Solved Windows are wrong size after switching GPUs

tdw

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Hi y'all :)

Since I've changed my GPU from an AMD R9 290 to an Nvidia GTX1080, my W7 is showing an odd behaviour regarding windows that aren't snapped to a side of the monitor or maximized, ie "floating" like my file explorer. When I shut off my monitor or when it disables the video signal after a few minutes (screen saver) and I then reactivate it, the floating windows are resized to approx. 640x480px and are located in the upper left corner. When the monitor is deactivated, I hear the typical "something disconnected" sound as well as the other sound when it reconnects. I found the following keys to edit in the registry, but my files are named differently (although the subfolders are identical) and it didn't change anything. I know it started occuring after I swapped the GPU, but I uninstalled the drivers with the Disk Driver Uninstaller tool.

How can I stop windows re-positioning after waking from sleep? - Super User

Also, my desktop icons are all messed up after each time the monitor is shut off or in sleep mode. I tried the Nvidia drivers 382.05 and 382.33, changing didn't do anything.

Does anyone have an idea what's going on? System: W7 Ultimate x64, i7 6800k, 32GB DDR4 RAM, GTX 1080, MSI X99a Raider, Asus MG278Q connected via display plort. I'd appreciate any help, I don't really know what to do and I'd like to avoid reinstalling or upgrading to W10 :/
 

My Computer

Computer type
PC/Desktop
OS
W7 Ultimate x64

My Computer

Computer type
PC/Desktop
Computer Manufacturer/Model Number
Custom assembled by me :}
OS
Win-7-Pro64bit 7-H-Prem-64bit
CPU
i7-5930K 2nd i9-9940x both water blocked VRM's too
Motherboard
ASUS SABERTOOTH X99 2nd ASUS x299 Apex
Memory
Trident-z 3200C14 2nd Trident-z 3600C16
Graphics Card(s)
EVGA 1080ti ftw3 2nd Titan Xp both water blocked
Sound Card
Built-in Realtek
Monitor(s) Displays
1-AOC G2460PG 24"G-Sync 144Hz/ 2nd 1-ASUS VG248QE 24" 144Hz
Screen Resolution
1920 x 1080 144Hz
Hard Drives
2-Samsung M.2 Evo & Evo Plus
2-Samsung 850 EVO 500GB SSD's/ 3-2.5 W.D. Black 1tb-&3-1tb/3-3.5 WD Black 1tb hdd's
PSU
EVGA SuperNOVA 1000-P2 2nd 1200-P2
Case
2-Corsair Obsidian Series 450D Black ATX Mid Tower
Cooling
Custom water loops
Keyboard
Logitech G710+/ 2nd Logitech G910
Mouse
2-RedDragon M901 Perdition 16400 dpi Gaming mouse = wired
Internet Speed
Comcast Ping 19ms 89.31mbps download speed 6.12mbps upload
Antivirus
Malwarebytes Pro/ Superantispyware Pro
Browser
FireFox & Pale moon
Other Info
2nd ASUS X299 Apex/Intel i9-9940x with Custom water loop/7H-Prem-x64/Corsair 450D case/Ram Trident-z 3600C16 4x8gb / Samsung970Evo plus 500gb SSD/Dual ssd EZ swap evo/PSU EVGA SuperNova 1200w-P2 80+Platinum/GPU Titan Xp /8-ML-140 on push-pull on 2-280GTX rads
Hi,

I'll try that and get back to you, but it will probably take me a few days.
 

My Computer

Computer type
PC/Desktop
OS
W7 Ultimate x64
Hi again after a long time ;)

I've found not necessarily THE solution, but a solution. After Windows killed itself while recovering from sleepmode, I had to reinstall everything and hoped the issue would be gone. It persisted though and after further research, I've found the tip to use a HDMI cable instead of DP. Voilà - resolved!
 

My Computer

Computer type
PC/Desktop
OS
W7 Ultimate x64
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