Hi there,

I have Win7 64 bit and changed my GTX 570 against a GTX 980Ti Superclocked yesterday (EVGA). Of course I installed the according driver.
I never had a problem with my Blender 2.49b oldie. I love modding Oblivion, Fallout etc. .. hence I'm restricted to that old blender version.

But now whenever I use the selection tool (square or circle) the selection doesn't get refreshed somehow and stays on the screen .. I've made a screenie:

And while boneweight-copying the property panel is flickering.

Someone told me following:

I've seen similar when I bought a 1070 where everything flickers between new and old frames. It's nothing to do with Python, and it's certainly not DirectX, C++ or NET as Blender uses none of those libraries; it's likely a discrepancy between how newer NVIDIA cards handle OpenGL and how Blender 2.49 handles OpenGL, particularly the framebuffer. There's options in the NVIDIA Control Panel for specific programs, you may need to add Blender to that list, and from there set its specific settings to use one of the alternate frame renders.

So now my question here is .. can someone tell me what nvidia program settings for blender could help in that matter.

Thanks in advance and
best regards

Do a clean install of windows 10, 64bit ofc, Use windows uppdate, Install newest nvidia driver from the website Geforce.com   should be no problem at all