Hey, what's up guys? Quick question for you all:

I recently picked up an older Gateway PC (2000-ish) with Windows XP at a yard sale for 25 bucks and I figured it'd be awesome to use as an older end DOS/Windows 95/98 machine. I was able to consolidate my desk to hold both my modern monitor and the older monitor, but I was a little concerned about the two towers:

They fit perfectly side by side, with very little room on either side. There's a good 3-4 inches behind each of them, so ventilation in the back is fine. My question is, how close is too close? I've seen some sites say they can be directly against each other with no issues, while others say the exact opposite.