If you indeed have a GTX 860M GPU, I would go and upgrade that. I know there are some complications using external GPU on laptops, and that would be more of a Hardware forum questions. But what I would do, to make sure to know where your bottleneck is (and what I did to fix mine) Once you have your project opened and your timeline ready to playback: - Right click on an empty part of the Windows task bar and open the task Manager - Go in the performance Tab. You should see your CPU usage, Ram and HDD. - Play your timeline and look at the task Manager If you see a disk usage of 90% or more, you know this is the way to go. If CPU usage flies high, you'll know that's what you'll have to upgrade. I know there are also GPU usage monitoring apps, but I never used them (yet). Also, Lumetri color correction needs a lot of vram on your GPU (it's very gpu intensive) and that's also what might causes render issues or crashes. Hope this helps. Seb
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