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Intel Core i5 8400 vs. i5 9400F Meltdown/Spectre/L1TF/MDS Mitigation Impact

Submitted by Rianne Schestowitz on Thursday 6th of June 2019 12:33:37 AM Filed under
Graphics/Benchmarks

With recently seeing a deal on the Intel Core i5 9400F processor, I picked it up for testing as part of our Spectre / Meltdown / Foreshadow / Zombieload testing since it features some hardware mitigations and is otherwise quite similar to the unmitigated Core i5 8400 that I also have in the benchmarking farm. Here are some results when benchmarking the Core i5 8400 and Core i5 9400F with and without the current Linux mitigations for these CPU vulnerabilities.

I'll have up my complete Linux review of the Intel Core i5 9400F over the next week or so, but given the interest in the mitigated performance especially after the last round (MDS / Zombieload), here are some metrics comparing just the Core i5 8400 and Core i5 9400F with their mitigations. The Core i5 9400 series is part of the line-up now featuring silicon-level mitigations for Meltdown and hardware/software improvements around Spectre and L1TF. Given the Core i5 8400 is quite similar but without any hardware mitigations, I figured it would be interesting for a benchmark candidate.

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