Installed a 580 last night, with efi boot screen, a guy in Texas has em for around $250, boot screen is something I need, and like, and use.
Zephyr's Market , great communication, and fast shipping , unlike others....no affiliation, just sayin..And he sent the correct cable, I personally did not need it, I have pixlas mod.
It replaced 780ti, have latest boot rom, just went through replacing backplane, and power supply before hand.
Pretty much just plugged in in and it worked.
Don’t see the old nivida drivers at all. In OS X,
It all just worked in high Serra and Mojave, in Windows 10, I had some strange issues, after a few reboots, and removal of old drivers all is well.
Windows is play time for me and games.
Get work done in OS X.
Was a small bump in performance. But had a free sync monitor.
So enabled it, never saw my screen look that good.
The game doom is much more fun now. 60 FPS on my ultra wide.
And looks stunning.
High settings, no over clocking ,
not bad.
In windows you do have much more control over the card, like setting the fan, or overclock, the fan stopping was startling at first, till I got into windows and saw this is Normal, and gpu temps are very low when the fans do stop, In windows you can set the fan to run however you wish, I went back to stock auto settings, they work fine. Took awhile to understand what was happening here.
Just adding this, because the card works well in OS X, and the 5,1.
as long as the power and backplane are up to speed. And the card is good.
I also have the latest bootrom.
Many of Alex’s posts helped to get my old Mac back on track.
Keep working through issues you may have.
This card works well in the old 5,1 Mac Pro.
The best part is not having a flag telling me drivers need to be updated, but no driver exists...as did with coda!