The box is reassuringly heavy, but rather large, thankfully it's all just packaging and presentation, the power supply is the regular ATX size. It comes in a mock felt bag and all the modular connectors come in a zip up bag. Feels a bit odd, it's not like you'd keep this thing in a display cabinet. The main power/cpu and graphics card cables are permanently wired in to the unit, so it's not entirely modular, but it would be an usual system you'd be building if you didn't need all those cables. The wires were the perfect length for me and sit inside my case, looping up behind the motherboard out of sight. That's something you don't appreciate until you don't have cables that are long enough, or are far too long like I've experienced with previous PSU's. I'm only using two modular cables, one sata one, which has 3 power outputs on it, and one old style four pin power connector for my front panel. The PSU runs near silent. My power requirements don't get anywhere near 850w at the moment but I'm confident that as I replace components with higher powered ones, this PSU will be able to cope.