Some quotes from review "conclusion" pages and also a list of reviews in one spot.
These quotes are just focused on the gaming aspect. However, if you do other things then this should be a consideration if you can afford it because anything multi threaded it chews up well.
Ryzen Threadripper gaming performance:
For all the good stuff we saw on the CPU-centric testing, if you've read all the earlier Ryzen coverage, you can probably already guess that Threadripper doesn't really change the formula. Other than a few games now having tuned builds that run better on Ryzen, in general Intel wins the gaming tests. Of course, this is at 1080p ultra quality, using a GTX 1080 Ti—which honestly isn't that far off what I'd expect any gamer considering Threadripper or Core i9 to be running. Anyway, a slower GPU would show far less difference, and running at 1440p or 4K would also narrow the gap. But if you want maximum gaming performance, AMD still has some work to do.
Despite Threadripper's design arguably being better tuned to highly threaded workstation-like workloads, the fact that it still has high clocks compared to Ryzen 7 means that gaming is going to be a big part of the equation too. In its default Creative Mode, Threadripper’s gaming performance is middling at best: very few games can use all those threads and the variable DRAM latency means that the cores are sometimes metaphorically tripping over themselves trying to talk to each other and predict when work will be done. To solve this, AMD is offering Game Mode, which cuts the number of threads and focuses memory allocations to the DRAM nearest to the core (at the expense of peak DRAM bandwidth). This has the biggest effect on minimum frame rates rather than average frame rates, and affects 1080p more than 4K, which is perhaps the opposite end of the spectrum to what a top-level enthusiast would be gaming on. In some games, Game Mode makes no difference, while in others it can open up new possibilities.
If I were to turn around and say that Threadripper CPUs were not pure gaming CPUs, it would annoy a fair lick of the tech audience. The data is there – it’s not the best gaming CPU. But AMD would spin it like this: it allows the user to game, to stream, to watch and to process all at the same time
Source: List of different review sites to peruse
As you may have already guessed, these massive thread-happy processors represent a poor value for any gaming-focused system. I’ve said this once and I will say it again: this isn’t an AMD-exclusive issue but rather one that’s endemic of every capable yet low-clocked 8+ core processors. When compared against the likes of Ryzen 5 / 7 or Intel’s i7 series, the i9 and Threadripper CPUs suffer from a serious case of framerate envy due to their very nature. Games love low latency and high frequencies and neither HEDT lineup really offers that combination.
Where the other shoe drops for Threadripper is that its framerates suffer more than Ryzen 7 did, to the point where we see simple Ryzen 5 processors matching or surpassing AMD’s $1000 wunderkind in several games. We’ll be testing some theories about this shortfall in the coming weeks, but it seems like AMD’s dual die design just doesn’t benefit the serial nature of many game engines.