#ZEN 4 PROCESSORS PC#

It is also possible that this close orientation is due to some type of advanced packaging interconnect between the two chips (CoWoS-R?), but that seems unlikely. In addition, the actual pics show what appears to be a shim between the two core chiplets, which is likely to maintain an even surface atop the two dies. AMD says these are based on an optimized version of TSMC's high-performance 5nm process technology, likely referring to N5, and they are placed much closer together than we've seen with previous Ryzen core chiplets. The chip houses two 5nm core chiplets, each sporting eight cores. Here we can see both a block diagram of the chip and a close-up of a bare Ryzen 7000 chip from the keynote.

#ZEN 4 PROCESSORS PC#

This is to say there's a chance Zen 4's increased L2 capacity will pay off more handsomely for the EPYC Genoa server chips than it will for most desktop PC applications. Larger L2 caches generally reduce 元 cache accesses (theoretically by ~40% in this case), which reduces contention on the fabric, thus enabling better scalability and performance in all-core workloads - as opposed to enabling big boosts to single-threaded work. However, with Intel's chips, we've seen larger L2 caches primarily benefit data center workloads. If so, that oddly places Intel's chips at a disadvantage as they have disabled AVX-512 functionality due to the hybrid architecture.ĪMD has also doubled the L2 cache per core to 1MB for Zen 4, giving the execution cores a heftier slab of near memory for workloads. However, we know from the Gigabyte hack that Zen 4 supports AVX-512 instructions, so these are likely the unnamed instructions. The Ryzen 7000 processors come with expanded instructions for AI acceleration, but AMD isn't sharing details yet. We'll dive into performance comparisons a bit further below, but it looks like we'll see a closer-than-expected race between Ryzen 7000 and Intel's Alder and Raptor Lake chips. If AMD sticks to its standard use of PPT x 1.35x = TDP, that means we'll see AM5 socket chips top out at a 125W TDP.

To that effect, AMD also boosted the maximum power delivery of the AM5 socket (PPT) that will house the Ryzen 7000 chips to 170W, a 28W increase over the previous-gen AM4 socket's 142W peak. That means the 15%+ figure isn't based solely on IPC improvements, but improved single-thread performance does boost performance across the board as it is amplified as workloads spread across the cores. However, that comes with the standard caveat that this frequency only applies to a single core during a light bursty workload, just as we've seen with Zen 2 and Zen 3 processors. AMD says the chips will reach 'significantly above' a 5 GHz peak frequency and even demoed a 16-core model hitting 5.5 GHz. AMD tells us that this comes as a mixture of instruction per cycle (IPC) and frequency improvements, but won't share the specific percentage each factor contributes until later. The biggest news for the 5nm Zen 4 chips comes as a 15% or better improvement in single-threaded performance over the previous-gen Zen 3-powered Ryzen 5000 processors.

Zen 4 processors