Video card memory limit on G5s under Linux

[Action Retro]

Hey all, hoping someone has heard of this - I've heard that, under linux, using a video card on a G5 with more than 2gb of memory can cause issues. Does anyone know any details about this?

I recently got one of those JuiceBox external video card power supplies, and I thought it would be fun to experiment with modern-ish PCIE cards on my Quad G5, but finding video cards to tinker with is difficult

Thank you!

 

[molten_software]

Want a GTX 950 just for tinkering? I've got a spare
edit: actually not sure how helpful, its a 2GB card

 

[Action Retro]

Want a GTX 950 just for tinkering? I've got a spare
edit: actually not sure how helpful, its a 2GB card

Oh wow thank you, definitely!

 

[demik]

It's not limited to GPUs and VRAM. It's related to PCI/AGP Bus or IOMMU. Logic board limitation that macOS has workaround for. Can't remember the detail exactly.

You will have stability issues with PCI Cards, Ethernet and so on with 2 GB+ of RAM as well, same thing with FreeBSD.

I think Quads are immune to it tho, let us know

 

[molten_software]

Oh wow thank you, definitely!

sweet, just sent PM