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[Myiagros]

My laptop which has an AMD Tri-Core and 4GB ram can do 100fps easy on embark of 4x4. With 100 dwarfs it drops to around 45-50. My PC which I built around 2008 with a Dual Core and 4GB ram sits at 100fps on any embark I've tried, I've never adjusted the fps to see what it can do though, it runs Skyrim on max with no hiccups though.

[janglur]

Current fort:

140-170 FPS
Year 2
79 dwarves
28 animals
4x4 area
Temp/Weather/Etc all On
Fortress proper located near surface (top 8 layers)

Average surface variation:  0 z-layers

Total layers:  117

Brook
Flowing fluids in well
Magma struck
Magma flowing
1 of 3 caverns revealed

PC:
AMD Phenom II X720 (2.8 GHz)
4 GB DDR2-1066 5-5-5-15-30-2T timings, dual channel, unganged

[Angel-of-Dusk]

I get around 120-150, but 150 is my cap so im not sure how high it goes,

while this is also true in vanilla, thanks to MasterworkDF i can keep 120-150 fps at 120-150 dwarfs.
i would recommend MasterworkDF to anyone with FPS issues. and yes i am recommending it in every single thread where someone complains about fps.

My only gripe with MasterworkDF is it removes so much stone from the game. I like pretty colors and geography. And damn it, I like microline.

that's toggleable btw. but it is one of the minor fps savers of the mod.

The decrease in boulder appearing and the number of stones isn't.

[bombzero]

it runs Skyrim on max with no hiccups though.

AAA games are all graphics and flare, usually with little focus on core mechanics compared to DF.

fps issues come from the fact that 'gaming computers' are built graphics heavy, not processor heavy.

[AWdeV]

3 by 3 embark. 190 dwarfs, hundreds of dead things, 40-ish other and a small hundred animals.

Average FPS is 15.

[Draxxalon]

I usually get 900+ upon embark on a 4x4. I have it capped to 200. Incidentally, if you set all your digging designations right after embark at 900fps your miners will dig out half your fort in about a minute.

Currently with 180 dwarves and a multiple biome river I still get 200 (capped), with temp etc. turned on.

i7 920 @ 3.4GHZ, 6GB 1600 OCZ DDR3. Barely uses more than 20% of my cores though. Wish it threaded better.

DF doesn't "thread" at all.   It's single threaded, and a long-discussed thing about whether Toady should work on multi-threading (I wont go into that here, there's several threads here about it already).   

Open up task manager, and set the affinity of the DF process to one "core" (I7's are hyper-threaded, which creates virtual cores for each real core - the game doesnt care whether it's real or virtual though).   If you set the game to 1 core, you'll see it eat 100% of the core.  Set it to two, 50%ish, etc, etc.   I say 50ish because there is some overhead associated with tossing the execution of that single thread across cores, as well as said core being used by other things like the OS. 

The OS task-swaps that thread across all your cores for a couple reasons, generally overall load-balancing, which in turn also helps reduce the strain on the actual physical core (basically, running 1 core at 100% is going to make that one core run hot, which is innefficient, and potentially damaging to the core itself).   The (usually) minor overhead of swapping tasks around is worthwhile when compared to the power usage and inheritted heat (and risk of cooking the hardware).

DF is "CPU bound" - which is to say, Core speed is king, as long as you dont have any excessively slow other components in the mix.

[WaffleEggnog]

Most of the time 20-30 at 150 dwarves, though i can hold out until like 5, as im used to playing games at evily low FPS