KnC:   core 3-0 was disabled due to 3 HW errors in a row
         core 3-82
         core 3-162
         core 3-52
         core 3-87
         core 3-50
         core 3-179
         core 3-177
         core 3-45
         core 3-27
         core 3-188
         core 3-35
         core 3-77
         core 3-40
         core 3-58

This is with cgminer-3.8.2 tuned.  It makes no difference between stable and tuned.
        
My die 3 is the problem one.

I get an occasional errors from die 4 and 0 with one bad thread

KnC:  core 4-0 was disabled due to 3 HW errors in a row
KnC:  core 4-130 was disabled due to 3 HW errors in a row
KnC:  core 4-118 was disabled due to 3 HW errors in a row
KnC:  core 4-64 was disabled due to 3 HW errors in a row
KnC:  core 4-113 was disabled due to 3 HW errors in a row
KnC:  core 0-33 was disabled due to 3 HW errors in a row

But my die 3 is the troublemaker.

(5s) 502.8G (avg): 498.6Gh/s | A:4567616  R: 38764  HW:  221371  WU: 6965.5/m

[/quote]

felix is it 15 bad cores or 5?

You know that with the tuning cgminer it turns cores on and off to try and find a stable medium.

What are your HW error %'s?

I've given up on the firmwares that pump the voltage up (>0.97) and tune the cores, I'm sticking with 0.96 and the non tuning 3.8.2 cgminer and my HW errors are down from 4.5% to 1.3% and dropping.
[/quote]