Zen 3 ram speed8/24/2023 ![]() Zen 2 vs Zen 3 Front-End: Zero Bubble Branch Prediction and Faster Op-Cacheįrom a higher level, there are three primary changes to the Zen 3 front-end: an improved branch predictor, with faster sequencing and switching of the Op-cache fetches and pipes, respectively. The bandwidth is also notably lower: 21GB/s for multi-core and around 35GB for the multi-threaded benchmark. The worse case is twice as much as the core is forced to communicate across the two CCXs. In comparison, the Zen 2 based 3600X has an inter-core latency of 53-54ns (best-case) with the rest of the cores in the same CCX. The Ryzen 5 5600X features a core-to-core latency of just 25-27ns with all the cores in the CCX, with a bandwidth of 30.66GB in multi-core and 67.64GB in multi-threaded tests. The inter-core latency and bandwidth, on the other hand, are a huge step up with the Zen 3 based processors. The sequential access pattern (SAP) test shows the opposite results, with the 5600X performing just a tad bit better than the 3600X. The average cache latency of the 5600X is 57-61ns while the 3600X is much faster at just 39ns. North of that, it grows to as much as 75 clocks. In the in-page RAP test, the Ryzen 5 3600X becomes faster than the 5600X once you cross the data-set size of 128KB, with the delta being relatively small until 16MB. The latency benchmarks show similar results. As the amount of data being transferred increases, the delta between Zen 3 and Zen 2 increases and upon crossing the 4MB threshold, the Ryzen 5 3600X effectively has a higher cache bandwidth compared to the 5600X, roughly by around 200GB/s which is rather significant. The multi-core bandwidth test is more interesting. Running SiSoft’s cache bandwidth benchmark, you can see that for single-threaded workloads, Zen 3 provides notably higher bandwidth compared to Zen 2. A larger cache generally also means higher latency, but AMD hasn’t said anything about that. Each core has access to twice as much last-level cache, allowing them to access much more data compared to Zen 2. This supposedly improves the cache hit rates, reduces latency, cache bandwidth as well as decreasing the core-to-core latency. The most obvious change with Ryzen 5000 CPUs is a newer, wider CCX layout, featuring 8 cores instead of four, sharing the same 32MB of 元 cache. The Zen 3 CCX: 8 Cores w/ 32MB Shared 元 Cache These gains are the result of a reworked chiplet topography, a wider execution backend, increased load-store bandwidth, and something AMD calls “no-bubble” branch prediction. ![]() With the Zen 3 core, the company claims an IPC boost of 19% over Zen 2 which is even higher than the 15% figure that the latter boasts over Zen. SuperPi (v1.5 from Techpowerup, PI value output) 16K: 0.100s 1M: 8.255s 32M: 7m 45.AMD announced its Ryzen 5000 processors at the end of last month, promising massive improvements in gaming and single-threaded performance. CPU:i7-2600K 4751MHz 1.44V (software) -> 1.47V at the back of the socket Motherboard: Asrock Z77 Extreme4 (BCLK: 103.3MHz) CPU Cooler: Noctua NH-D15 RAM: Adata XPG 2x8GB DDR3 (XMP: 2133MHz 10-11-11-30 CR2, custom: 2203MHz 10-11-10-26 CR1 tRFC:230 tREFI:14000) GPU: Asus GTX 1070 Dual (Super Jetstream vbios, +70(2025-2088MHz)/+400(8.8Gbps)) SSD: Samsung 840 Pro 256GB (main boot drive), Transcend SSD370 128GB PSU: Seasonic X-660 80+ Gold Case: Antec P110 Silent, 5 intakes 1 exhaust Monitor: AOC G2460PF 1080p 144Hz (150Hz max w/ DP, 121Hz max w/ HDMI) TN panel Keyboard: Logitech G610 Orion (Cherry MX Blue) with SteelSeries Apex M260 keycaps Mouse: BenQ Zowie FK1
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