On Tuesday, AMD announced three new additions to its desktop Ryzen CPU line: Ryzen 9 3900XT, Ryzen 7 3800XT, and Ryzen 5 3600XT. The new processor designs are expected to become generally available on July 7, the anniversary of the original launch date of 7nm Zen 2.
The new CPU designs take advantage of newly optimized 7nm process technology to offer higher performance at the same TDPs as Ryzen 3000 designs. The new 3000XT CPUs are drop-in replacements on AM4 motherboards that supported Ryzen 3000 CPUs and offer small (up to 4 percent) single-threaded performance improvements over their Ryzen 3000 counterparts.
| Model | Cores/Threads | Boost/Base Frequency | Total Cache | TDP | Suggested retail price |
| Ryzen 9 3900XT | 12/24 | Up to 4.7GHz/3.8GHz | 70MiB | 105W | $499 |
| Ryzen 7 3800XT | 8/16 | Up to 4.7GHz/3.9GHz | 36MiB | 105W | $399 |
| Ryzen 5 3600XT | 6/12 | Up to 4.5GHz/3.8GHz | 35MiB | 95W | $249 |
Although the single-threaded performance improvements are small, the margins between CPUs in that stat tend to be razor-thin, and AMD says they're enough to take the coveted single-thread performance crown away from Intel. A 4 percent improvement to the Ryzen 9 3900X score shown on the CGDirector leaderboard would come out to 531—a few points higher than CGDirector's posted score for the i9-10900K, although a few points lower than our own Cinebench R20 result for that processor, using an NZXT Kraken fluid-cooler and Primochill Praxis open-air bench.
AMD has determined that most consumers are discarding the free Wraith Spire coolers in favor of higher-performance third-party cooling systems—so in the 3000XT line, only the Ryzen 5 3600XT retains the included OEM cooler. Ryzen 9 3900XT and Ryzen 7 3800XT will require the consumer to supply their own cooling solution, and AMD recommends "a minimum 280mm radiator or equivalent air cooling." The company offers the existing 3950X compatibility list for those who aren't sure what to buy.
For anyone who still isn't certain, that choice of cooling is critical to getting the most out of these processors. It's worth noting that AMD is following Intel's lead in specifying base and boost clocks with "up to" numbers, rather than firm ratings. Users who skimp on the cooling with enthusiast processoRead More – Source
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arstechnica
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