AnsweredAssumed Answered

Trouble with radeon r7 240 been known as amd iommu device

Question asked by gabrielpgsp on Jan 12, 2017
Latest reply on Jan 13, 2017 by redfury

Hello everyone, sorry for my english, but here's my problem: my radeon r7 240 doesn't work as a VGA anymore, now windows is considering it as iommu device, I re-installed the drivers, reset, everything that I remembered to do,but it still didn't work, what should I do to solve this problem?

  • AMD Graphics Card
    • AMD R7 240 1GB DDR5(with the problem)
  • Desktop
  • Operating System
    • Windows 7 Ultimate (x64) Service Pack 1 (build 7601)
  • Driver version installed
    • Radeon Software Crimson Edition 16.2.1
  • Display Device
    • LG E1941 1366*768 to HDMI adapter
  • Motherboard
    • Gigabyte Technology Co., Ltd. F2A88XM-D3H
    • 3,90 gigahertz AMD A8-6600K APU with Radeon HD Graphics 8570D
  • Power Supply Unit  Make, Model & Wattage
    • WiseCase 600W
  • RAM
    • 4GB


  • The Graphic Card was working but suddenly it stopped been recognized by the PC as a Graphic Card, instead, it's been detected as a System device called AMD IOMMU Device.
  • There's a picture anexed showing the problem, the picture is in brazilian portuguese, it shows my windows device manager(or a name similar to this, I always used windows in portuguese as I myself am brazilian - again, sorry for my bad english)

What should I do?