My stone cold data:
Qimonda
1D6V16-05A1F1C-40X
HVV22049
http://att.macrumors.com/attachment.php?attachmentid=201243&d=1257022940
Semaca & I have Identical part numbers.
There was a time where I must have had a "pumped" driver. The fan on the card was on almost all the time, and the gaming performance was ridiculously unstoppable. I could run full res 4x4 32bit, all shadows reflections you name it... without even a hiccup. But the room was hotter then a boiler after a few hours. I did land on a more stock install, and all was wonderful until the GFX update.
Can't speak to the part numbers being identical but when reviewing past posts in this thread you mentioned your card had Qimonda RAM chips and Semaca said his were Hynix so he couldn't use the ROM Peloche had made. I agree that you must have had some mis-matched ROM at the time because in normal use, even when stressing the card, I can't make out the fans at all.
Unfortunately, I didn't backup the original ROM - even though I asked openly many times to everyone here on how to do it. Again, another assumption by many without a concern other then their own. I still don't know what tool to use in order to pull my rom off, and I'm not even sure what ROM I have now. All I know was that I had to re-flash my card on a PC to undo what I did with the ATI Flash tool so long ago. I took a chance, it didn't work, I suffered.
Not to jump on you here but this thread is littered with information on how to perform a ROM dump. It may not have been specifically directed at you but the information is there nonetheless. The simplest method is to use a utility called GPU-Z under Windows. This requires the proper drivers from ATI for your card to be installed first, otherwise it won't detect your card properly. Once you have GPU-Z running look for the line displaying the BIOS Version of the ROM currently loaded. At the end of the entry you'll see an image of a microchip with a green arrow, you will click this in order to save the ROM to disk. Simply pick a name for the ROM, it should suggest one, and where to save to. In case you have multiple cards installed make sure to have the 4890 selected from the drop-down at the bottom of the window before dumping the ROM.
I'm trying not to sound bitter here, but I would love nothing more then to never have to use any custom tools again just to work around Apples bi-annual system updates.
Just let me know what I need to do... stick with me, and I'll follow through.
I wouldn't say you come off as sounding bitter but I am detecting a defensive tone in your replies. I would like nothing more then to help you in whatever way I can so that your experience mirrors my own. Ever since purchasing my card, model HIS H489F1GP to be precise, I haven't had a single issue when it comes time to perform an OS X update. For me it's always been a matter of simply waiting for netkas to release his patch, install the OS X combo updater, apply said patch and restart. I would still like a copy of the ROM you're currently using and see if you can get a copy of the original from Altimeter88. Worst case scenario is you'll have to contact the manufacturer for a copy of it. Get me those two items and I can tell you pretty quickly if Zeus creates a custom ROM that deviates from the one you're currently using. Assuming it does differ I would recommend flashing your card with it right away, even if it doesn't solve your current problem.