Two ports at once have been used for Samsung’s 5120x1440 240hz monitors. Each port refreshes half of the screen and there are two scanlines going from left to right. Using the calc here you might be able to use two DP2.1 UHBR80 cables with DSC and nonstandard timings to run 4k 1000hz 10bit.
Try vanilla bean paste if you haven’t - its actually good unlike the extract. Extract tastes bad because of concentration of cheap vodka, and paste has more vanilla so there’s less vodka per volume.