Why is my AMD R9 200 overheating ?

All other processors are well within tolerances so why is my GPU running so hot ?

This is a recent development; started about 2 months ago. Yes, I have dusted it.

 

Operating System

    Windows 10 Home 64-bit

CPU

    Intel Core i7 4790 @ 3.60GHz    36 °C

    Haswell 22nm Technology

RAM

    24.0GB Dual-Channel DDR3 @ 798MHz (11-11-11-28)

Motherboard

    Dell Inc. 0KWVT8 (CPU 1)    28 °C

Graphics

    LG TV (1920x1080@59Hz)

    2048MB ATI AMD Radeon R9 200 Series (ATI)    82 °C