# SpacemiT V100: 46-core RISC-V server CPU claims first full RISC-V Server Spec compliance

> **Key takeaway:** SpacemiT's V100 is claimed to be the first processor to fully comply with the RISC-V Server Specification, enabling mainstream Linux distributions to boot without platform-specific modifications.

**Published:** 2026-10-20T02:46:01+00:00 
**Source:** LinuxGizmos 
**Category:** open-hardware 
**Canonical URL:** https://fosswire.org/news/spacemit-v100-46-core-risc-v-server-cpu-claims-first-full-ri.html 

## Summary
SpacemiT has introduced the V100, a server-class RISC-V processor with 46 cores in a hybrid architecture combining six XiangShan Kunminghu V2R2 cores and 40 SpacemiT X100 cores. The chip supports up to 92 cores in dual-socket configurations, DDR5-4800 memory, and PCIe 5.0. The company claims it is the first processor to fully comply with the RISC-V Server Specification, with a firmware stack incorporating UEFI, ACPI, SMBIOS, OpenSBI, and SBI v3.0. Supported Linux distributions include Ubuntu, Debian, Fedora, Red Hat, Rocky Linux, openEuler, openKylin, and openRuyi.

## V100 architecture and server platforms
- **Hybrid core design**: 6x XiangShan Kunminghu V2R2 (13-stage, six-issue OoO, 2.1GHz, 1MB private L2) + 40x SpacemiT X100 (12-stage, four-issue OoO, 2.4GHz, 2MB shared L2)
- **Memory**: 8-channel DDR5-4800, 307GB/s bandwidth, up to 2TB per socket (4TB dual-socket), with RDIMM and sideband ECC support
- **I/O**: 52 PCIe 5.0 lanes; 64MB system-level cache
- **Process/TDP**: 12nm, 120W
- **ISA features**: RVA23 profile, 256-bit RISC-V vector, vector cryptography, RISC-V hypervisor extension, PMP/ePMP
- **Firmware compliance**: UEFI, ACPI, SMBIOS, OpenSBI, SBI v3.0; passes UEFI Self Certification Test (BRS-I)
- **Virtualization**: KVM via upstream Linux kernel with H extension, AIA, and IOMMU
- **Server variants**: C2201 (2U compute, 12 U.2 NVMe bays), G5201 (4U AI, 8x FHFL accelerators, 400Gbps RDMA), S5236 (storage, up to 64 drive bays)

## Why it matters
If the compliance claims hold, the V100 could reduce fragmentation in the RISC-V server ecosystem by providing a standardized platform that mainstream Linux distributions can target without vendor-specific patches. This addresses a longstanding barrier to RISC-V adoption in data centers.