Sounds strange. I have my computer in a room with 3 other systems running simultaneously, but no issues with interference. Here is a question though, you say the t.v. causes noise? Is the computer on the same power strip/supply as the t.v.? If so, you would want to change that. I use one power strip for each computer. Keep in mind, if you have ever seen the back label on electronic equipment, it is required by law to allow acceptance of interference. Your computer is probably just grabbing ambient noise from other cables on the strip. Obviously, anything that is CPU intensive is going to increase heat as the CPU uses more clock cycles on actual processing, which in turn, should cause the mobo to increase fan speed. Here is something I have found that works really well for me. I have the side panel of my system off, to increase the fresh air on the inside. Also, I have a desk fan blowing into the unit. My general rule is, a computer can never be kept too cool. As far as case fans, I took mine out. All they really seem to do is spread the hot air around inside the case, at the expense of more juice stolen from the mobo, and they are notoriously loud. I barely even hear the desk fan blowing! Hope some of this helps!