We have a Windows 7 Pro PC with a VisionTek AMD Radeon R7 240 2GB. We got this card because it supports 4K specs. This card is attached to a 4K TV (Seiki 39" Class 4K LED UHD TV - 3840 x 2160, 120Hz, 3x HDMI - SE39UY04). I works wonderfully except when the monitor is turned off or goes to sleep mode. Then when the monitor is turned on or awakened, all the windows that where open are resized (smaller) and stacked in the upper left hand corner of the screen. Apparently, when the TV/Monitor is turned off the resolution is reset to a smaller resolution. The question is, is this caused by the OS (win7), or the Radion R7 240, or the TV(Seiki)? And maybe someone has a resolution. Thanks in advance.