If you Google images of the rear chassis, you'll find the rear connections aren't the same.  The cutouts on a 3010 case won't match a 7010 MB. 2nd, the MB in a 7010 is larger than a 3010 MB.  Screw holes likely won't line up. Just showing the rear panels, 3010 is 1st image and 7010 is 2nd. [IMAGE] [IMAGE]  
Motherboard Upgrade   I have a Dell Optiplex 3010 MT. I am wondering if I can put a Optiplex 7010 MT motherboard. I think there is a fan adapter needed and the front 3.0 ports won't work. But does everything else work. Thanks.
Optiplex 7010 MT motherboard in Optiplex 3010 MT