DOH... and you don't get the error at slower speeds then?
Nice clock for an SLK, damn... I've got a Tornado and SLK-900a on my 1700+, definitely a sweet cooling combo. Running at 2.4 with the fan about 7V too.
I was going to run a duct in my window like last year, but never got around to it. Those -20c days usually give me some badass temps, too.