Yokemate of Keyboards
Posts: 4912 from 2009/1/28
From: Delaware, USA
Yes, I own an X1900GT PCIe card, its in my Quad core G5.
I've never seen the BTO X850XT, but there is a rom available, so it probably exists (or the rom is a modified X800XT rom).
In any case, were the card is producing artifacts, it would not be a driver issue.
But from the description...its harder to diagnose.
I once considered modding and X850XT for G5 use, but the difference wasn't significant enough for me to bother.
The driver should work with an X850XT, its basically the same gpu, only clocked higher.
I don't know if its ever been tested though.
In the case of the R500, I know cards not even listed can work.
If I remember correctly, Ffrank even bragged about having an X1950XTX (which is a 512mb card with higher clock speeds).
Maybe I should have one of these (the card you bought) shipped to South Africa.
One possibility would be to reflash this card with the Apple X800XT rom.
It could be that the card was flashed with the X850XT rom to overclock it.
AND if there is an incompatibility issue related to the X850XT rom, that would take care of it.
Again, normal X800XT cards work fine (jacek even owns a flashed PC card that works).[ Edited by Jim 20.04.2017 - 11:02 ]
"Never attribute to malice what can more readily explained by incompetence"