Which XFX 6850?

[Cat Slobber]

Looking to purchase a XFX 6850 for my system, but wondering if the Double D version is compatible with Lion / Mountain Lion. I know the regular version is from what I've read elsewhere on the site.

http://www.newegg.ca/Product/ProductLis ... 50&x=0&y=0

 

[Gordo74]

It should work

 

[hacman]

dont buy ZCFC not working i return it , i dont know why , i have two HD 6850 ZNFC work OOB

 

[Cat Slobber]

I've seen a few different posts mentioning that the ZCFC works no problem. The Double D... no one really seems to know.

If anyone else would like to add their two cents, it would help immensely.

 

[jzhang18]

I tested 2 XFX ATI 6850 cards

XFX 6850 ZNFC works OOB. 2 DVI ports work, HDMI also works
http://www.newegg.com/Product/Product.a ... 6814150505

But for XFX 6850 ZCFC, Nothing works, neither of 2 DVI, nor 2 mini DisplayPorts.
http://www.newegg.com/Product/Product.a ... 6814150573

The first one ( 0x6739, 0x31101682), it is in Chimera list (ati.c source file), so Boot loader can recognize it.
The second one (0x6739, 0x31171682) is not in the list from source code, so Boot loader cannot recognize it.

 

[jzhang19]

Wow, it is working now in ML 10.8.2

Flash XFX 6850 ZCFC bios with XFX 6870 ZHFC. These are my steps
1. Download XFX 6870 ZHFC bios: http://www.techpowerup.com/vgabios/106421/XFX.HD6870.1024.110804.html
2. Create bootable USB Drive (I use Patriot 8GB orange thumb drive, instruction is easy to Google and get)
3. Verify MD5: 61c81ea08a029fed394ebaea60b3badf (this value is on the download page) with my download file using WinMD5Free.exe
4. Use RBE from http://www.techpowerup.com/rbe/ to get CheckSum value of my download rom file.
5. Boot from USB drive, under DOS C:> command line:
6. ATIFlash -cf my6870.rom -- verify CheckSum value with value from RBE tools, (0x6400 as I remembered)
6. ATIFlash -s 0 my6850.rom -- save my original bios from XFX 6850 ZCFC, just in case if I want restore it back.
7. ATIFlash -f -p 0 my6870.rom -- write 6870 bios into XFX 6850 ZCFC, after it is done, it asks me to restart my machine.

Restart my machine into ML 10.8.2, 6850 ZCFC works, GraphicsEnabler=Yes|No both are good.

Cinebench 11.5 gives OpenGL benchmark: 39.28
Boot into Windows 7:
Cinebench 11.5 gives OpenGL benchmark: 67.19

I tried a few AtiConfig values: Duckweed,Bulrushes,Gibba, Pithecia, Muskgrass, Lotus.
it turns out: none of them can raise benchmark value dramatically. Lotus makes slightly better: 40.26

So I keep this setting so far as now:
<key>GraphicsEnabler</key>
<string>Yes</string>
<key>AtiConfig</key>
<string>Lotus</string>
<key>AtiPorts</key>
<string>4</string>

2 monitors are connected and working under ML 10.8.2

If anyone has better configuration to increase Cinebench OpenGL value, I will really appreciate your post in this forum.

-Jack