I have an ati HD4850 and the fan has gone.
It is a proprietary clip on moulded thing with an airflow shroud so screwing on a replacement is tricky and I am having no luck getting a genuine part. After market coolers cost more than the card is worth.
I notice a lot of ppl on forums saying they have modded their cards by just cable tying the fan to the heatsink. Looking in to cable tyes the basic ones are apparently safe up to 80 deg C but it just seems a little weird having the plastic and the heatsink in direct contact.
Anyone do anything like this before?