I'm guessing that these readings are for a desktop computer and not a laptop since speedfan is showing a reading for a GPU fan. That 81C reading for Temp3 is definitely on the high side, expecially if your computer isn't doing anything when the reading was taken.The two most likely reasons for heat build up are dust and insufficient space around the tower (walls, carpeting, etc blocking air flow.)
These articles outline some preventive measures and maintenance tips to improve cooling for desktop PCs.
Computer type Laptop System Manufacturer/Model Number Sony Vaio VPCEB47GM Laptop OS Win 7 Pro 64-bit CPU Intel i5 2.4 Ghz Memory 8GB DDR3 Graphics Card Intel HD 3000 Sound Card IDT High Definition Monitor(s) Displays 15.6 WGXA Anti-Glare LED Screen Resolution 1280x800
Hard Drives 640Gb 7200rpm Antivirus MSE Browser Opera (primary) with IE9 backup
How can I make sure that my core is not hot? problems?