Yeah, I have an sata optical drive. Nothing else connected aside from that.
However,
I seem to have eradicated the issue, playing around with the Bios. I just want to go through with you on what I did. Firstly, I set the CPU fan control to disabled, which corsair recommend. The temperate was around 47c before I did this, so can't imagine this rectified it.
I then changed the following -
eSata ctrl mode - AHCI
Gsata ctrl mode - AHCI
I was already running Raid 0 with XHD enabled When I changed all these settings, it automatically installed a load of drivers and now I cannot replicate the original issue.