undefined | Better HN

0 pointsribit4y ago0 comments

“Official sources” in this case is testing done by me personally. I am the author of the post on RWT linked previously. I would be happy to share my benchmarking code for your scrutiny if you want. The M1 variant tested was base M1 in a 13” MacBook Pro.

I don’t know what your friends have tested but the results make zero sense. Firestorm reaches 1700 points in GB5 at 5W. Pi 4 is under 300 at similar wattage.

0 comments

bullen4y ago

How do you measure watts?

First answer on google: "maximal power consumption is around 50 watts"

Firestorm is GPU (again google has little info) I'm talking CPU for the Raspberry.

The Raspberry 4 GPU uses 1W. You are conflating because of sunk cost.

You need to compare the same things, apples to apples (no pun) one CPU core on Raspberry consumes 1W on the M1 they are 4W

GPU is 1W vs 5W (if you are correct which I HIGHLY doubt, I suspect 20W for the GPU alone, wikipedia states 39 watts at maximum load so yes 20W for the GPU)!

You need to start looking at the world objectively and understand how it really works, because peak energy is not going to be forgiving if you don't.

ribitOP4y ago

By using the provided system tools that report power usage of the GPU cluster? Also, I am telling you the system diagnostics output if an actual physical machine. What are you quoting Wikipedia for? You can literally go measure these things. Should I go edit Wikipedia so that you get correct information?

Anyway, power usage of M1 variants has been studied in detail. It’s 5 watts peak for a single performance core, 20W peak for a CPU cluster of four cores, 10W for a 8-core GPU (128 FP32 ALUs per core). Bigger M1 variants have respectively higher power consumption because of the larger interconnects/caches etc. DRAM is also a factor. Running at full bandwidth is can consume over 10W of power.

saagarjha4y ago

Firestorm is not a GPU, it's a microarchitecture for the large cores on M1.

j / k navigate · click thread line to collapse