China’s semiconductor landscape is evolving as Zhaoxin, a leading fabless enterprise, unveils its ambitious server chip, the Kaisheng KH-50000. This next-generation processor, part of the company’s Century Avenue architecture, marks a significant milestone for Zhaoxin, positioning it to compete with industry giants like AMD and Intel. The chip’s chiplet design, reminiscent of AMD’s Ryzen and EPYC processors, enables Zhaoxin to deliver a high core count, challenging AMD’s EPYC 9004 series with up to 96 cores.
The KH-50000 boasts two variants: a flagship 96-core SKU and a more affordable 72-core SKU, both foregoing simultaneous multithreading. With a layout similar to AMD’s, the processor integrates a massive I/O die surrounded by four compute die clusters, each holding eight cores and 32MB of L3 cache. This configuration results in a formidable 96-core processor with 384MB of L3 cache.
Specs for the KH-50000 reveal clock speeds of 2.2 GHz base and 3.0 GHz boost for the 96-core variant, while the 72-core model offers a 2.6 GHz base clock. However, details on power consumption remain undisclosed, although the chiplet design allows Zhaoxin to leverage older process nodes without compromising performance.
Noteworthy advancements include support for 12 channels of DDR5-5200 RAM, up from the previous 2TB DDR4-3200 limit, and the addition of Compute Express Link (CXL) interconnect support. Expansion capabilities have also been enhanced, with 128 PCIe 5.0 lanes and 16 PCIe 4.0 lanes available on the KH-50000.
Security features on the KH-50000 align with China’s encryption standards, incorporating proprietary encryption technologies and a trusted computing chip for enhanced security. The processor’s physical dimensions mirror those of AMD’s latest chips, emphasizing compatibility and scalability within server systems.
Designed for LGA sockets, the KH-50000 supports 2S and 4S systems, accommodating up to 384 cores on the latter. Zhaoxin’s proprietary ZPI 5.0 facilitates inter-chip communication, underscoring the chip’s scalability and potential for diverse server applications.
While Zhaoxin’s foray into the server processor market signifies a significant step towards technological autonomy, challenges remain in competing with established players like AMD and Intel. However, with a growing emphasis on domestic technology production in China, Zhaoxin’s progress underscores the country’s commitment to self-sufficiency in semiconductor innovation.
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