This is interesting:
All things put into perspective, Fallout 4 does hold 30fps as a general rule, but drops are noticeable. For example, moving between major city areas is a particular strain on the engine, causing PS4 and Xbox One to drop to 20fps in matching spots on the map. Like clockwork, each platform lurches downward for a spell when passing a threshold in the environment - suggesting assets are being decompressed on the fly for the next location. 30fps is restored relatively quickly on arriving at the next spot, and it's business as usual from there. However it's not an ideal setup when these connecting areas are filled with enemies, and controller response suddenly takes a hit - though PS4 holds a frame-rate advantage in matching runs.
On top of this, Xbox One is unique in its suffering of a stuttering issue, halting the game experience for up to a second during play. It's a glaring hitch downward, and matching runs to the gates of Diamond City shows Xbox One dropping to a record 0fps (zero) while PS4 turns the same corner at 28fps. Each has their blips, but having tested two separate Xbox One and PS4 consoles, the results are always the same across the world at large; we get sizeable stutters on Microsoft's console that aren't present on PS4.
For now though, evidence so far suggests those buying Fallout 4 on console should get an overall smoother experience from PS4. It's far from perfect, and we have a suspicion re-tests will be due once each machine receives new patches down the line. As ever, we'll update as new information comes in. Meanwhile, for those with PC as their platform of choice, all the signs look good for a smooth experience even on budget kit. We're currently putting together an in-depth guide to settings tweaks and recommended setups, so expect that in the next couple of days.
http://www.eurogamer.net/articles/digitalfoundry-2015-fallout-4-performance-analysis
The PS5 Exists.
