AMD Ryzen 9 3900XT and Ryzen 7 3800XT CPU Review

1. Ryzen 9 3900XT & Ryzen 7 3800XT: Zen 2 Boosted2. All-Core and Boost Operating Frequencies3. Manual Overclocking - 4.6GHz Achieved!4. Testing Methodology5. CPU Tests: Cinebench R20 & Blender6. CPU Tests: 7-Zip Decompression & Compression7. CPU Tests: Handbrake H264 & H2658. Memory Tests: Memory Bandwidth and Latency9. Gaming: Red Dead Redemption 210. Gaming: Shadow of the Tomb Raider11. Gaming: The Division 212. Technical: Power Draw, Efficiency, Temperatures13. Value: Cinebench Performance per £14. Closing Thoughts15. View All Pages

7-Zip Decompressing

7-Zip decompression performance on the 3900XT is strong. This is one of the tests where the multi-threaded load does not stress the chip to the point where its power limits inhibit further clock speed boosts. As such, the higher boost clock residency of the 3900XT delivers a performance gain of around 4% over the 3900X.

Versus the Core i9-10900K, the Ryzen 9 3900XT is 29% better performing.

Better boost clock residency also helps the Ryzen 7 3800XT open up a 2.5% performance lead over the 3800X and 3700X.

AMD’s new 8-core chip is 14% faster than Intel’s 8-core competitor, while the 4.6GHz overclocked Ryzen 7 3800XT is quickly gaining considerable ground on the 10-core i9-10900K.

7-Zip Compressing

Memory performance is more influential in the 7-Zip compressing test, and this results in the 3900XT and 3900X showing basically identical performance numbers. The 3900XT is, however, 15% higher performance than the Core i9-10900K.

Better boost clocks for the 3800XT again help it open up a performance lead versus the other 8-core Zen 2 chips, but this time by a very slim margin.

Intel’s Skylake-based architecture also performs better in this compression workload, allowing the similarly priced Core i7-10700K to roughly match its 3800XT competitor.

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