Unplayable Lag when Using Dynamic Lighting - What can I do?

So I can tell this is a common issue. But a lot of the time I see people say to enable hardware acceleration, or upgrade your computer. I have a pretty top of the line PC right now, Ryzen 3900X, 3733mhz RAM and a RTX 2070 super. Yet I still have almost unplayable lag when the DM tries to use Dynamic lighting and I think it's some sort of fog of war. Is there something I should be doing on my end, is this just a known issue with Chrome 85?

There's very little you can do, really. Your hardware is extremely unlikely to be an issue if you have a gaming rig of any kind - ancient laptops with gas-powered CPUs can be an issue, but new hardware shouldn't have any major issues. Provided your net connection is fine (no firewall or DNS issues)... make sure you don't have a large number of spells on your character? Not much else to do from a player perspective. The DM can try a bunch of things to speed it up - removing unneeded DL lines, making sure there's no DL circles, make sure NPC tokens don't have 'have sight' enabled etc.

Two common things to check: If Updated Dynamic Lighting is being used, go back to Legacy Dynamic Lighting. If Global Illumination and Advanced Fog of War are on, turn off AFoW or switch off Global Illumination and use light sources.

Those are both very good suggestions. Number 1 will eventually be resolved (knocks virtual wood), but number 2 is a known game-killer. I can run simple legacy DL games on a Chromebook, so as Oosh says, it is very unlikely to be a hardware issue.