The system normally has the turbo set to 45 and is stable up to 50. I tried stock speeds as well as lower than stock. I suspect it is not detecting the processor properly just like the Core2. Core2 has never had HT yet the client assumes HT if more than 4 threads. The 2600K supports AVX but it may be trying to use more advanced instructions like AVX2. Windows blue screens within 30 seconds no matter what speed the system is set to run. I could do further testing by forcing instructions via client options but the system is currently unplugged. Issues like this is why I give the client reliability such a low score. Dealing with issues like this on one system is ok but try running this on 10 or more systems. I don't have that much spare time. I can run something more stable like dnetc and have time to relax, smoke a cigar, and sip some nice Irish whiskey.