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.
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%.
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
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
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.