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Pictures as requested, not sure what you'll tell by looking at the PCB layout, but I included closeups of each chip that might be the flash...

Second set of pics...
 

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Please Help. could you run freedos , and type in NVFLASH --list

it tells what kind of EEPROM CHIP you have on the E-vga card !

Did a nvflash --check and got back:

EEPROM ID (C2,10) : MX 25L1005 2.7-3.6V 1024Kx1S, page

1024Kx1 = 128Kx8, so looks like I got a 128K flash. I preserved the original flash image, and it was only ~55k. eVGA didn't need the 128K, but I'm happy:)
 
did anyone see this "NEWS: Our sources confirm that Apple is working on a second version of the GeForce 8800 GT that *IS* compatible with the 2006/2007 Mac Pro. We will post the model or part number once it's available."

on the latest bare feats benchmarks page?
 
Did a nvflash --check and got back:

EEPROM ID (C2,10) : MX 25L1005 2.7-3.6V 1024Kx1S, page

1024Kx1 = 128Kx8, so looks like I got a 128K flash. I preserved the original flash image, and it was only ~55k. eVGA didn't need the 128K, but I'm happy:)

Mr Candy could you quickly explain how you checked your EEPROM

I have The FreeDos ISO and will burn it to cd. But I'm not sure How to get the nvflash 5.57 program on the disk or do I?
 
E-VGA 8800 GT worked perfect! I have an XFX Alpha Dog Edition that is DOA. I hope when I get a new one it works just as well. ($229 at Fry's after rebate)

nflash -4 -5 -6 mp8800gt.rom

Game on!
 
Ok if I have to run FreeDOS to check this I'm having problems figuring this out. Try to show some compassion. If you know of a simple way for me to tell you TELL me.

To use nvflash on the MP to flash my 8800GT I did the following:

1) Download the fdfullcd.iso from freedos.org - burn the ISO image to a CD.

2) While in OSX put the CD into the MP then do a restart. After your screen goes blank, press and hold the 'option' key while the MP reboots. You will get a screen that gives you options on what to boot from, you should have at least two and possibly three options. Pick the icon that looks like a CD and is likely labelled "Windows". Click the up arrow underneath the icon.

3) FreeDOS will boot and give you a splash screen with some options, choose 1 (Continue to boot FreeDOS)

4) There will be a bunch of text followed by another set of options, choose 3 (boot DOS with Himem etc.) NOTE: to select option 3, hit the number 3 key on the keyboard, do not attempt to use the arrow keys to scroll the selection up and down. No need to hit enter, immediately after entering 3 the system will continue to boot. You will see error messages regarding the CDROM drive, these can be ignored.

5) You will be left at a DOS prompt on A:, which I presume is a ram disk.

At this point you need access to the nvflash program and possibly some read/write disk area if you wish to save a copy of your existing flash image.

I have bootcamp installed and FreeDOS recognized this partition and mounted it R/W for me as drive C: - problem solved! I used OSX to move nvflash and the previously posted MP8800 image files to the root of my BOOTCAMP drive, then booted FreeDOS to save my original flash and re-flash with the mac image. Instructions provided in previous posts to this thread on how to use nvflash to check the size of your flash and perform the actual image update.

If you don't have bootcamp installed you could try two options, use the bootcamp assistant to install bootcamp to the part where it wants the Windows CD and then quit. At that point you should have a DOS formatted partition on your hard drive that FreeDOS will see and use. Proceed as above. I saw one post somewhere that said it was necessary to have the Windows installer format the bootcamp C: drive before it was useable. If this is true, then it may require that you use FreeDOS to format that partition before it can be used. Make sure you format the correct piece of disk;) When complete you can use the bootcamp assistant again to remove the DOS partition.

Second option would be to see if you could slipstream nvflash (and MP8800 image) into the FreeDOS image before burning to CD. Not sure on specific instructions on how to do this, having never needed to do it myself. This would allow you to flash a card, but not make a backup of the original image. Not recommended unless you're sure it will work. Could be used to test a card to check it's flash size in either a MP or PC.
 
To summarize for people just joining the thread, so far we have had success with Sparkle, Inno3D, PNY and some (but not all) EVGA.
 
Ok.. I flashed the card and everything was fine untill I installed drivers for it under Vista 64. Now the fan is stuck at full throttle! Drivers were Forceware 171 for Vista 64.

Thoughts?
evga 8800gt
 
Chalk up another successful flash, this time for the BFG 8800 GT OC, part number BFGR88512GTOCE, from BFG Tech.

