I bought a seagate 3TB drive a few days ago, and ever since I installed it I have had terrible lag spikes in games, sometimes down to 6 fps, when before I installed It I was having 150-200 fps. I have 3 drives, a Samsung SSD as the primary boot drive, another older 500gb hard drive, and now the seagate drive. I took the 2 cables from my dvd drive, and plugged them into the hard drive because I didn't have the cables (just ordered more) the only thing I did was install it and format it, and it has been slow ever since.