Here we can see both a block diagram of the chip and a close-up of a bare Ryzen 7000 chip from the keynote. 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. Intel HEDT: Xeon W-2400 (10nm Golden Cove / 4-Channel DDR5 / 64 PCIe Gen 5 / LGA 4677 SocketFor the workstation segment, we have:ĪMD WS: Threadripper 7000 (5nm Zen 4) / 8-Channel DDR5 / 128 PCIe Gen 5 / 6096 SP5 Socket (Lacks OC capabilities for both CPU & memory).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. HEDT segment lineup:ĪMD HEDT: Threadripper 7000 (5nm Zen 4) / 4-Channel DDR5 / 64 PCIe Gen 5 / 4844 SP6 Socket Let's now compare and see how they stack up. Ryzen Threadripper PRO 7900 CPUs as listed under the "79x5WX" family for workstation PCs, and the Ryzen Threadripper 7900 CPUs as the "79x0X" family for HEDT PCs. So based on the document, we have 2 families. LGA-6096 (SP5) for WS, and LGA-4096 (SP6) or most likely LGA4844 socket for HEDT. Zen 4 Threadripper should be a quadruple CCD version of AMD's Ryzen 7000 desktop CPUs, with massive improvements to core counts, memory channels, PCIe lanes, and I/O
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