Intel Core i9-12900K vs AMD Ryzen 9 5900X Performance Review


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.

Memory Read

Intel Core i9-12900K AIDA64 Memory Read Graph

The Intel Core i9-12900K with DDR5 has the highest memory bandwidth we’ve seen on a new platform. It allows 81GB/s of memory read bandwidth, which beats the Ryzen 9 5900X by 50%.

Memory Write

Intel Core i9-12900K AIDA64 Memory Write Graph

The same is also true on memory write performance, with the Intel Core i9-12900K allowing 74GB/s of bandwidth. This is 40% faster than the AMD Ryzen 9 5900X.

Intel Core i9-12900K Cache and Memory Benchmark

Intel Core i9-12900K CPU AIDA64 Cache & Memory Benchmark Screenshot

Above is the AIDA64 Cache and Memory Benchmark. You can see that the memory latency is 76.7ns, L1 cache latency is 1ns, L2 cache latency is 3.5ns and L3 cache latency is 17.6ns. The bandwidths for each cache are also shown. Now let’s see how that compares to the Ryzen 9 5900X.

AMD Ryzen 9 5900X Cache and Memory Benchmark

AMD Ryzen 9 5900X CPU AIDA64 Cache & Memory Benchmark Screenshot

The very first thing we notice is that all the memory and cache latencies are actually lower on the AMD Ryzen 9 5900X. The memory latency is a whole 14ns faster on the 5900X, and the L3 cache is also 7ns lower. This is good, it shows that the L3 cache latencies issues with the AMD Ryzen CPUs is fixed for sure in Windows 11. L1 cache bandwidth is a lot higher on the 12900K for the read, and so is L2, L3 cache performance seems to be faster on the 5900X.

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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