The OEM was grey.
Do yourself a favor and spend your time on 4870.
IORegistryExplorer output file is too big to post as a forum attachment.
Try my ROM dump of the Mac 3870 instead
View attachment 183677
I ended up running an ATI 3870 Mac&PC Edition with Akasa Neo Vortexx 2 slot cooler eventually. So in terms of benchmarking and original ROM I can allways help people who want to explore this. I also have a PC 4870 but do not use it most of the time because there is no need and higher power consumption.
The single slot blue ones have a 2 wire fan, which may explain their poor fan control.
I have a blue card a with 2 wire control and it is very satisfactory with the 2 slot Akasa cooler. I never hear it.
But they really aren't worth the bother. A 4870 is TWICE as fast at most things.
Hope I did this right. You should have mail.
The bios you posted did not work when I flash it into my pc 3870 ddr4 512mb.IORegistryExplorer output file is too big to post as a forum attachment.
Try my ROM dump of the Mac 3870 instead
View attachment 183677