I did some overclocking together with Marcus (Kinc) this weekend and we tested the new HD5870 Matrix.
i7 980X ES
3x2GB Corsair CMGTX2
ASUS HD5870 Matrix 2GB
F1EE and Tek9 4.0
Pic of the system
Highest core speed through Vantage Performance
Highest total score (1500/1300) 30542
Around 1525-1550/1325-1350 should be possible with more time on this one.