Hi again Patio, and group.
I think any PC tech would agree that the fans on video cards are the pits (cheap crap) and will be the first ones to GO in any PC.
When the one on my own vid card started growling, I took it out, cleaned it, re-oiled it and put it back in. A few months later I had to do it all over again. Then it finally bit the dirt and totally froze up.
I took it out and replaced it with a CPU fan from an old K6 chip. I secured it to the top of the heatsink with HOT Glue.
The larger fan is very quiet and provides much better cooling than the stock fan.
Here's that video card with CPU fan.
So, take out the fan, clean it and the heatsink, really good and that may help.
When those little fans and their heatsinks get dirty, cooling suffers and the fans will have to run harder to cool the GPU.
Good Luck Mate!