I really don't understand what this post saying.
I have HD6870 & mining mostly with -v-w128 -f 1-15(anything depends other pgms)
You saying the red circle in the picture.
I always see other programs respond slow when i am mining at -f1,
Watching videos avi, mkv,youtube....gets slower, so i change -f1 to f15 or more.
After i change that, i see my hash rates goes down by some 20-30 depending on the video i see & when i listen music, i dont have to change -f1, winamp plays well.
VlC version is 1.1.7.
But i never saw CORE Mhz dropping. How should it drop?
Once i start system, my core & mem clk goes to default (900 & 1050) & i open MSI afterburner which increases core to what i set, but mem clocks dont get lower auto, so i reduce to max low, close afterburner & open again & now mem clk shows last set max low in middle & i further low it to 370. thats it. whether i mine or not, watching videos or not, until another reboot, i don't see any core or mem clk change.
Ah, now i got it, its due to catalyst control center which is installed by default. which has overdrive which changes it.
Please uninstall catalyst control center, if u dont feel needed.
I only installed ATI display driver, APP 2.3 or 2.4, vc++ & ATI catalyst install manager.
removed catalyst control center, WMV9/VC-1, AVIVO, Hydra, amd drag & drop, application profile.
I see no difference in running my system with the above only installed.
Hope this helps & can tip me also, if u feel