SLI on: G-Sync on, Fps ~90, 1949 Mhz core, 76 and 65 °C, both ~60% load, both ~45% power, both in SLI Sync limit (for whatever reason in that Fps area on 1080p)
SLI off: G-Sync on, Fps ~70-75, 1936 MHz core, 80 °C, -85-90% load, ~65% power, voltage limit (which means "no other limit", afaik)...