Seeking cheap silent graphics card for MacPro3,1 in place of ATI HD 2600
The Radeon HD 2600 in my MacPro3,1 (Early 2008) is making too much noise. It's whining to the point of being annoying. If I force its fan to stop, the MacPro gets nearly silent.
I have been looking for replacement cards but most of them seem to be rather expensive. I already have a rather fast card in there (a Geforce 660 Ti), so I don't need another fast card - I only need one that I can attach my secondary monitor to in order to see the startup screen (the 660 Ti doesn't support the Mac's startup screen).
I had tried installing a GeForce 7300 GT, which is fan-less, but found that not to work in this Mac model.
What other options do I have for finding a cheap and noiseless graphics card for the MacPro3,1 that supports the startup screen?
Mac Pro, OS X Yosemite (10.10.5), null