But now, I have discovered something.
When I enable "ACC" in the BIOS, no matter which cores I disable, it will give me those issues, even if I disable the locked cores.
Is it a ACC problem?
Also, when I enable "ACC" and disable all other 5 cores, with only the first core enabled, I get this on OpenCL Rendering :
It makes this also if I set the affinity to "Core 0". Any other core does not create that problem.
What I am thinking that it may not be the "CPU" itself that is malfunctioning, but myabe something else...
So in brief :
ACC Enabled and All 6 cores enabled = Core 0 gives issues
ACC Enabled and Only 4 cores enabled (good cores) = Core 0 gives issues
ACC Enabled and Only 1 cores enabled = Core 0 gives issues
ACC Disabled and All 4 cores enabled = No issues.