The T610 only has PCIe 4x slots (not open-ended from what I've seen, so you cannot put in a 'larger' PCIe card either). This means that physically you can put in a 1x or 4x PCIe card. However, Dell's server bios isn't really built around the idea that you'd add a videocard (that's more for a desktop computer). You may be able to get it to work, but don't count on support or assistance from Dell. A few notes:  - there is most likely no power cable for a videocard in the server, so your videocard would need to be a model that doesn't require extra power. - if you have a DRAC, depending on the model DRAC, you'll loose (part of) it's functionality - you may or may not be able to disable the onboard videocard. This could cause a conflict or prevent the add-on card from working. If you're looking for a Dell tower system with dual processor support, I'd suggest to get a Precision Workstation T5500 or T7500. These are built to hold videocards and can handle dual processor and lots of memory. They are also available with a PERC6i (or at least the T7500 is) for full raid support. The only thing these workstations don't have is support for more than 4 harddrives (w/o sacrificing an optical drive bay) and hotswap capabilities.
Please Can you help to know if I Can Install an external VGA card to Dell Power Edge T 610 ?
Can I install VGA card to Dell PowerEdge T610?