Zhaoxin
CPUServerReleased Dec 28, 2017

Zhaoxin KH-26800

8C/8T

The KaiSheng KH-26800 is the faster of the two 8-core models in Zhaoxin's KH-20000 server processor series, launched in December 2017 and running at 2.0 GHz. It is built on Zhaoxin's in-house WuDaoKou microarchitecture as a single-chip SoC and is aimed at servers, storage and embedded networking equipment. Compared with Zhaoxin's KX-5000 desktop processors announced at the same time, it adds ECC and registered DDR4 memory support and has no integrated graphics. Zhaoxin describes the KH-20000 series as the first domestically developed general-purpose server processor in China to support DDR4 memory, and it provides hardware acceleration for the Chinese SM3 and SM4 cryptographic algorithms.

General

Manufacturer
Zhaoxin
Model
Zhaoxin KH-26800
Segment
Server
Generation
KH-20000
Codename
WuDaoKou (ZX-D)
Architecture
x86_64
Microarchitecture
WuDaoKou
Release date
Dec 28, 2017
Price
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Cores & clocks

Cores / threads
8 cores / 8 threads
Base clock
2.00 GHz
Boost clock
—
TDP (design W)
—
Unlocked
✕ No
L2 cache
8 MB
L3 cache
—
Technology (nm)
28 nm
TSMC 28 nm

Platform

Socket
—
2-CPU (multi-socket)
✕ No
Integrated GPU
None
Memory type
DDR4
2-channel
Memory size
Up to 128 GB
ECC memory
✓ Yes
PCIe
PCIe 3.0, 24 lanes

Instructions & AI

Instruction extensions
x86-64SSE4.2AVXSM3SM4VT-x
NPU
None

OS support

Notes
Zhaoxin processors do not appear on Microsoft's Windows 11 supported-processor lists, which cover only AMD, Intel and Qualcomm. macOS is not supported.

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