Wanting to know if there is a larger power supply that HP offers other than the 400w that comes with the desktop. Recommend size for the graphics card that came with the computer is minimum of 450... GTX 1600 super. I'd switch it out with one of my other larger power supplies however the connection pins appear to be proprietary to HP. (Instead of a 24 or 20 pin it's 4 pin) this is the first computer I've bought in a while so I'm not sure if it's just something that's changes over the years or not. Looking for anything over 450w.