I had strange issues with my windows install on an older 950 pro. They all went away when i replaced it with a new 960 pro. The question is: how do I test the older disk for errors, bad blocks, etc.? I'd like to find out if i can re-use this disk or if i should RMA it. I've searched all over the internet and can't find a definitive answer on this. On a spinning disk i'd check SMART info before and after running badblocks, but i've read that SSD controllers dont work the same way. thanks!