i7-4790K CPU @ 4.00GHz, 16GB RAM, x64, R9 270x 4GB
My first guess was out of date drivers, but that wasn't the case. Maybe the video card itself? That I have a SSD? It's a gaming desktop but getting a bit dated. I haven't had the error happen again though. I'm checking the performance now, but it doesn't seem at all taxed.