gpu usage minor random spikes on idle

Mico Austria

Honorable
May 31, 2013
18
0
10,510
i have a sapphire 7850 OC edition.
my gpu usage spikes from 0% - 4% - 0% - up to 21% randomly on idle. is this normal. any ideas what's causing this? im curious if this would harm my system.
or is this some kind of bug on gpuz?
 

Mico Austria

Honorable
May 31, 2013
18
0
10,510
now im experiencing random spikes from 0% - 80% when browsing or in youtube.. is this normal?. watchin videos or browsin shouldnt be using that much load on my gpu right?

edit: ive print screened my gpu status. here it is http://www.4shared.com/photo/qUBLaSfj/gpu.html?
and sometimes my cores/mem fluctuates when tabbing from a game on windowed mode to 300-450-1050core/150-1250mem.