cpu not cooling down

[GOB14]

i have a 3800x2 clocked to 2400 with a freezer pro in a chieftech dragon case
my temps are 36 idle and 48 under load,the problem is when iv had the cpu under load and reached 48 the cpu temp only drops back down a couple of degrees even after an hour doing nothing it still wont cool down any further,the case temps go back to norm(32) after 5 mins. can any one suggest the cause of this

 

[GOB14]

looked in task manager and there ws cli.exe running twice,then recieved warning that graphics card(850xt) was getting hot so restarted system and a app called gdi hung any one know what they are. anti virus does nt pick anything up

 

[GOB14]

googled it n got the answers,thanks for your help