I have an issue. I just did an sli setup. I have 2 galax gtx 1080 hof edition cards. I was playing overwatch for I'd say almost 2 hours. Match ended and I was just sitting in the menu screen and computer froze up. I had to hard restart it multiple times because I wasn't getting any feed on the monitor. Pc itself was running fine everything powered up fine but no picture on monitor. Any ideas?