If you buy a modular PSU you should get spare cables. For a regular PSU the spare SATA cables would be inside, connected to the PSU .Is there usually an unused SATA cable inside when you buy a desktop from here? I want to buy an SSD separately and I'm wondering if I need to buy a cable.
I think Keynes is thinking of spare power cables,usually there won't be a spare sata cable,you may have one supplied with the SSD you buy separately though.If you buy a modular PSU you should get spare cables. For a regular PSU the spare SATA cables would be inside, connected to the PSU .