Voyager slow scrolling !

I noticed on my system,when using voyager,scrolling the window seems to
slow down the whole system,also i noticed whenever i scroll down the page
with my mouse or even with the up and down keys,the cpu graphbar on the
right corner goes to 100%
i’m running a A7V with an AMD 900 Thunderbird
is this normal?
thanks for your time
best regards

wildelelie@chello.nl