AMD NBCLK and DRAM ratios/dividers

[filmbot]

I don't know why you want to know ratios for CPU-NB as you don't change a ratio number in bios but you change the frequency. At least on Asus boards, i don't know what board you've got?

For my Crosshair V Formula-Z i can set CPU-NB as low as 800MHz to as high as 6200MHz.(this is with default 200MHz Ht ref freq.) In other words from multiplier 4 to multi 31.

Hope this helps.

Sorry, I did mean multi for NB but thank you for posting the multi ranges.

NB multi is available only in integer values. Range depends on board/CPU.

DRAM is 800, 1066, 1333, 1600, 1866 (2133, 2400) which relates to Multis/Dividers 2x, 2.66x, 3.33x, 4x, 4.66x (5.33x, 6x)

Exactly the info I was looking for, much appreciated

K15h 10-1Fh (TN/RL)

200MHz (DDR-400) - 1:2 - Pll 16/4 - Min NCLK 300MHz (900MHz)
266MHz (DDR-533) - 3:8 - Pll 16/3 - Min NCLK 400MHz (900MHz)
400MHz (DDR-800) - 1:4 - Pll 16/2 - Min NCLK 500MHz (900MHz)
533MHz (DDR-1066) - 3:16 - Pll 32/3 - Min NCLK 700MHz (900MHz)
667MHz (DDR-1333) - 3:20 - Pll 40/3 - Min NCLK 900MHz
800MHz (DDR-1600) - 1:8 - Pll 32/2 - Min NCLK 1000MHz
933MHz (DDR-1866) - 3:28 - Pll 56/3 - Min NCLK 1200MHz
1050MHz (DDR-2100) - 2:21 - Pll 42/2 - Min NCLK 1400MHz
1066MHz (DDR-2133) - 3:32 - Pll 64/3 - Min NCLK 1400MHz
1200MHz (DDR-2400) - 1:12 - Pll 48/2 - Min NCLK 1500MHz)

-----------------

K15h 0-Fh (ZMB/VSHR)

200MHz (DDR-400) - 1:1 - Min NCLK 400MHz (800MHz)
266MHz (DDR-533) - 3:4 - Min NCLK 600MHz (800MHz)
400MHz (DDR-800) - 1:2 - Min NCLK 800MHz
533MHz (DDR-1066) - 3:8 - Min NCLK 1200MHz
667MHz (DDR-1333) - 3:10 - Min NCLK 1400MHz
800MHz (DDR-1600) - 1:4 - Min NCLK 1600MHz
933MHz (DDR-1866) - 3:14 - Min NCLK 2000MHz
1050MHz (DDR-2100) - 4:21 - Min NCLK 2200MHz
1066MHz (DDR-2133) - 3:16 - Min NCLK 2200MHz
1200MHz (DDR-2400) - 1:6 - Min NCLK 2400MHz

As always Stilt,

I assume "ZMB," "VSHR" and "TN" stand for Zambezi, Vishera and Trinity but what does "RL" stand for?