Yah a few things are quirky, GTX's 3's are not going to be plug and play for endusers it seems.
Here's GTX 3's stable now.
http://chew.ln2cooling.com/Ch5/gtx3%20pass.jpg
Here's the culprit sub timings ( to loose at defaults is the issue )
http://chew.ln2cooling.com/Ch5/gtx3%20pass%202.jpg