How do I add RAM to my Dell T3500?
How do I get into BIOS on Dell Precision T3500?
Press the “F2” key as soon as the T3500 keyboard lights flash. The BIOS menu loads. Press the arrow keys to navigate throughout the BIOS menu.
Can Dell Precision T3500 be upgraded to Windows 10?
No official support from Intel or Microsoft for the X58 Chipset on Windows 10. My advice would be to image your system to another hard drive and run the upgrade on that, to see how things turn out.