20210210 20:50:09 Mining at eu1.ethermine.org:4444, diff: 4.00 G
20210210 20:50:09 ethash epoch: 394, block: 11830491, diff: 4.00 G
20210210 20:50:09 GPU #0: ASUS RTX 2080 Ti - 2089.34 kH/s, [T:30C, P: 44W, F:30%, E:49kH/W], 0/0 R:0%
20210210 20:50:09 GPU #1: ASUS RTX 2080 Ti - 50.43 MH/s, [T:42C, P:216W, F:36%, E:235kH/W], 2/2 R:0%
20210210 20:50:09 Hashrate: 52.52 MH/s, Shares/min: 2 (Avr. 1.157), Avr.P: 258W, Avr.E: 204kH/W
20210210 20:50:09 Uptime: 2 mins 43 secs | Algo: ethash | T-Rex v0.19.10
Answering to myself: flashing back to original BIOS from an OC one fixed this for me, now ~60MH/s each.