Strange issue with Mac Pro 3,1

Hey everyone,

I just recently moved into a commercial space for my design studio, and I took my 2008 Mac Pro 3,1 (8-core) to the studio. I'm having a few interesting problems with the USB ports on my Mac Pro when it's at the studio. It seems like I can only have one device plugged into the computer. If I have my USB Apple keyboard plugged in, none of the remaining ports will work (my iPhone won't even detect a charge). If I plug my Wacom drawing tablet into the keyboard hub, the keyboard stops working, but the tablet works. If I unplug the keyboard and plug a different device in, that device will work, but another additional devices won't. And the cycle continues.

Last night I took the computer back to my apartment, and all the USB drives work properly, but I ran into the same issue when I took my computer back to the studio this morning.

I've tried a SMC reset, PRAM reset, and reinstalled the OS.

The outlets are putting out 120-123 volts.

Does anyone have any other ideas?

Thanks for you help!

 

Thanks for the suggestion! That makes sense to me. I'm not extremely knowledgeable about electrical stuff. Is there a specific conditioner or type of conditioner that I should buy? From my research, they look like a beefed up power strip, but that's really all I know about them.