Best 2080S OC settings?

Trying to find this info to use on Win10 tRex miner but not finding anything reliable.

ATM, using the OC that I had to mine on ethash: -200 core clock, +1250 (or +1500) mem clock.

From what I researched, this gpu can achieve 26MH/s, but I'm only getting 18, 19 with these settings.

Any help will be appreciated.