Just replaced a tired Samsung 840 Pro SSD, with a new 860 Pro SSD. The IOPS were low on the 840, I figured mostly because the drive is 5+ years old, and has 160TB written. But after installing the 860 Pro, the IOPS are indeed better, but not to their full potential I suspect. I have yet another 840 Pro in my wifes Windows 7 system, that consistently maxes out IOPS at 90K read and about 80K write. So I don't know if this is a Windows 10 issue or not. I have verified both SSD's are plugged into the Intel controlled SATA 6Gbps ports. Both setup for optimum performance, with 10% over-provisioning. Seems ASUS has forgotten us Z77 users, they released some Beta Windows 10 drivers, but that's all. I kind of suspect the Intel rapid storage technology driver, as I had an Intel rep on the phone suggest a different driver version (18.104.22.1682) than what ASUS has listed on the mobo's download page, and throughput did go up a little. Sorry for the rambling. Appreciate any insight a fellow Maximus V Gene user running Windows 10 might have, thank you.
Windows 10 Pro Ver 1803 Build 17134.81 Maximus V Gene mobo I7 3770K @4.7Ghz (on water) 16Gb Corsair Dominator Platinum 2133mhz Ram EVGA GTX 980ti graphics card Samsung 860 Pro 256Gb SSD Samsung 840 Pro 256GB SSD 2X WD Black 4TB storage drives Corsair AX860 PSU