I have Asus Rampage III gene motherboard with Intel Core i7 processor. It has support for sata 6GB/s technology. It has 2 sata III 6GB/s connector. I brought a new Seagate Barracuda 1 TB 7200RPM SATA 6Gb/s with 32MB Cache Internal hard Drive. I attach new hard drive with SATA 6GB/s connector but when boot the marvel controller it shows drive is connected to 3GB/s speed. I check in bios 6GB/s controller is also enabled and connected at AHCI mode. I update bios with latest version but cannot solve the problem. I disconnect the hard drive and connect it properly with SATA 6GB/s cable which is come along with motherboard but still same issue. I don’t understand is it problem with hard drive or marvel controller. Anyone knows how to solve this problem?
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