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AMD Ryzen 5 2600X Review: Spectre Patches Weigh In

Rendering, Encoding & Compression

Rendering

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Threaded rendering workloads favor Ryzen's SMT-enabled cores. Ryzen 5 2600X slots in right where we'd expect it to land, while Intel's processors suffer slight performance hits after installing the Spectre mitigation patches. 

Encoding & Compression

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LAME is the quintessential example of a single-threaded workload, normally favoring Intel's per-core performance advantage. AMD's 2000-series Ryzen CPUs go a long way in closing the gap by offering better per-core performance than their predecessors.

Our threaded compression and decompression tests adsorb data directly from system memory, removing storage from the equation. The Ryzen 5 2600X fares well during the test, easily beating Intel's Core i5-8400 and -8600K. Given Windows' new dual page table addressing structure that prevents Meltdown-based attacks, we expected more performance overhead after the patches. However, the company's latest processors have a PCID (Post-Context Identifiers) feature that accelerates page table translations. As a result, older Core CPUs without the PCID feature are likely affected more than the ones we're testing. 

There's a larger delta between Intel and AMD processors during our HandBrake x265 test compared to the x264 benchmark due to its heavier distribution of AVX instructions. The 2600X slots in where we'd expect given its six cores with SMT technology.


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Paul Alcorn

Paul Alcorn is the Deputy Managing Editor for Tom's Hardware US. He writes news and reviews on CPUs, storage and enterprise hardware.