The EPROM information for this board is as follows:

EEPROM ID (c2,10) : MX 25L1005 2.7-3.6V 1024Kx1S, page

(Exactly the same as what abisai reported above)

Now, I don't actually have a 2008 Mac Pro, I have the original base Mac Pro 2.66GHz quad core, so unfortunately this card still doesn't work for me in OS X (and yes, I tested it in the vain hope that maybe it might work in spite of what Apple said, but alas they were correct). My only real reason for flashing the card was so that I could see if it actually had a 128KB flash chip so that I could flash it with an EFI BIOS that does support the older Mac Pros when such a beast eventually comes out.
 
Chalk up another successful flash, this time for the BFG 8800 GT OC, part number BFGR88512GTOCE, from BFG Tech.

The EPROM information for this board is as follows:

EEPROM ID (c2,10) : MX 25L1005 2.7-3.6V 1024Kx1S, page

(Exactly the same as what abisai reported above)

Very NICE !well done , could you make a Foto of your BFG , Front and BACKSIDE , i am trying to get a Manual together, i need fotos of the 128K 8800 PC Cards
 
No joy for either of my BFGs

Chalk up another successful flash, this time for the BFG 8800 GT OC, part number BFGR88512GTOCE, from BFG Tech.

The EPROM information for this board is as follows:

EEPROM ID (c2,10) : MX 25L1005 2.7-3.6V 1024Kx1S, page

(Exactly the same as what abisai reported above)

I checked the two BFGs (same part number) that I run in my windows gaming box, but they both had 64K eeproms.

I am assuming they use the 64K parts when available and substitute the 128K parts when supplies of the smaller chip are unavailable.

I will try to scare up a PNY or eVGA tomorrow for further testing.

inCider
 
I checked the two BFGs (same part number) that I run in my windows gaming box, but they both had 64K eeproms.

I am assuming they use the 64K parts when available and substitute the 128K parts when supplies of the smaller chip are unavailable.

I will try to scare up a PNY or eVGA tomorrow for further testing.

inCider

WHAT PCB BOARD Color ? GREEN or BLUE ?

i guess BLUE ?
 
Though I am not using my 8800GT for a Mac Pro, I though it might be of some use to you guys to know that the XFX 8800GT Alpha Dog Edition in my PC does in fact have a 1024 chip. I just got done flashing faster clocks and a different fan setting onto it for my PC, and it reported the chip as 1x1024. The model number of my card is PVT88PYDD4.
 
As I mentioned above, XFX 8800GT XXX alpha dog PV-T88P-YHD4 is 64k ... however, I just found out that the same shop I bought this card in has an older model in stock (exactly one piece) which is exactly the part number mentioned by antsh (PV-T88P-YDD4). I will go for it and check the chip on it ... if it is 128, too, everything is fine, if not we all know that cards with same number can still use different chips and I will go and sell both cards on ebay ...
 
Second option would be to see if you could slipstream nvflash (and MP8800 image) into the FreeDOS image before burning to CD. Not sure on specific instructions on how to do this, having never needed to do it myself. This would allow you to flash a card, but not make a backup of the original image. Not recommended unless you're sure it will work. Could be used to test a card to check it's flash size in either a MP or PC.
I found a WIN program called "Ultra ISO" to do exactly that. You can open the FREEDOS.iso file, add nvflash and mp8800GT.rom to the ISO file (I placed them at the root level), then UltraISO will write the edited ISO file to a bootable CD-R. I tested the CD and it boots the Mac Pro just fine, giving you a command line as per mrcandy's description above.

http://www.ezbsystems.com/ultraiso/

mrcandy, a question: what is the file "cwsdpmi.exe" that comes with nvflash? Know what it's for?
 
Chalk up another successful flash, this time for the BFG 8800 GT OC, part number BFGR88512GTOCE, from BFG Tech.

The EPROM information for this board is as follows:

EEPROM ID (c2,10) : MX 25L1005 2.7-3.6V 1024Kx1S, page

(Exactly the same as what abisai reported above)

FWIW, it's exactly the same EEPROM information I got from the Apple 8800GT of my mac pro.
 
Wow awesome news this morning :D.
So, I'm going to buy a second-hand 8800GT (twintech branded) whose the pcb is green for only 190 euros (310 on the apple store). I asked the vendor to make a nvflash --check. If it return "1024Kx1" it's all good, am I right ?
 
Thanks for the thread guys, great work.

But I've registered to relay some bad news. I have an inno3D GREEN PCB 8800GT dated 49/2007 part number i-8800GT-H5GTCDS.

When I run nvflash --check it lists

eeprom id (1f ,65) : Atmel at25512a 2.7-3.6v 64kx8s, page

So a green PCB would appear to be no guarantee.


EDIT:

Tech report has some interesting info here regarding changes to the heatsink on the 8800GT. If you compare to this image here . you will see some subtle changes to the reference heatsink. Mine has the newer larger fan. So maybe if you find a card with the older smaller fan you will be OK.
 
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