Multi's - I change using Sam's MSR Tool, editing 0xc0010071, 0xc0010070, 0xc0010068, 0xc0010067, 0xc0010066, 0xc0010065, 0xc0010064, 0xc0010062.

eg.

Current setting: 200x14x10x10 = 2800MHz, 4 cores, 2000MHz NB/HT

[MSR1]
index=0xc0010070
high=0x00000000
low=0x2800280C
mask_low=0xFFFFFFFF
mask_high=0xFFFFFFFF
coremask=0b1111

[MSR2]
index=0xc0010064
high=0x800001EE
low=0x2800280C
mask_low=0xFFFFFFFF
mask_high=0xFFFFFFFF
coremask=0b1111

[MSR3]
index=0xc0010065
high=0x800001B0
low=0x25009080
mask_low=0xFFFFFFFF
mask_high=0xFFFFFFFF
coremask=0b1111

[MSR4]
index=0xc0010062
high=0x00000000
low=0x00000000
mask_low=0xFFFFFFFF
mask_high=0xFFFFFFFF
coremask=0b0000

Now edited to give: 200x14x13.5x14x13.5x10x10, 2800/2700/2800/2700, 2000MHz HT/NB

[MSR1]
index=0xc0010070
high=0x00000000
low=0x2800280B
mask_low=0xFFFFFF00
mask_high=0xFFFFFFFF
coremask=0b0101

[MSR2]
index=0xc0010064
high=0x00000000
low=0x2800280B
mask_low=0xFFFFFF00
mask_high=0xFFFFFFFF
coremask=0b0101