NVIDIA GTX 1070 fan not working

I started noticing severe slowdown after a short period of gaming and looking at MSI Afterburner I figured out that my graphics card was running too hot (95-100 C).

I opened up the case, cleaned up a small amount of dust and ran a benchmark test (Heaven benchmark). This completed okay, but the fan on the graphics card never switched on even though the temp reached 95 C. It seemed to start to turn a few times but never started spinning properly or consistently.

The card is around 3 and a half years old and has worked absolutely fine up to this point. There don't appear to be any other problems with the computer.

I'm trying to figure out if there's any other potential cause, or if the card is dead. Thanks in advance.

Specs below:

Operating System Windows 10 Home 64-bit CPU Intel Core i5 6600K @ 3.50GHz 30 °C Skylake 14nm Technology RAM 16.0GB Dual-Channel Unknown @ 1500MHz (15-17-17-35) Motherboard ASUSTeK COMPUTER INC. Z170-A (LGA1151) 31 °C Graphics Acer V223W (1680x1050@59Hz) 4095MB NVIDIA GeForce GTX 1070 (NVIDIA) 43 °C Storage 232GB Samsung SSD 850 EVO 250GB (SATA (SSD)) 37 °C 1863GB Seagate ST2000DM006-2DM164 (SATA ) 31 °C Optical Drives No optical disk drives detected Audio Realtek High Definition Audio