Update.
Well I tried types of Fan cooling sizes,right up to 40 cm (15") in size and made no difference really.Pulled other side panel off as well.
Cleaned out Tower again with air and a brush.Unclipped CPU fan and heatsink,and found the white thermal paste dry and hard.Cleaned with Metho,bought some new grease and applied.Can't find Tower Side panel as I put it somewhere so I wouldn't lose it.LOL.After 2 tests of 15 odd hours this is the reading now which it is staying around.I just feel better theTMPIN2 is lower than previous,graph I posted.Will not bother to find cover,and put back on, if it stays around these figures.
Thanks Guys, for you help, and I am still amazed, how quick members problems are attended to.Keep up the good work.
http://i29.tinypic.com/1yssqh.png