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[Habsfan1997]

Hi everybody,

I have an I5 processor so I don't have problem to run DF but my brother wants to play DF now, but he only have a 2 Ghz cpu with 512mb of RAM.I know this is weak, but if he plays on a small map with a lower population cap, would he be able to play with a correct fps ?

Thanks ! 

[MonkeyHead]

I play on a 1.7GHz dual core laptop running at around 30 fps with 150 to 170 dorfs without much issue other than a lot of heat. I set one core to have affinity with DF set to high priority and dump everything else on the other core. Granted, I limit myself to 3x3 embarks and agressivley atomsmash on maps customized to have only one cavern to save pointless depth. Though the 2 gig of RAM helps a lot I assume.

[HavingPhun]

If you could upgrade the ram it would help but if not don't gen huge worlds. Try smaller worlds with shorter histories.

[Habsfan1997]

But do you think he will be able to play normally ?

[chevil]

Yes.
He may need to use a lower popcap.

[Habsfan1997]

Yes, he will use a lower population cap and if this is not enough, he will turn off the temperature and weather.

[Bobnova]

Should be acceptable with smallish worlds and a low population cap. The RAM may well be a larger issue than the CPU, really.

[Monsieur Fish]

He'll be fine. I use a Thinkpad from 2007 and it runs okay. Now if I can get over that hump at the beginning I'd play all the time.

[Wayward Device]

I used to play quiet happily on a laptop with about double the ram and a slightly shittier processor than the one described. As well as a lower pop cap (I'd set it to 80, IIRC that's the pop threshold for sieges) a smaller embark is your friend. I'd suggest going 3x2 or even 2x2. 2x2 is really all the space and resources you need. I also heartily agree with the suggestion to gave only 1 cavern layer and a shallow world. All that will really help with the pathfinding, which is the biggest lag culprit. Oh, and running water might be a thing to avoid (no 50 tile wide rivers).   

[Il Palazzo]

I can attest from personal experience that it is possible to run DF on a PIII 1GHz with 256MB RAM. The world generation needs to end before the year 100, the embark needs to be 3x3 maximum, with 20 popcap, and weather turned off. With this setup I managed to keep the game at ~15fps initially, and ~5 later on.
The greatest lag was during waiting for the game to initialise after hitting embark, for some reason. 10-15 minutes were a norm.

Anyway, your mate should do fine.

[Mushroo]

I also used to play DF on a pentium 3 with 256mb RAM. I ran in Linux text-mode using nanofort to make a 1x1 embark. Ran pretty well, quite playable.

[Habsfan1997]

Thank you for your helpful reponses