KaiXian
Developer	Zhaoxin, VIA Technologies
Manufacturer	TSMC, HLMC
Type	Microprocessors
Introduction	2016 (announced) 2016 (launch)
ISA	x86
µarch	Isaiah, Zhangjiang, WuDaoKou, LuJiaZui
Word size	64 bit 8 octets 16 nibbles
Process	40 nm 0.04 μm 4.0e-5 mm , 28 nm 0.028 μm 2.8e-5 mm
Technology	CMOS
Succession
←
QuadCore

KaiXian (ZX/KX) is a family of x86 microprocessors developed by Zhaoxin for the Chinese market.

Overview

KaiXian is a family of x86 microprocessors designed by Zhaoxin as part of China's national security initiative which attempts to reduce the reliance on foreign technology (e.g., Intel) and to gain greater control over their intellectual property. Those processors are x86-compatible with Intel's processors and are capable of booting all modern operating systems such as Red Hat Enterprise Linux and Windows 10.

Models

KaiXian ZX-A

Main article: VIA's Isaiah

KaiXian ZX-A were the first series of processors released by Zhaoxin. Those processors were based on the same architecture as VIA Technologies Isaiah and were manufactured on a 40 nm process. For all practical purposes, those chips are identical to VIA's Nano parts.

KaiXian ZX-B

ZX-B series models were identical to ZX-A except that they are fabricated in mainland China on HLMC's 40 nm process.

KaiXian ZX-C

Main article: ZhangJiang microarchitecture

ZX-C which is based on the ZhangJiang microarchitecture introduced a number of enhancements including extending the architecture to support up to 8 cores. With many respect they are very similar to VIA's QuadCore. Since those parts were manufactured on TSMC's 28 nm process, they have lower power consumption and thus higher clock speed.

KaiXian KX-5000

Main article: WuDaoKou microarchitecture

Announced at Semicon China 2017, the KX-5000 (formerly ZX-D) introduces the largest set of the improvements. Those SoCs are based on WuDaoKou, fabricated on HLMC's 28nm, and is considered the first truly zhaoxin-developed architecture. Among the many improvements such as higher integration (incorporating the GPU and memory controller on-die), those processors now support dual-channel DDR4 memory and support supports HD 4K decoding.

• ISA: Everything up to AVX (SMM, FPU, NX, MMX, SSE, SSE2, SSE3, SSSE3, SSE4.1, SSE4.2, AES, SM3, SM4, and AVX)
• Tech: VT-x/EPT, TXT
• Mem: Up 64 GiB of dual-channel 2133 MT/s DDR4

	List of WuDaoKou-based KaiXian Processors
Model	Launched	Cores	L2	Frequency
KX-5540	28 December 2017	4	4 MiB 4,096 KiB 4,194,304 B 0.00391 GiB	1.8 GHz 1,800 MHz 1,800,000 kHz
KX-5640	28 December 2017	4	4 MiB 4,096 KiB 4,194,304 B 0.00391 GiB	2 GHz 2,000 MHz 2,000,000 kHz
KX-U5580	28 December 2017	8	8 MiB 8,192 KiB 8,388,608 B 0.00781 GiB	1.8 GHz 1,800 MHz 1,800,000 kHz
KX-U5580M	28 December 2017	8	8 MiB 8,192 KiB 8,388,608 B 0.00781 GiB	1.8 GHz 1,800 MHz 1,800,000 kHz
KX-U5680	28 December 2017	8	8 MiB 8,192 KiB 8,388,608 B 0.00781 GiB	2 GHz 2,000 MHz 2,000,000 kHz
Count: 5

KaiXian KX-6000

Main article: LuJiaZui microarchitecture

The KX-6000 (formerly ZX-E) is a planned series of processors based on LuJiaZui set to be fabricated on TSMC's 16 nm.

• ISA: Everything up to AVX (SMM, FPU, NX, MMX, SSE, SSE2, SSE3, SSSE3, SSE4.1, SSE4.2, AES, SM3, SM4, and AVX)
• Tech: VT-x/EPT, TXT
• Mem: Up 64 GiB of dual-channel 3200 MT/s DDR4

	List of LuJiaZui-based KaiXian Processors
Model	Launched	Cores	L2	Frequency
KX-U6880		8	8 MiB 8,192 KiB 8,388,608 B 0.00781 GiB	3 GHz 3,000 MHz 3,000,000 kHz
Count: 1

See Also

• Loongson