TBH a lot of the 3DMARK scores can differ a lot depending on your CPU. Shame we do not know what CPU sapphire used. We will need to wait for real benches and see how it overclocks.
1200MHz is a pretty great OC for a 290X, not many get that high.
so in and around the 780ti area like i thought it would be then? (although the 78ti would need a bit of an oc to get that 3d mark score.)
may be worth the upgrade from a 780 for me then. But as i like to water cool i may try and get a 780 ti or titan instead 2nd hand as i can use my current water block.