Be advised bclk is strapped to PCI. Many devices will not like high PCI, some will corrupt some will break. Including onboard devices hard drives vga.......
Best to disable all when "benching at high PCI"
SOC may help stabilize IMC with 4 dims, no clue ( don't have 4 dims ) but with 2x8g single sided Samsung B die 1.0 is fine.