Two straps. 100 MHz BCLK is fed into the IMC and it can regenerate the 100 MHz or produce a 1.33x signal which is 133 MHz. If you had BCLK control, you still deal with this: 100:100 is a 1x multiplier and 100:133 is 1.33x. So no, you don’t have BCLK for DRAM independent of BCLK and this would not be dependent on having BCLK control for your CPU.
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Two straps. 100 MHz BCLK is fed into the IMC and it can regenerate the 100 MHz or produce a 1.33x signal which is 133 MHz. If you had BCLK control, you still deal with this: 100:100 is a 1x multiplier and 100:133 is 1.33x. So no, you don’t have BCLK for DRAM independent of BCLK and this would not be dependent on having BCLK control for your CPU.