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Comment by wizee | Hacker News Reader

The RK3588 does seem to comfortably beat the Xeon D-1700/D-2700 series at performance per watt and per dollar.

Compare the RK3588 to the Xeon D-1718T as an example:

RK3588: https://browser.geekbench.com/v6/cpu/5757475

Xeon D-1718T: https://browser.geekbench.com/v6/cpu/945

This Xeon is a 46W TDP part with a $274 USD unit price for the CPU alone. The RK3588 has a ~11W TDP and entire Orange Pi 5 boards can be bought for around $120 USB. The RK3588 can get around 62% of the multicore performance for around a quarter the power budget and vastly cheaper SBC prices compared to Xeon D series servers.

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TDP is heat watts, not electricity watts.

To measure electricity, you need to actually measure it. It's not a specified value. It also depends on workload.

You will find that way high performance, all chips use more Watts than you expect.

But given most of the benchmarks I've seen, Xeon and EPYC hold firm as the most obvious powet-efficient and power-perfirmant chips in practice.

Apple M1 is pretty much the only chip in this discussion that's in the running. And only in 64-bit performance at that, the AVX512 units in Xeon are too good otherwise.

EPYC is decent, Xeon has a long way to go still.

You mention actually measuring it, that's exactly what I've been doing in my top500 project: https://github.com/geerlingguy/top500-benchmark#results

The RK3588 gets up to 4.64 Gflops/W, only beaten by a couple expensive Ampere Altra chips in my testing so far.

A few of the newest EPYC chips touch that range, but none of the Xeons I've seen do (yet). I would like to test a few more but getting access to bare metal is tough, especially since I only need it for a day or two, but need to get it plugged into a consistent power monitoring device.

Interesting project!

Well, good luck with it. If you're using HPC Linpack, that could be a x2 multiplier difference between your results and my napkin math, as I've been assuming 32-bit Floats, while Linpack is 64-bit Floats IIRC.

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