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 1 
 on: November 17, 2017, 12:55:30 AM 
Started by jeanlain - Last post by jamesb
I have a HD XFX 6870 Dual fan part number HD687A-ZD and have not had the result I have hoped for. None of the ports are capable of producing the typical Apple boot screen.
The third bite on the original Rom is 80 which converted to decimal is 128. Opening terminal I ran blocknum=128 size=$(($blocknum * 512))dd if=6870.efi.rom of=pc6870.rom bs=$size seek=1 conv=notrunc : then in terminal  python fixrom.py pc6870.rom pc6870.rom. Not sure what is wrong here perhaps more skilled heads can prevail with some assistance.  I have attached the original Rom issued with the card for reference and an image of my card.
 

 2 
 on: November 13, 2017, 03:43:05 PM 
Started by eVasilis - Last post by eVasilis
GTX1080 couldn't overdraw 2 @ 6pins to save it's life.

Like Dual Exhaust on a V-6. Looks nice, not needed.

So in this particular one it's a gimmick. Nice...

 3 
 on: November 13, 2017, 11:39:18 AM 
Started by MacEFIRom - Last post by Rominator
Use Macs Fan Control.

Where is the fan control?



Or jam a pencil in it.

 4 
 on: November 13, 2017, 11:38:26 AM 
Started by eVasilis - Last post by Rominator
GTX1080 couldn't overdraw 2 @ 6pins to save it's life.

Like Dual Exhaust on a V-6. Looks nice, not needed.

 5 
 on: November 13, 2017, 11:36:39 AM 
Started by Spacedust - Last post by Rominator
VGA?

Really?

 6 
 on: November 10, 2017, 05:56:52 PM 
Started by Spacedust - Last post by Spacedust
I got black a screen on DVI post boot on Gigabyte HD7970 as well. I need to reconnect the cable to make it working.

 7 
 on: November 10, 2017, 10:45:33 AM 
Started by Spacedust - Last post by Fl0r!an
VGA connections (which VGA through DVI-I is) have not been supported by macOS for at least a decade now. It still can work on some GPU/driver combinations, but it's not reliable. It has been better for AMD GPUs than Nvidia or Intel, but I wouldn't be surprised if Apple finally decided to drop it.

Any active DP to VGA adapter should do the trick though.

 8 
 on: November 09, 2017, 06:15:24 PM 
Started by Spacedust - Last post by Fangio
So finally got ahold of a mDP<->VGA adaptor instead, incl. Apple Logo (MSRP ~30€ Undecided OUCH). 18" Sony works fine again

There's definitely something wrong different how High Sierra handles the DVI port of Tahiti cards. Just sayin'..

 9 
 on: November 08, 2017, 05:49:39 PM 
Started by Rominator - Last post by muellmaa
any news on this? or are we gonna wait until there will be the modular nmp?

 10 
 on: November 07, 2017, 03:40:50 AM 
Started by eVasilis - Last post by h9826790
Hi all

I am thinking of putting this, https://www.evga.com/products/product.aspx?pn=08G-P4-6284-KR, in a 2010 mac pro. Would you recommend it? Its max power draw is 215 Watts but it has 2x8 pin sockets. What about the cables required?

Thanks in advance

Pretty sure all you need is just two mini 6pin -> 8pin cable.

As you said, it doesn't need 2x8pin at all. Most likely it's just there to make people believe that's a powerful card (marketing purpose). Since the Pascal card's rom is locked. I believe a general user is impossible to OC the card to draw more than 300W.

Anyway, dual 8pin card has it's advantage (even though it's not required). The power draw most likely will be more even, but not heavily rely on the 8pin (in a 6+8 config). Therefore, two independent mini 6pin -> 8pin should work.

If you want to play safe. You can always go

dual mini 6pin -> single 8pin -> dual 6+8pin

In this case, no matter what's the config of the card, and what's the power draw distribution. The two mini 6pin will always evenly demanded, and can practically deliver up to around 240W to the card before hitting the shutdown protection. (N.B. if including the slot power, that's more than 300W in total)

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