Bit of an update, as with the newer BIOS versions I have been able to use the 16GB Corsair Vengeance LP Black DDR3-1866 (2x8GB) at 1866MHz.
Intel i7-4770K ASUS Sabertooth Z87 BIOS v1707
16GB Corsair Vengeance LP Black DDR3-1866 (2x8GB)
2x Corsair Force 3 120GB RAID 0
2x Western Digital Black 1TB RAID 0
2x EVGA GeForce GTX 770 Superclock ACX + Back-plates & EVGA Pro Bridge
ASUS Xonar DX PCI-E
Corsair H100i CPU Cooler
Corsair AX860i
Coolermaster CM-690 II USB 3.0
EIST – Off Turbo - On
CPU Ratio – 41 (41x100 - 4.0GHz)
DDR Frequency - 1866MHz
Core Voltage - Auto (giving me 1.115v)
Min Cache Speed - 39
Max Cache Speed - 41 (locking it at 4.0GHz)
Main PC : | Intel i9-9900K @ Default | ASUS Maximus XI Hero | Corsair Vengeance RGB PRO 32GB 3200MHz | ASUS TUF RTX 3060 OC Edition 12GB | Samsung 980 PRO 1TB NVMe | Samsung 970 EVO Plus 2TB NVMe | Sound Blaster AE-7 | Corsair iCUE H150i ELITE LCD | Corsair iCUE 5000X RGB | Corsair HX850 Platinum | ASUS ProArt PA279CV 27" 4K | Windows 11 Professional x64
| Full PC List |