RE: Dell 390 Tower with 3 Video Cards having issue with getting vid cards to work in pcie x 1 ports... need help
3 video cards is not EVER supported. If you need more monitors you need to stick to legacy cards that have more than one monitor.
ANY new Radeon Software Crimson Edition driver set, AMD has published a new page on their driver site announcing that video cards based on the company’s pre-Graphics Core Next architectures have been moved to legacy status. This means that GPUs based on the company’s VLIW5 and VLIW4 architectures – the Evergreen and Northern Islands families – have been retired and will no longer be supported. 15.7.1 is the last WHQL Driver .