I am surprised that installing debian on that barely alive surface pro 3 was easier than setting up windows on any machine I've touched recently, pretty cool.
Not a day goes by without me thinking about SMAA. You were a real trooper, you eliminated whatever jaggies you could but didn't like to annihilate whatever detail existed in the image. I'll miss you buddy.......
*Ignore OptiX, the OP is about troubleshooting OptiX performance