Watercooling with overvoltage testing - ambient livingroom temp 21c - 23c:
1489 Mhz @ 1.41v - link (green artifacts on screen starts here at 6C outside temp, but runs anyway)
...
1406 Mhz @ 1.292v - link
1401 Mhz @ 1.287v - link
1395 Mhz @ 1.287v - link
1389 Mhz @ 1.275v - link
1384 Mhz @ 1.275v - link
1377 Mhz @ 1.269v - link
1373 Mhz @ 1.263v - link
...
1333 MHz @ 1.215v - link (a little unstable)