LGA 4677
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| LGA 4677 | |
|---|---|
| Name | LGA 4677 |
| Type | CPU socket |
| Designed for | High-performance servers and workstations |
| Launched | 2021 |
| Form factor | Land Grid Array |
| Contacts | 4677 |
| Memory support | DDR5, DDR4 (platform dependent) |
| Predecessors | LGA 4189, LGA 3647 |
LGA 4677 LGA 4677 is a server and workstation CPU socket platform introduced to support high-core-count Intel Xeon families and enterprise server platforms. It aimed to enable advanced processor features and expanded memory channels for data center workloads, cloud providers, and high-performance computing customers. The socket was adopted by major original equipment manufacturers and featured in platforms from firms such as Dell Technologies, Hewlett Packard Enterprise, and Supermicro.
Overview
LGA 4677 was developed by Intel Corporation to serve next-generation Xeon Scalable processors intended for hyperscale and enterprise deployments. The socket increased pin count relative to predecessors to support wider memory channel configurations, higher power delivery envelopes, and an expanded set of PCI Express lanes for accelerator and storage connectivity. OEMs such as Lenovo, Fujitsu, Cisco Systems, and Inspur produced systems based on the platform for cloud operators like Amazon Web Services, Microsoft Azure, and Google Cloud Platform.
Technical specifications
The socket uses a 4677-pin Land Grid Array to provide electrical and mechanical interfaces between the CPU package and the motherboard. It supports multi-channel DDR5 SDRAM memory standards in many implementations and integrates a high-bandwidth PCIe 5.0 fabric on compatible processors for GPU and NVMe accelerator connectivity, enabling deployments with NVIDIA, AMD, and purpose-built accelerator cards from Intel's own PGA and card portfolios. Power delivery was engineered to accommodate high TDP parts and features like Intel Hyper-Threading Technology, Intel Optane persistent memory interoperability on some platforms, and large L3 cache coherency for scale-up workloads. Hardware partners including Micron Technology, Samsung Electronics, SK Hynix, and Western Digital supplied complementary memory and storage components.
Supported processors and compatibility
LGA 4677 was paired primarily with Intel Xeon Scalable (4th Gen) and select later-generation Intel Xeon SKUs optimized for cloud and HPC. Compatible processor families included SKUs with many cores, big cores and small cores combinations in hybrid architectures, and models offering Intel SGX and TPM integration for secure enclaves used by providers such as Oracle Cloud and Alibaba Cloud. OEM compatibility lists referenced certified CPU stepping revisions and microcode updates distributed via BIOS vendors like AMI, Insyde Software, and Phoenix Technologies.
Motherboard and chipset support
Platforms using the socket were offered with server-grade chipsets and Platform Controller Hub designs by Intel and partner vendors. Major motherboard manufacturers—ASUS, ASRock Rack, Gigabyte Technology, and Supermicro—released boards with enterprise features: multiple M.2 and U.2 NVMe slots, dual 10/25/100 Gigabit Ethernet controllers from Broadcom and Intel Ethernet, hardware RAID options from LSI Logic/Avago Technologies, and BMC solutions utilizing OpenBMC. Chipset support included expanded PCIe lane allocation, enhanced I/O virtualization for VMware ESXi, Microsoft Hyper-V, and KVM hypervisors, and firmware stacks interoperable with Red Hat Enterprise Linux, SUSE Linux Enterprise Server, and Canonical Ubuntu Server.
Cooling and power requirements
High core counts and TDP ratings necessitated advanced cooling solutions from vendors like Noctua, Cooler Master, and OEMs with liquid cooling systems from Asetek and direct-to-chip cold plate designs used by Cray and specialized HPC integrators. Power delivery designs followed specs from Intel VR guides with multi-phase voltage regulators and server-grade capacitor and inductor components from suppliers such as Murata Manufacturing and TDK Corporation. Data centers deploying the socket considered rack-level chilled water, rear-door heat exchangers from Rittal, and ASHRAE thermal guidelines adopted by hyperscalers to maintain reliability.
Launch and market reception
Introduced amid growing demand for AI training, inference, and virtualization density, the socket was highlighted at trade shows including Intel Innovation, Supercomputing (SC), and Open Compute Project events. Early adopters and reviewers from outlets like AnandTech, Tom's Hardware, and StorageReview evaluated systems from Dell EMC, HPE ProLiant, and Lenovo ThinkSystem, noting strong multi-threaded performance and memory bandwidth. Enterprise customers such as Facebook (Meta), Twitter (now X), and research institutions including Lawrence Berkeley National Laboratory and CERN assessed the platform for compute clusters and edge deployments.
Comparisons and alternatives
Competitors and alternatives included AMD's server platforms using sockets like SP3 and SP5 for EPYC processors, and ARM-based solutions from Ampere Computing, Marvell Technology, and Amazon Graviton. Benchmark comparisons often contrasted LGA 4677 systems against AMD EPYC Milan and Zen 4-based servers, as well as ARM offerings from NVIDIA Tegra-class accelerators in heterogeneous compute nodes. System integrators weighed trade-offs between ecosystem maturity from Intel, core counts from AMD EPYC, and power-efficiency gains from ARM vendors when selecting platforms for workloads at organizations such as Netflix, Spotify, and national labs.