keep channel interleaving turned off.
And the memory must be set to run in Ganged mode
add ECC to non-ECC memory
select ECC configuration
ECC to allow custom profiles or user set
DRAM SCRUB REDIRECT should be disabled and 4-bit ECC mode enabled, otherwise known as killer ECC mode.
These settings have ensured the memory to become stable.
DRAM BG scrub set to 1.31MS
Data cache BG scrub set to 5.12US
L2 cache BG scrub set to 5.12US
L3 cache BG scrub set to 5.12US
You can play around with it to see what get you stable with ram at 2000mhz