The Thermaltake is a ancient design and just because it hasn't been used doesn't mean that it's like new. Things like capacitors still degrade over time plus I there will be no warranty after all that time. The Corsair is the better of the two and should have the bulk of it's 5 year warranty remaining. To be honest, neither of them are great psu's. The Thermaltake is ancient and the Corsair is overpriced for what it is and is all about the RGB which in my opinion has no place on a psu. Normally the psu fan will be pointed downwards so it sucks cool air through the bottom of the case and many cases have compartments or shrouds that hide the psu so you won't see the RGB anyway. They should have ditched the RGB and focused more on quality. That being said, the Corsair is the one to get out of the two.