New leaks about AMD’s Zen 6 Venice CPUs have surfaced, presenting a seemingly perplexing configuration: a “Dense” version with 256 cores manufactured on TSMC’s N2 process, and a “Classic” version with 96 cores on the N2P node. This raises a key question: why would AMD allocate the more advanced N2 process to the lower core count variant and N2P, an evolution of N2, to the higher core count version?
Logically, one would expect the opposite, reserving the cutting-edge node for the configuration with the most cores. This leak, if accurate, leaves many questions unanswered. The implications could extend to AMD’s PC and laptop offerings if the timelines align with previous reports.
Zen 6 Venice: A Seemingly Illogical Node Allocation?
The confusion stems from N2P being an advancement over N2. Why would AMD opt for N2P for the 96-core variant and N2 for the 256-core “Dense” version? While AMD and TSMC haven’t officially confirmed this, several technical factors could explain such a decision, suggesting a logical approach rather than a misstep by AMD.
TSMC touts N2 as its leap to Nanosheet transistors, offering significant improvements over N3E. Officially, N2P further enhances the N2 family. It maintains the same design rules as the base N2 node but promises 5% more performance, 18% greater speed at the same power consumption compared to N3E, 36% lower power consumption at the same speed, 1.2x higher logic density, and 1.15x higher chip density. In essence, N2P is superior, but not necessarily the best choice for every product in every scenario.
This is where the “Venice Dense” configuration, featuring a maximum of 256 cores, comes into play. If this variant is based on Zen 6C, its objectives might differ from a full Zen 6P CPU. The priority could be maximizing core count per socket, managing power consumption, controlling die area, and achieving the highest possible multi-threaded performance within thermal limits. In this context, N2 might suffice if the Zen 6C design is already optimized for density and efficiency, without the need to push for very high frequencies.
Yield Rate and Cost Appear to Be Key Drivers for AMD’s Venice Strategy
Production volume is likely a significant factor in AMD’s decision. A “Dense” variant requires a vast number of functional chiplets. If N2 is more mature or has better initial availability, AMD might prefer to manufacture the compact Zen 6C chiplets on this node. Server processors prioritize cost per wafer, manufacturing yield, binning, and actual supply capacity, not just the fastest node.
The “Venice Classic” variant, with its 96 cores (presumed to be full Zen 6), might be geared towards higher per-core performance, increased clock speeds, more cache per core, and better electrical margins. For this profile, N2P appears to be a better fit, as that additional 5% performance over N2 could be more valuable in workloads where per-thread performance and frequency are paramount over raw density.
The simplest explanation is the use of N2 for scaling efficient cores in mass production and N2P for squeezing more performance out of fewer cores. While not the most intuitive interpretation, this is a viable strategy if AMD is segmenting “Venice Dense” and “Venice Classic” based on distinct objectives and, crucially, different temporalities for their tape-out.
However, it’s important to keep an open mind. The leak is brief and doesn’t clarify if these represent final plans, stepping stages, timelines, internal samples, or a partial roadmap. If the information is correct, Venice might not indicate that N2P is “unworthy” of 256 cores. Instead, AMD could be prioritizing N2’s maturity, density, cost, and efficiency for Zen 6C, while reserving the more refined node for Zen 6 processors focused on maximum per-core performance.
