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kllrnohjyesterday at 9:31 PM1 replyview on HN

Your 9900k at 5ghz does work slower than a Ryzen 9800X3D at 5ghz. A lot slower (1700 single core geekbench vs 3300, and just about any benchmark will tell the same story). Clock speed alone doesn't mean anything.


Replies

mikrlyesterday at 10:13 PM

From the newegg listing:

>8 Cores and 16 processing threads, based on AMD "Zen 5" architecture

which is the same thread geometry as my 9900K.

My main concerns at the time were:

1. More cores for running large workloads on k8s since I had just upgraded to 128G RAM

2. More thread level parallelism for my C++ code

Naively I thought that, ceteris paribus and assuming good L1 cache utilization, having more physical cores with a higher clock rate would be the ticket for 2.

Does the 9800X3D have a wider pipeline or is it some other microarchitectural feature that makes it faster?

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