I am having performance issues when enabling SR. Both on stock clocks and when overclocked to 900MHz, video playback is jumpy.

At first I thought it is because I've mistakenly saved profile with SR-enabled voltages and then made it a default one, so I tried using default values and just enabling SR in config file, but same poor performance again. Tried both base frequency and overclocked to 900MHz.

However, my device runs well on ulv profile. Even non-overclocked it plays most videos fine, without any lag. Right now it is overclocked to 900MHz just to be sure.

What could be the problem?

Do I loose much battery life or maybe even something else running an overclocked N900 without SmartReflex?