Quote (NatureNames @ Jul 23 2019 08:23am)
If you do a lot of video editing the 3900X is going to be significantly faster for rendering, compiling, and other workload related tasks because software like that typically makes good use of the higher core/thread count of the 3900X.
For gaming you will get better framerates out of the 9900K (5-25 more fps over the 3900X at stock speeds. Depends on the game). The 9900K can also be substantially overclocked for even bigger gains (though you will need a really good CPU cooler and quality VRM on the mobo to do this). The 3900X pretty much can't be overclocked much before it becoming unstable or actually performing worse than stock.
For most games it's unrealistic to think you will get 120fps at 2160p (4k). The isn't a GPU in the world that can pull that off unless it's a game light on graphics with an efficient engine. Even doing 60fps @ 2160p is really challenging in graphically heavy games. If you want a good frame rate like 100+ you will need to use 1440p or sometimes 1080p for certain games (also depends what settings you use).
It's also worth mentioning that if you do choose to run games at 2160p the GPU will typically max out at 100% in graphically heavy games, creating a bottleneck that doesn't allow the 9900k to really show it's full potential, making it perform more closely to the 3900X. Where you will really see the 9900k shine in gaming is at 1080p or 1400p because the GPU wont be causing a such bottleneck.
If video editing is your priority the 3900X will complete tasks about 25% faster than the 9900K on average. If gaming is your priority I
Thank you for the explanation! I don't really mind gaming at lower graphics. But when I work, the extra speed is gonna be sweet!