I'd question whether all of that is true or not. A given project cannot be changed without disrupting the validity of the science. If drivers and the FahCore version did not change, then either the percentage of WUs failing was higher than you think and you were lucky to not see the failures or maybe you're thinking of some other project that was assigned to use Core_18.heikosch wrote:When the new AS was activated (just over night for me!) my GTX 750Ti began to throw errors with P1300x. Core 0x17 Version didn´t change and I didn´t change nVidia driver nor installed other Software or updates.
Maybe they changed not only the AS but independently the content of the P1300x WUs. Shortly after that they stopped to assign P1300x to Maxwell GPUs.
As has already been said, the Assignment Server is responsible for assigning your client to a specific Work Server that can supply your work for your system. During the first exposure of the Assignment Server to the world, some projects and/or cores were assigned to systems that could not process them. Those bugs seem to have eradicated so now Core_17 and Core_18 and Core_b0 are only assigned to systems that can process them, but either your system could process a WU before and (if it's still assigned) it still can process it or your system had problems with WUs from specific projects before and now they're not being assigned.