I don't want to do a second search through Overclock N900 thread - it is too time consuming But I remember it was related with 800MHz and I remember titan changed frequency because of that to 810MHz (or 815?). I didn't look in that part of kernel source but it seems to me that there is a high probability that kernel doesn't switch CPU to that frequency. However, the switching capability may depend from other factors too - again, I had no time to look into that part of kernel code.
===titan's ideal kernel=== VALUE VOLTAGE FREQUENCY DYNAMIC POWER 30 0.975V 0 MHz 0.000 Vē/us 30 0.975V 125 MHz 118.828 Vē/us 30 0.975V 250 MHz 237.656 Vē/us 30 0.975V 500 MHz 475.312 Vē/us 33 1.012V 550 MHz 563.279 Vē/us 38 1.075V 600 MHz 693.375 Vē/us 45 1.163V 700 MHz 946.798 Vē/us 45 1.163V 750 MHz 1014.427 Vē/us 48 1.200V 810 MHz 1166.400 Vē/us 48 1.200V 850 MHz 1224.000 Vē/us 54 1.275V 900 MHz 1463.062 Vē/us 54 1.275V 950 MHz 1544.344 Vē/us 60 1.350V 1000 MHz 1822.500 Vē/us 72 1.500V 1100 MHz 2475.000 Vē/us 72 1.500V 1150 MHz 2587.500 Vē/us