Intel Xeon w9-3575X socket: LGA 4677
The Intel Xeon w9-3575X uses LGA 4677, the LGA workstation socket for Sapphire Rapids Xeon W with W790 chipsets, DDR5 RDIMM memory and 112 PCIe Gen5 lanes. The unlocked 44-core chip at 340 W suits expert workstation boards.
- Socket
- LGA 4677
- Launched
- August 2024
- Cores and threads
- 44 and 88
- Base power
- 340 W
- Codename
- Sapphire Rapids
- Segment
- Workstation
- Family
- Intel Xeon W
- Clocks
- 2.2 / 4.8 GHz
Intel Xeon w9-3575X specifications
| Cores | 44 |
|---|---|
| Threads | 88 |
| Core architecture | Golden Cove (P-cores only, chiplet) |
| Clocks | 2.2 GHz base, up to 4.8 GHz boost |
| Cache | 97.5 MB Intel Smart Cache |
| Processor base power (TDP) | 340 W |
| Maximum turbo power | 408 W |
| Manufacturing process | Intel 7 (10 nm) |
| Memory support | DDR5-4800 RDIMM with ECC, 8 channels, up to 4 TB |
| PCI Express | PCIe 5.0 x112 |
| Integrated graphics | None |
| Multiplier | Unlocked |
| ECC memory | Yes |
| Package | FCLGA4677 (77.5 by 56.5 mm) |
| Launch price | 4168 to 4178 dollars (Intel RCP) |
Motherboard and chipset compatibility
Intel Xeon w9-3575X 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 w9-3575X is
The Xeon w9-3575X is a 44-core and 88-thread workstation processor that Intel launched in the third quarter of 2024 at 4168 to 4178 dollars for expert single-socket workstations. Forty-four Golden Cove Performance-cores with Hyper-Threading and no Efficient-cores give 88 threads at 2.2 GHz base and up to 4.8 GHz boost with 4.6 GHz Turbo 2.0. Cache is 97.5 MB of Smart Cache. Processor base power is 340 W with 408 W turbo, which needs workstation liquid or high-flow air cooling.
The unlocked X suffix allows multiplier and memory tuning where the W790 board enables it. Eight-channel DDR5-4800 RDIMM up to 4 TB with ECC feeds 44 cores plus multiple GPUs from board memory. Up to 112 Gen5 lanes serve GPUs and NVMe RAID from one socket, which avoids dual-socket licensing and latency for many workstation apps.
Expert rendering, simulation and AI data prep fit here. Forty-four cores keep scenes plus builds together without node complexity. Buyers who need 60 cores for maximum throughput should take the w9-3595X flagship instead, since this w9 balances threads with higher base than the top bin.
Socket and motherboard compatibility
The w9-3575X fits LGA 4677 on W790 expert boards with 340 W delivery. Boards accept W-3400 plus W-3500 refresh SKUs with a BIOS that lists the part. The 77.5 by 56.5 mm FCLGA4677 package uses the E1A carrier and workstation ILM.
Memory is DDR5-4800 RDIMM with ECC in 8 channels up to 4 TB. XMP-compatible RDIMM tuning is available on X SKUs where enabled. Population is 1 DIMM per channel at 4800 MT per s or 2 per channel at 4400 MT per s.
Expert shoppers compare W-3500 flagships on cores and cache. The w9-3575X trails the 60-core flagship on threads but leads smaller W-3500 on both. The Socket vs chipset: what decides whether a CPU works guide explains vendor lists.
Memory, PCIe and cooling
DDR5-4800 RDIMM with ECC in 8 channels up to 4 TB is the W-3500 standard. Large scenes plus datasets should be sized together, since 44 cores can feed on bandwidth. Matched octets are preferred for full width.
PCIe gives 112 Gen5 lanes from the CPU plus 28 chipset lanes for multi-GPU, NVMe and 10 GbE. Splits serve dual GPUs plus RAID on expert boards. Fixed wiring means plans must match the manual.
Cooling is workstation 340 W with vendor-qualified liquid or high-flow air to 408 W peaks. No retail cooler ships with tray supply. Torque sequence and inlet control preserve repeat 4.8 GHz behavior.
Upgrade paths
LGA allows expert moves within the vendor list, such as to the 60-core flagship with stronger cooling. Memory and NVMe can also grow to 4 TB and multi-drive arrays. BIOS must support the target.
The mainstream alternative is 4-channel W-2500 for lower cost. A working w9-3575X serves expert desks for years.
Frequently asked questions
What socket does the Xeon w9-3575X use?
It uses LGA 4677 on W790 expert workstation boards. A BIOS that lists the refresh is required.
Is the Xeon w9-3575X unlocked?
Forty-four cores and 88 threads at 2.2 GHz base and up to 4.8 GHz boost, with 97.5 MB of cache at 340 W. The multiplier is unlocked.
What memory does the w9-3575X support?
DDR5-4800 RDIMM with ECC in 8 channels up to 4 TB.
Can the w9-3575X be upgraded?
Yes, to higher-core W-3500 parts on the same board where power, cooling and BIOS allow.
Sources and verification
- Intel Xeon w9-3575X 97.5M Cache 2.20GHz FCLGA4677 specifications (Intel ARK)
- Intel Xeon W-3500 and W-2500 Sapphire Rapids Refresh lineup table (Wccftech)
- Intel Xeon W W790 chipset DDR5 workstations memory lanes (Kingston)
Facts last checked against these sources on . Page last edited on .