your monitor is 30" 2560x1600 right? the flashed card only support one dual-link at 2560 and one single link at 1920. Make sure you plug into the right port.
Great, will test it out immediately![]()
Most of the time you won't notice that extra bandwidth. Its used when the graphics card's memory is unable to fully store all of graphics data needed
Hi, I tested your m4890.rom on my XFX 4890. It didn't work :-(... I had to re-flash back with the original backup rom.
I noticed when I was flashing back, where it says:
OLD ... BOARD 850E ... (ROM you provided).
NEW ... BOARD 875E ... (this is the original version).
I am willing to try again and do other tests... do you want to work to get this rom good for the 4890?
Most of the time you won't notice that extra bandwidth. Its used when the graphics card's memory is unable to fully store all of graphics data needed - it then has to use the PCIe link to access the stuff needed, which is where bandwidth comes into play. A 1GB graphics card is unlikely to need to do this that much right now thus for most people a 1GB 4870 running on 16x PCIe 1.x will be just as good or better than a 512MB 4870 running on 16x PCIe 2.0.
As far as stream processing goes, well any memory access outside a card's memory will want to be avoided as much as possible anyway. For stuff like that, as mentioned above, having more VRAM is usually better than having a slightly faster bus connection.
That's simply because that ROM is nothing more than a dump of the original the card came with.
I didn't flash my card to get it working in Mac OSX. I used ATY_init.
http://blog.macsales.com/tag/ati-radeon-hd-4870Our back room gurus tested the NVIDIA GeForce GT 120 and the ATI Radeon HD 4870 graphics cards from the early 2009 Mac Pro in the 800MHz and 667MHz Mac Pro models with varying success. The quick results are: GT120 functions, in both ports, in 800MHz Mac Pro.
Mac Pro ‘800MHz Memory Bus Models:
———-
4870 - Works A-OK via its DVI port. No-go via the miniDisplay Port.
GT120 - Works like a champ with both DisplayPort and DVI Port.
Mac Pro ‘667MHZ Memory Bus Models:
————
No go with either of Video Cards from the new Mac Pros.
Good.I have an OEM Apple 4870 and it works A-OK in my first gen, just like the flashed ones.
This is partly off topic, but I have found this rather old report :
http://blog.macsales.com/tag/ati-radeon-hd-4870
What? The apple 4870 does not work in 667MHz Mac Pros? (I suppose they correspond to Mac Pro 1.1).
I suppose this is not a driver issue, since the card worked in Mac Pros from 2008, and those do not ship with the drivers.
Interesting also: no video from the displayport, but this is probably due to the lack of drivers, unless the card from the 2009 Mac Pros slightly differs from the OEM card, which is given as compatible by the Applestore.
This got me thinking: is there any reliable report of an *Apple* 4870 working on a Mac Pro 1.1? All I remember is reports on *Flashed* 4870 and some insinuations by Barefeats.com, without direct confirmation.
EDIT: well, Rominator and Rob-art were already onto it and the report is quite lacunary. Not sure if it is reliable, but the fact that they couldn't get the card to work on the 2006 Mac Pros, while getting one port working in the 2008 Mac Pros is intriguing.
So has anyone upgraded to 10.5.7? Any news on the results with flashed 4870s?
4890/4870x2 users - dont update to 10.5.7 just yet, you will loose qe/ci (atiradeonx2000.kext will be replaced with unpatched one)
I'll make new patched kext tomorrow morning.
I just installed the update and I didn't notice any differences from 10.5.6. for VGA the adapter trick is still needed, still 2.5 GT/s and everything seems to work (or not) as before
Did you have to uninstall the kexts that were installed with "MacOSX_10.5.6_radeon_hd_48x0_drivers.pkg"?
Thanks.
Justupdated to 10.5.7 and a 4870 1 Gig XFX works EXACTLY the same so far.
OpenGl View scores were within 1%-2%
Haven't tested everything yet though