Hey guys, I bought a TS140 in 2015 and it had been working fine for me for a while. about a year ago, I noticed I have been using like 90% constantly on the CPU just to keep it running (no recording or anything). I'm having a hard time trying to figure out what's going on... I would gladly take some advice. I get alot of rainbow artifacts when recording now too because I think the CPU is always so pegged, it just can't keep up with recording. I have 4 1080 hikvision cameras (3 hardwired, 1 wifi). I have 2 more cameras that are currently disabled (1 hardwired 1080 hikvision and 1 720 wifi). They are all at 15fps. Not sure where to start, so tell me what should be checked, or unchecked. I was running it on a 4K 55" TV. I changed it to 1080, but it didn't change anything. I was also thinking about ordering a Nvidia 750 gfx card, hoping it would help. Do you think it will?