Leak: AMD Zen 6 'Powderhorn' B0 silicon tapes out - Targeting late 2026 to rival Intel's Nova Lake

A report from hardware insider, Moore's Law Is Dead, states that AMD's next-generation Zen 6 desktop silicon is much closer to mass production. The Zen 6 desktop Core Complex Die (CCD) and its X3D counterpart, codenamed "Powderhorn", have officially taped out in their B0 silicon stepping. This could mean a holiday 2026 launch or a formal debut at CES 2027.

AMD's next-generation Zen 6 desktop CPUs represent a massive design overhaul rather than a minor refresh. The new architecture is expected to deliver a 50% increase in both core counts and L3 cache per Core Complex Die (CCD).

Instead of the traditional 8 cores per CCD, Zen 6 increases this density to 12 standard cores per die. Simultaneously, the L3 cache pool per CCD grows from 32 MB to 48 MB. More importantly, Zen 6 CPUs are also expected to be compatible with existing AM5 motherboards.

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Moore's Law Is Dead alleges that AMD has Zen 6 CCDs in their B0 stepping, freshly taped out from TSMC. If engineers spot bugs or flaws in this initial silicon, they issue revisions to fix them. These hardware updates can be major architectural overhauls, signified by changing the letter, such as moving to B0, or minor metal-layer tweaks, which simply increment the design number to A1.

AMD has a history of shipping chips quickly with few revisions. The Radeon RX 7900 XTX graphics card, for example, shipped on its original A0 stepping. Because of this track record, MLID notes that reaching the B0 stepping means Zen 6 is essentially production-ready. With the silicon already alive in labs, we might even see CEO Dr. Lisa Su hold up a physical chip at Computex next week.

AMD's recent confirmation that its 6th Gen EPYC "Venice" server processors have officially entered production ramp on TSMC's 2nm node strongly reinforces this notion. Because AMD relies on a modular design, the underlying Zen 6 CCDs are likely shared across both data center and consumer lines. Venice scaling up for high-volume manufacturing reaffirms MLID's stance.

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AMD's Zen 6X3D chiplets have reportedly reached B0 status as well. This is an unusual development because stacking 3D V-Cache is a complex, multi-stage packaging process that typically delays X3D models by months compared to standard variants. The leaker suggests AMD may debut standard Zen 6 variants alongside their X3D counterparts this time.

With Venice officially slated for a 2026 debut, it is possible that AMD is planning a consumer desktop release this year as well. MLID hints towards a release window between December 2026 and January 2027. Finer microarchitectural details, exact specifications, and product lines remain under wraps for the time being. We can expect to see more from AMD at Computex next week.