Ah right I see - I've reviewed the manual for my motherboard and there is indeed another 5v line tied to the TPM module pinout - is that likely to work? I'll give it a go tomorrow and see, but failing that if I were to get the 5v from the PSU would that be enough to actually start the PSU in the first place? I appreciate this is probably a stupid question but isn't the reason SATA hard drives (and subsequently the 5v line) don't continue to spin, because they aren't getting power in S5?