ask ko lang, anu normal working temperature range ng system and CPU?

mines sempron2200, replaced ko ung CPU heat sink, kasi nasira ung clip for the CPU fan.

sa bios, the CPU is registering 45-53 deg.C and the system goes from 20-30deg.C with the cover on.

is this normal?the fan is registered to be running at 4680-4710rpm.

naglagay me ng thermal paste, pero di ko sure kung kulang or sobra, basta mga approx. 1mm bead nilagay ko sa center ng processor....