I've spent much of the evening reading most of the 4870 and 4890 threads in this forum. My thanks to EVERYONE for all the tinkering and tweaking in order to help your fellow Mac users save some bucks on a faster video card!!!
After much consideration, I decided I wanted to upgrade my Mac Pro 1,1 from the Radeon X1900 to a faster graphics card that's also OpenCL compatible but to do so for as little money as possible. I don't play any games on my Mac Pro (well, I fiddle around with MAME from time to time) and, really, the only CPU and GPU intensive apps I use are Apple's Aperture and (to a much less extent) Photoshop. My digital SLR makes really big RAW files (22+MB) and I'll frequently be importing 300-400 images into Aperture at a time. If I try to work with images at the same time Aperture is importing, I can get the fans going pretty good on my Mac Pro. I'm confident that a forthcoming version of Aperture will take advantage of OpenCL so that should help. But, of course, I need a OpenCL compatible card.
I strongly considered a 4890 card but three things slowed me down. One, they are more expensive than 4870 cards (see "for as little money as possible" above). Two, the 4890s possibly require the reinstallation of the drivers each time a new OS version is released. And, three, it's looking pretty difficult to find a card that is known to be flash-friendly.
So, with those considerations in mind, I settled on getting a 4870 card. And, since I don't play graphics intense games, I also figured the 512MB card would be plenty of VRAM. Heck, after all, that's what Apple sells, right?!
Anyway, thanks to a flash-friendly confirmation by ManiG in message #1768 (page 71), I decided to get an XFX HD-487A-YHFC. The card looks exactly like the one
shown here, except the one I ordered is the 512MB version.
The card is supposed to be delivered by next Tuesday. I got it for $134.99 with free shipping and no sales tax. That compares very favorably to the $350 I would have had to pay for the Apple 512MB 4870.
Now a question..... Should I follow the flash procedure listed at the
link above (Bootcamp or Windows flash), or, is it likely I'll be safe using Cindori's flash.app posted several pages back in this thread, and also posted
HERE?
Cindori.... BTW, I'm not clear... is there a separate flash.app for the 4890 and 4870 or are they really just the same app?
Fingers crossed it all works out!
Mark