Beside the x16 slot for graphics, the system only has another x4 slot available. To expand display devices, either using the integrated graphics  or replace the discrete graphics card for a different one with more video output ports, or a combination of both. Here is the specification for video graphics: [IMAGE][IMAGE]
Precision 3640 Tower, Windows 10 Pro, 2xSSD AMD Radeon, 4Gb, 3xDP, 1xHDMI Purchase date: April 2021 The client is using software that displays via 3 projectors.   The HDMI is used for a desktop monitor. We cannot find the reason for the crashes.  The card gets hot according to monitoring software but not in the danger zone. The software vendor they do not see this with other clients.  And the hardware looks to be very functional. Questions: 1. can a 2nd video card be added to this tower case? 2. the client would like to add 2 more display devices (either projectors or TVs) to the system   Suggestions?    Thanks! 
Precision 3640 Tower - Video Card