Currently own an Aorus X5 laptop with dual 965m's in SLI and i've been able to get a stable overclock of +135Mhz to core and +800Mhz to memory for almost 6 months now... i know i'm pushing it but i'm yet to have any problems. Performance seems to be on par with a desktop GTX 780 with these overclocks. As you can see from the attached photo, i'm able to keep a solid 60fps on War Thunder with completely maxed out settings (excluding Anti-Aliasing) at 2880x1620 (3k) resolution:D
Shame the cooling on the processor (i7-5700HQ) is insufficient to allow any overclocking, i normally have to use Intel XTU and reduce CPU clock speeds from 3.5ghz to 3ghz maximum!!