Help replacing graphics card/ORIGINAL 2010 APPLE MAC PRO TOWER 5.1 (Mid 2010) OS High Sierra v.10.13.6.
Trying to replace the original ATI Radeon HD 5770 1024 MB with a new XFX Radeon
RX-560 in order to upgrade from High Sierra to OS Mojave, which requires a “metallic” graphics card. I removed the old 5770, plugged in the 560, turned everything back on and got nothing--no picture, nada. After about 30 seconds, the computer shut itself down. Replugged the 5770 back in & everything came back, with an ERROR message that the computer did an emergency shut-down-”crash?”
I never put the install disk in the computer as I had no picture to work with, so now with the 5770 installed, I checked the install disk--programs are there including a setup.exe. Do I somehow have to put the install disk in the drive, shut everything down, pull the old 5770, plug in the new 560, then turn it on & hope that the install disk will automatically load the driver as the computer boots up?
This 560 came w/a STOP--IMPORTANT DRIVER INFORMATION: The driver on the included installation disk are recommended for systems NOT CONNECTED to the internet...” and to “download the latest drivers from the internet,” but I can’t do that when the monitor is blank. Is there a step-by-step process I should be following?
It looks like there’s an identical (twin) power plug to the left of the mini power plug on the motherboard, and I have the necessary 6-pin mini to 6-pin standard power cords to use for both cards, so I COULD plug in both graphics cards at the same time, but I don’t know if one should have a “metallic” card online with a regular card.
I also don’t know if those two 6-pin mini motherboard plugs are, in fact, identical power supplies for two separate graphics cards, or if that other plug is for something else entirely.
This 560 came with a power cord that has a 6-pin standard (for the card) on one end and two “split”
3-pin cables on the other (like from a Windows PC ????), but Best Buy (and others) said this 560 card would work on the Mac Pros, as well. As I had no second power cable at the time I used the old 5770 cable, which is also 6-pin mini to 6-pin standard, on the new 560. Hope THAT wasn’t a mistake???
I would much appreciate all the help I can get. Thanks.
Mac Pro, macOS 10.13