct memory (HotChips)
Facts last checked against these sources on . Page last edited on .