You could go for a B 150 board , the difference being 2 more RAM slots for future upgrades and some USB 2 ports are now USB 3 . As for the power supplies , let me put it this way . There are two components in a pc that account for 90 % of the power used , the CPU and the CPU . This is illustrated by the fact that these are the only two components that need giant cooling solutions hahaha . If your cpu draws less than 70 Watts at peak load , and your GPU maxes out at 130 Watts , that you ' d add up to 200 ish watts at absolute torture max load . So yeah , 400 Watts is more than enough . It ' s just that it used to be that lower watt PSU ' s were almost always bad quality , but that is no longer the case . The EVGA 500 B power supply i mentioned is of good quality for example . Editif you are planning on overclocking a kCPU then you need a motherboard with the Z 170 chipset . These are quite a bit more expensive than the H 110 and B 150 boards $ 100 ish more so that ' s something to consider when deciding between a K and a nonK chip . Also im pretty sure your old mouse just had a bad connection somewhere . If your PSU was causing that you ' d know , trust me .