Usually modern computers would thermal throttle instead of throwing up a black screen if it got too hot but the PSU is 80+ Bronze certified and 500 watts does seem enough for that system. It could also be the GPU freaking out. @howisthattakencan you hear any sounds when the screen goes black or is it just completely unresponsive. Does the PC turn off by itself?
Gay and I just walked into my moms room, told her I was gay, and went for a shower before she could respond. When I had dried off she came and hugged me and said that she had a feeling lol