Intel Xeon w5-2555X socket: LGA 4677
The Intel Xeon w5-2555X uses LGA 4677, the LGA workstation socket for Sapphire Rapids Xeon W with W790 chipsets, DDR5 RDIMM memory and 64 PCIe Gen5 lanes. The unlocked 14-core chip at 210 W suits mainstream workstation boards.
- Socket
- LGA 4677
- Launched
- August 2024
- Cores and threads
- 14 and 28
- Base power
- 210 W
- Codename
- Sapphire Rapids
- Segment
- Workstation
- Family
- Intel Xeon W
- Clocks
- 3.3 / 4.8 GHz
Intel Xeon w5-2555X specifications
| Cores | 14 |
|---|---|
| Threads | 28 |
| Core architecture | Golden Cove (P-cores only, monolithic) |
| Clocks | 3.3 GHz base, up to 4.8 GHz boost |
| Cache | 33.7 MB Intel Smart Cache |
| Processor base power (TDP) | 210 W |
| Manufacturing process | Intel 7 (10 nm) |
| Memory support | DDR5-4800 RDIMM with ECC, 4 channels |
| PCI Express | PCIe 5.0 x64 |
| Integrated graphics | None |
| Multiplier | Unlocked |
| ECC memory | Yes |
| Package | FCLGA4677 (77.5 by 56.5 mm) |
Motherboard and chipset compatibility
Intel Xeon w5-2555X needs a motherboard with a LGA 4677 socket. The table shows which chipset series accept it.
| Series | Chipsets | Support |
|---|---|---|
| W790 workstation | W790 | Works out of the box |
Board makers publish a CPU support list for every model. Check it for your exact board before buying. Chipset details for LGA 4677.
LGA 4677 at a glance
| Type | LGA, 4,677 contacts |
|---|---|
| Package size | 77.5 × 56.5 mm |
| Introduced | 2023 |
| Memory | DDR5-4800 Registered DIMMs with ECC, 8 channels up to 4 TB on W-3500 and W-3400, 4 channels on W-2500 and W-2400 |
| Cooler mounting holes | Board specific (workstation heatsink) |
What the Xeon w5-2555X is
The Xeon w5-2555X is a 14-core and 28-thread workstation processor that launched in August 2024 as the unlocked Sapphire Rapids-64L refresh for mainstream workstations. Fourteen Golden Cove Performance-cores with Hyper-Threading and no Efficient-cores give 28 threads at 3.3 GHz base and up to 4.8 GHz boost. Cache is 33.7 MB of Smart Cache. Processor base power is 210 W with tuning headroom on X SKUs.
The high 3.3 GHz base keeps single-threaded CAD responsive while 14 cores handle background tasks. Four-channel DDR5-4800 RDIMM with ECC feeds the die from board memory. Up to 64 Gen5 lanes serve one GPU plus NVMe RAID without dual-socket cost.
Mainstream CAD workstations with fast interaction fit here. Fourteen cores at high base cover assemblies plus documents together. Buyers who need 18 cores for larger models should take the Intel Xeon w5-2565X with 37.5 MB cache instead, since this w5 prioritizes clocks.
Socket and motherboard compatibility
The w5-2555X fits LGA 4677 on W790 mainstream boards with 210 W delivery. Boards accept W-2400 plus W-2500 refresh SKUs with a BIOS that lists the part. The FCLGA4677 package uses the E1A carrier.
Memory is DDR5-4800 RDIMM with ECC in 4 channels. XMP-compatible tuning is available on X SKUs where enabled. Locked power profiles keep tuning to board menus.
W-2500 shoppers compare unlocked 14-core parts on cache and clocks. The w5-2555X leads on base for interactive work. The Socket vs chipset: what decides whether a CPU works guide explains vendor lists.
Memory, PCIe and cooling
DDR5-4800 RDIMM with ECC in 4 channels is the W-2500 standard. CAD models plus datasets should be sized together. Matched quartets are preferred.
PCIe gives 64 Gen5 lanes from the CPU plus 28 chipset lanes for GPU, NVMe and LAN. Fixed splits mean plans must match the manual.
Cooling is workstation 210 W with vendor-qualified air. No retail cooler ships with tray supply.
Upgrade paths
LGA allows moves within the vendor list, such as to 18-core W-2500 parts with stronger cooling. Memory and NVMe can also grow. BIOS must support the target.
The bandwidth leap is to 8-channel W-3500. A working w5-2555X serves mainstream desks for years.
Frequently asked questions
What socket does the Xeon w5-2555X use?
It uses LGA 4677 on W790 mainstream workstation boards. A BIOS that lists the refresh is required.
Is the Xeon w5-2555X unlocked?
Fourteen cores and 28 threads at 3.3 GHz base and up to 4.8 GHz boost, with 33.7 MB of cache at 210 W. The multiplier is unlocked.
What memory does the w5-2555X support?
DDR5-4800 RDIMM with ECC in 4 channels.
Can the w5-2555X be upgraded?
Yes, to higher-core W-2500 parts on the same board where power, cooling and BIOS allow.
Sources and verification
- Intel Xeon W-3500 and W-2500 Sapphire Rapids Refresh lineup table w5-2555X 14 cores (Wccftech)
- Intel Xeon W W790 chipset DDR5 workstations memory lanes (Kingston)
Facts last checked against these sources on . Page last edited on .