Intel Xeon Gold 6434H socket: LGA 4677
The Intel Xeon Gold 6434H uses LGA 4677, the 4677-contact LGA socket for Sapphire Rapids server processors. The 8-core high-thermal chip at 195 W needs a server board with DDR5 memory.
- Socket
- LGA 4677
- Launched
- January 2023
- Cores and threads
- 8 and 16
- Base power
- 195 W
- Codename
- Sapphire Rapids
- Segment
- Server
- Family
- Intel Xeon Gold
- Clocks
- 3.7 / 4.1 GHz
Intel Xeon Gold 6434H specifications
| Cores | 8 |
|---|---|
| Threads | 16 |
| Core architecture | Golden Cove (Sapphire Rapids) |
| Clocks | 3.7 GHz base, up to 4.1 GHz turbo (same silicon as 6434) |
| Cache | 22.5 MB Intel Smart Cache (L3) |
| Processor base power (TDP) | 195 W |
| Manufacturing process | Intel 7 |
| Memory support | DDR5 to 4800 MT/s, 8 channels |
| PCI Express | 80 PCIe Gen5 lanes with Flex Bus and CXL per CPU |
| Multiplier | Locked |
| Package | LGA 4677 |
| Cooler in the box | None (server heatsink required) |
Motherboard and chipset compatibility
Intel Xeon Gold 6434H 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 Gold 6434H is
The Xeon Gold 6434H is the high-thermal variant of the 8-core high-clock Sapphire Rapids server processor for LGA 4677 boards from the first quarter of 2023. Eight Golden Cove cores with hyperthreading give 8 cores and 16 threads, with base at 3.7 GHz and up to 4.1 GHz turbo following the same silicon as the 6434. The package carries 22.5 MB of Smart Cache. The 195 W envelope with a higher thermal envelope suits hot aisle data centres that derate standard parts.
High base clock with 4.1 GHz turbo leads Gold per-core speed for latency-sensitive databases. Eight channels of DDR5 feed 8 cores for in-memory work. Eighty Gen5 lanes serve NICs and NVMe across sockets. The H suffix marks thermal qualification above the standard 6434 rather than different clocks.
Hot aisle buyers land here for 6434 clocks with wider thermal headroom at 195 W. Eight fast threads cover transactional workloads, while standard 6434 suits controlled aisles. Server boards need C741 class chipsets with the Gold SKU on the CPU list. The Socket vs chipset: what decides whether a CPU works guide covers server board choice.
Socket and motherboard compatibility
The 6434H fits LGA 4677 on single and dual socket server boards with LGA 4677 retention and server power delivery. Board lists must name the H suffix part for hot aisle qualification. W790 workstation boards target W-series chips instead.
Server chipset choice decides management and IO breadth rather than CPU fit.
Memory, PCIe and cooling
DDR5 to 4800 MT/s in 8 channels feeds 8 fast cores for transactional duty. Population with matched DIMMs holds rated speed.
Eighty Gen5 lanes with Flex Bus and CXL per CPU wire NICs, accelerators and NVMe. Cooling is a 195 W server heatsink rated for higher inlet temperatures than standard parts.
Upgrade paths
On LGA 4677 the 6434H already covers high-clock Gold duty, so upgrades mean memory, NICs and NVMe rather than more cores. Filling memory channels helps in-memory work most.
Outside high-clock Gold, Silver parts on LGA 4677 trim cost for lighter loads.
Frequently asked questions
What socket does the Xeon Gold 6434H use?
LGA 4677 on single and dual socket server boards.
How is 6434H different from 6434?
Same 8-core clocks and cache in a higher thermal envelope variant for hot aisles.
What memory does the 6434H need?
DDR5 to 4800 MT/s in 8 channels.
What cooling does the 6434H need?
A 195 W server heatsink rated for higher inlet temperatures.
Sources and verification
Facts last checked against these sources on . Page last edited on .