Walking through the benchmark path was down to 25 seconds, a very palpable 35 percent increase in walking speed, and at 200fps we finished in 21.5 seconds (at which point we appear to be hitting a CPU bottleneck). Where it really got fun, though, was with our Medium settings on the fastest GPUs, which averaged 168fps.
![fallout 4 why still use the gamebryo engine fallout 4 why still use the gamebryo engine](https://media.moddb.com/images/articles/1/184/183483/auto/1429052878screenshot011.png)
But when our average reached 137fps, the time for our benchmark run had decreased to 31 seconds-not a huge difference, but you could feel it. Our benchmark sequence is 34 seconds long by default, and that tends to be true up until 120fps (give or take). One clear side effect: If your frame rates get above 120fps, the game speeds up.
![fallout 4 why still use the gamebryo engine fallout 4 why still use the gamebryo engine](https://media.game-debate.com/images/news/17269/_id1434963954_1_18.jpg)
In Skyrim, high frame rates could cause dragons to warp around and made the game effectively unplayable on faster systems we didn’t see character/creature warping in our limited testing, but we did notice other problems. This fixes the frame rate cap issue, but just like Skyrim, some things can get a bit wonky after the removal of the FPS cap. First, to do so, just open your Fallout4Prefs.ini file (in your Documents\My Games\Fallout4 folder) and set iPresentInterval=0 (instead of 1)-and note that any time you adjust the setting using the game launcher or change your graphics card, you’ll need to change the setting again, as there’s no global override.