well there is a shock lol i was reorganizing a couple of hard drives in my other pc today and i found i am already running an advanced format hard drive from hgst without even knowing lol, the disk i have is from 2015 and the one i just bought was 2013, so all i can think of is that the new one si actually faulty or there have been some changes in the 2 years between disks to make them more compatible, or there is a slight difference with the new one i bought, i bought my new one from ebay and got a full refund last night without too much bother and the guy isn't interested in getting his disk back, but i have already been looking for a new mb and cpu for later this year so ill keep the disk and check it on the new mb and see whether it is faulty or just different to the one i am already using