I have a Visiontek GoDrive 240gb SSD and my max write and read speed are 240gbps. I have a sata 3 connection to the board.
Testbed/Specs
Motherboard-Asus ROG Maximus V Gene
Graphics Card (GPU)-1x EVGA GTX 660 ti
CPU-Intel Core i7 3770k @3.5ghz
Memory (RAM)-Corsair Vengeance 16gb @1600mhz
Power Supply (PSU)-Corsair TX750m
Chassis/Case-Corsair Carabide 400r
SSD: Vivotech SSD 240gb
Mechanical Hard Drive: Seagate Barracuda 1tb
and 1tb Western Digital Caviar Black
CPU Cooler: Corsair H80i
Testbed/Specs
Motherboard-Asus ROG Maximus V Gene
Graphics Card (GPU)-1x EVGA GTX 660 ti
CPU-Intel Core i7 3770k @3.5ghz
Memory (RAM)-Corsair Vengeance 16gb @1600mhz
Power Supply (PSU)-Corsair TX750m
Chassis/Case-Corsair Carabide 400r
SSD: Vivotech SSD 240gb
Mechanical Hard Drive: Seagate Barracuda 1tb
and 1tb Western Digital Caviar Black
CPU Cooler: Corsair H80i