All these cards have different power envelopes and requirements. You may be able to use the 6 pin if you modify the power table. Apparently in your case 6 pin can't power through the 8 pin on the card.
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Flashing R9 280X for boot screens/PCI System Information
- Thread starter Mr. Zarniwoop
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Ok so i can't use 2 sata ports, but i can try to use one.
So i just ordered a dual mini 6 pin to 8 pin cable and a sata to 6 pin cable.
This should do the trick no?
I really hope so.
if you don't perform videocard demanding tasks it should work. But it is nit recommended. I would also get an EVGA powerlink to combine all of them.
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But this way it has all the electric plugs it asks, with all the electrical needs.
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Because tgis card only has a 6 pin and a 8 pin connectors
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Os gosh, i'm really praying it works.
But i don't understand, i did read people online using this same card only with the 6 pin connected...
People are also using Clover on cMP... And here are the results:
OpenCore on the Mac Pro
Fastest and dumbest way to brick a Mac Pro, be smart and never do it:
forums.macrumors.com
Yes that is right 😂People are also using Clover on cMP... And here are the results:
People do many, how should I say, not so clever things.
OpenCore on the Mac Pro
Fastest and dumbest way to brick a Mac Pro, be smart and never do it:
But you think that is a possibility that it will work like this?
As I said if you don't do GPU high demanding tasks it may work. If the card tries to pull more than 54W from the sata port it may damage it. You can always do Pixlas's mod.
At least 2xmini 6 pin to 8 pin - and another 8 pin to 2x6plus2.
To give load balancing and to power both the 6 pin and the 8 pin.
In theory thats 225 watt max and overloads the board - but imo better than using adapters and blocking sata ports. Plus the danger of cross currents what may flow between sata and pcie Power ports.
Saviest is getting the power from the psu by pixlas mod or alike.
To give load balancing and to power both the 6 pin and the 8 pin.
In theory thats 225 watt max and overloads the board - but imo better than using adapters and blocking sata ports. Plus the danger of cross currents what may flow between sata and pcie Power ports.
Saviest is getting the power from the psu by pixlas mod or alike.
I will try that first then.
Thank you.
In the end if none of them work i can try to connect the power of the power adapter of my windows pc 😂😂
If you are going to do that you can do the pc power supply not in computer method for it. You can jumper the pins and turn it on without it being in machine.
How to Power Up an ATX Power Supply Without a PC!
How to Power Up an ATX Power Supply Without a PC!: In this instructable i will show you how to power up an ATX Power Supply without a PC. Maybe in some cases you want to test an old CD-Rom Drive or something else. All that you have is a PSU from an old PC an a wire. Here I show you how do to it.
Its not 100% clear: I mean two mini 6 pin to one single 8 pin. Like this
COMeap Dual Mini 6 Pin to 8 Pin PCI Express Video Card Power Adapter Cable for Mac Pro Tower/Power Mac G5 15-inch(38cm)
COMeap Dual Mini 6 Pin to 8 Pin PCI Express Video Card Power Adapter Cable for Mac Pro Tower/Power Mac G5 15-inch(38cm)
www.amazon.com
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Any photo? It's hard to know how you powering the card exactly, and hard to know if you do it correctly (or at least in a workable way)
Well, i tried with the 2x mini six pin to 8 pin and nothing, tried to put a 8 pin to 2x 6+2 pin on the tip of that one and the comouter doesn't even start. And unfortunetly i can loose two sata ports on the computer. One i could try but two is too much.
Looks like the only option is sell this card and buy another one.
I did read that the rx580 works without any problems with just a 8 pin.
Is there any specific version/brand of it that is better?
Would it work out of the box with my mac and the macos 10.12.6?
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thanks mate but it was not enoughIts not 100% clear: I mean two mini 6 pin to one single 8 pin. Like this
COMeap Dual Mini 6 Pin to 8 Pin PCI Express Video Card Power Adapter Cable for Mac Pro Tower/Power Mac G5 15-inch(38cm)
COMeap Dual Mini 6 Pin to 8 Pin PCI Express Video Card Power Adapter Cable for Mac Pro Tower/Power Mac G5 15-inch(38cm)www.amazon.com
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If you gonna buy RX580 I would recommend the reference model:
AMD Radeon RX580 8GB Reference Model
The #1 place for Mac Pro graphics cards. GPU upgrades from AMD and Nvidia.
www.macvidcards.com
Thanks for the answer.If you gonna buy RX580 I would recommend the reference model:
This card has 2 slots width and does not interfere with a device installed in the second PCIE slot. This particular model has an 8 pin connector. There is an RX-480 with a reference model design which looks exactly the same as this one, but it uses 6 pin connector. I personally have 2 RX-480 reference models, but some people do not recommend them due to excessive power draw from the PCIE slot.AMD Radeon RX580 8GB Reference Model
The #1 place for Mac Pro graphics cards. GPU upgrades from AMD and Nvidia.www.macvidcards.com
My budget roght now is about 100€.
