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GA-Z68X-UD3H-B3 not reading cpu fq properly, plus other question

i5-2500k, no overclocking
getting different cpu readings:

touch bios: 1.6 ghz (jumps ALOT (1ghz, 2.31ghz, 3.41ghz, 3.01ghz etc), even when idling computer), 24c
cpu-z: 1.6ghz (stable readings)
coretemp: constantly at 3.3ghz, 33c

not sure if intel speed step is working or not, i dont see any options for it in the bios

another question:
is it normal in the boot, if you have ahci mode on, you get a flash in dos screen loading the harddrives, it appears for like 3 seconds

also, does turbo boost automatically kick in for the mobo?