Intel Core i5-12400 CPU Performance Review

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SiSoftware Sandra and AIDA64

SiSoftware Sandra

Intel Core i5-12400 SiSoftware Sandra 2021 Processor Arithmetic Multi-Threaded/Core Graph

We are now testing in the popular SiSoftware Sandra 2021 version.  We are testing the CPU arithmetic section.  In this graph above we are looking at Dhrystone integer performance in multi-threading. The new Intel Core i5-12400 is very strong here, beating even the 5600X and 5600G in performance. It’s 4% faster than the 5600G and 5600X at Integer performance. Compared to the 3600X it’s 18% faster.

Intel Core i5-12400 SiSoftware Sandra 2021 Processor Arithmetic Single-Threaded Graph

In the graph above we are looking at the same test but now run only on a single thread. Once again, the Intel Core i5-12400 is at the level of Ryzen 5 5600X single-thread performance, and slightly faster than the 5600G. It’s 23% faster than the 3600X.

Intel Core i5-12400 SiSoftware Sandra 2021 Processor Multi-Media Multi-Threaded/Core Graph

If there is one weak point in testing it is Processor Multi-Media (MPix/s) Whetstone floating-point testing in SiSoftware Sandra for the 12400. The AMD CPUs have a clear advantage here, but the 12400 is still faster than the 3600X by a few percent. The 5600X is 23% faster.

Intel Core i5-12400 SiSoftware Sandra 2021 Processor Multi-Media Single-Threaded Graph

The same is true in single-thread testing in Processor Multi-Media Whetstone floating-point, but it is not as drastic as multi-threading. The 12400 is not far behind, and it’s still a few percent faster than the 3600X.


We are now going to use AIDA64’s Cache and Memory benchmark to look at RAM memory bandwidth and RAM and cache latencies between both CPUs.

Intel Core i5-12400 AIDA64 Memory Read Graph

The Intel Core i5-12400 has a major advantage in memory bandwidth potential, at 73GB/s versus the AMD CPUs around 50-52GB/s of bandwidth. That’s about a 40% bandwidth advantage to the 12400 with DDR5, and this will vary with the speed of RAM used of course.

Intel Core i5-12400 AIDA64 Memory Write Graph

The memory write bandwidth can be even greater if comparing the 5600X and 3600X, which have a lower memory write than read due to CCD/CCX layout. The 12400 could therefore have a 150% memory write bandwidth advantage, though to the 5600G it is closer.

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Brent Justice
Former managing editor of GPUs at HardOCP for 18 years, Brent Justice has been reviewing computer components since the late 90s, educated in the art and method of the computer hardware review, he brings experience, knowledge, and hands-on testing with a gamer-oriented and hardware enthusiast perspective. You can follow him on Twitter - @Brent_Justice You can sub to his YouTube channel - Justice Gaming You can check out his computer builds on KIT - @BrentJustice

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