problem with overclocking

[Cancar96]

gdx v022,stock kernel

when i overclock(691mhz) my performance drops and phone gets laggy.to prove it i benchmarked it on antutu and it is true.i get half of performance of 600mhz.
someone experienced this issue?

Sent from my X8 using xda app-developers app

 

[cascabel]

Spyder mentioned that the module actually underclocks on that frequency and below. Try using a higher frequency.

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[ScatteredHell]

yep, i tried 729MHz it worked for me