Zen 6c matches fastest Zen 5 server CPU in reviewer's SPECint test

AMD's Zen 6c matched the company's fastest Zen 5 server CPU in SPECint 2026 despite a lower clock speed, Chips and Cheese interviewer George Cozma said in a discussion with AMD architect Mike Clark. Cozma also reported measuring sustained L2 cache reads of 64 bytes per cycle. Clark said Zen 6c uses larger internal queues and 4MB of L3 cache per core, with 32 cores sharing 128MB. Those queues help tolerate higher cache latency. The design targets a lower frequency than Zen 6's high-frequency cores; Cozma said he had tested Zen 6c but had not yet tested Zen 6.