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[Vadanarika]

The AMD Ryzen 7 9800X3D is releasing soon this month, and I am around the same time planning an upgrade, and wondering whether or not I can expect better performance from the latest chip, or if I should just go with an older chip.

I remember a while back it being speculated that the primary performance problem with Dwarf Fortress could be made better with large fast CPU cache, which is what the X3D series of CPUs has. I have seen a few anecdotal reports from people on the forums and subreddit that the X3D chips do give better performance, so I am planning to go with one of them, but I am unsure if the latest one will be a noticeable difference versus say the Ryzen 9 7950X3D or the Ryzen 7 7800X3D. There are some people and reviews that have benchmarked Dwarf Fortress world generation, and there doesnt really seem to be that big of a difference (though the difference in factorio is quite big) between the three. However, I also recall putnam a while back once saying that world generation is a useless benchmark due to some anomalies in the music and language generation process, so I don't know if I should take those benchmarks into consideration or not?

I like to make large megaforts spanning many Z-levels with big embarks in multiple biomes, mess with water stuff as well, if that is relevant. Big population is nice too. So DF performance is certainly relevant to me.

[jecowa]

I don't have either, but I wish I did. I doubt that the 9800X3D is all that much better than the 7800X3D for Dwarf Fortress, but the 9800X3D is probably the best Dwarf Fortress CPU in the world, and when it's in-stock, it's about the same price as the 7800X3D, so seems like might as well get the new one if it's available. 7800X3D is build on TSMC's N5, 9800X3D is built on N4. They both have the same amount of cache. The new one has higher RAM speed. Maybe in a couple generations, AMD will move on to N2, and hopefully the backside power delivery will allow AMD to stack more V-cache on the CPU without it overheating.

I'm curious about Putnam's thought on an ideal benchmark. I think world generation is bad just because it's not representative of the majority of play. Who cares how long a world takes to generate unless you plan on doing a lot of world generation. Instead, I would find a good fortress save that causes performance issues, but not due to door problems. Then turn off auto-save, any announcements that open dialogues or pause the game, turn on the pause-on-save-load, load the save, then unpause and time how long it takes for a certain amount of in-game time to pass.

Then do something similar for adventure mode, but at a site that has a high population, since that's probably the biggest issue an adventure mode player will run into.

[jecowa]

This Factorio benchmark is showing 20% improvement in 9800X3D performance over 7800X3D, so maybe it is a big improvement. https://factoriobox.1au.us/results/cpus?map=4c5f65003d84370f16d6950f639be1d6f92984f24c0240de6335d3e161705504&vl=1.0.0&vh=

Factorio is another simulation game with low graphical load.