So if i buy it would be in second hand.
That's why i would need to know if all of the models are ok and if it works out of the box with the sierra 10.12.6
Hi guys,
I have already done a few changes of the firmware in the graphics card, until today it is still 7950 and there have never been problems, even in cards that had a BIOS switch,
today I wanted to "make" the R9 280X for the first time,
the operation of adding efi itself went ok but after flashing the card nothing has changed, no boot screen, no full card name in OSX,
I switched the switch on the card to another BIOS and repeated the whole operation, this time everything as expected, there is boot screen, name 7950 in OSX
maybe my story will help someone
my card is:
Club 3D royalQueen Radeon R9 280X
I have already done a few changes of the firmware in the graphics card, until today it is still 7950 and there have never been problems, even in cards that had a BIOS switch,
today I wanted to "make" the R9 280X for the first time,
the operation of adding efi itself went ok but after flashing the card nothing has changed, no boot screen, no full card name in OSX,
I switched the switch on the card to another BIOS and repeated the whole operation, this time everything as expected, there is boot screen, name 7950 in OSX
maybe my story will help someone
my card is:
Club 3D royalQueen Radeon R9 280X
I switched the switch on the card to another BIOS and repeated the whole operation, this time everything as expected, there is boot screen, name 7950 in OSX
maybe my story will help someone
This is the expected behaviour of all 7950/7970 cards. Switch 1 is the legacy BIOS and is flashable. Switch 2 is the UEFI BIOS and is not flashable.
I had an HIS HD 7950 and currently ( my spare GPU ) is a Sapphire dual-X HD 7970. I EFI flashed both cards 9 AND downvolted the 7970.
NOTE : I always have used BIOS SWITCH Position #2
No issues at all.
============================
Example : ( this includes including the eVGa PowerLink )
forums.macrumors.com
NOTE : I always have used BIOS SWITCH Position #2
No issues at all.
============================
Power cables for the HD 7970.
TWO x Mini 6 pin - plus - ONE dual SATA to 6 pin.
NOTE : BOTH of the 7970's power sockets must be powered.
TWO x Mini 6 pin - plus - ONE dual SATA to 6 pin.
NOTE : BOTH of the 7970's power sockets must be powered.
Example : ( this includes including the eVGa PowerLink )
EVGA PowerLink with AMD GPUs
Just got the EVGA PowerLink working with my Sapphire Dual-X 7970 3gb. IMPORTANT : The power input sockets on the PowerLink are 2 X 8 Pin female and cannot be changed. The EVGA PowerLink ensures that exact power demanded by a GPU is supplied. That said, one must still supply enough power to...
forums.macrumors.com
I have a visionTek R9 280X flashed with HD 7970MAC's efi portion. It shows boot screen without any problem. However, it fails to boot my BootCamp windows 10, and gives black screen, while my second-slot working card geforce GT 120 gives error message "Video TDR Failure", and finally the system gets rebooted. I tried to resolve this by following suggestions on youtube, say, to unintall/re-install AMD drivers, set the wifi card to power saving mode, etc, but it still has this problem. The screen is black, and the system get rebooted until letting you change settings/do trouble shooting. The stock UEFI coming with the card works fine. Anyone has this issue? Any advice would be appreciated.
My configuration: Mac Pro 2009 with 2 6-core X5690 cpus, 32GB ram, flashed from 4,1 to 5,1. OS is High Sierra with 140.0.0.0 bootrom/firmware (installed using Mojave installer but without actually upgrading to Mojave as I still would like to use GT 120). BootCamp Windows 10 installed using DVD image (legacy bios) on a separate SSD.
My configuration: Mac Pro 2009 with 2 6-core X5690 cpus, 32GB ram, flashed from 4,1 to 5,1. OS is High Sierra with 140.0.0.0 bootrom/firmware (installed using Mojave installer but without actually upgrading to Mojave as I still would like to use GT 120). BootCamp Windows 10 installed using DVD image (legacy bios) on a separate SSD.
I had the same issue and I managed to find the solution. It is because that Windows 10 wants to verify signature but failed, and therefore refuses to boot. It is easy to fix by disabling enforcing the verification. You can only execute following command in cmd windows (under administration)
bcdedit.exe /set nointegritycheck on
Later on if you want to restore the integrity check, then run following
bcdedit.exe /set nointegritycheck off
The you will be able to boot after rebooting.
By the way, are those Mac7950.rom and Mac7970.rom posted on the netkas are really from MAC edition cards? I am asking this question, because I found there are many settings not following the ROM specification. One example is that the word at 0x2022-0x2023 should be the device ID, which is 0x679A for HD 7950 or 0x6798 for HD 7970. But they are both 0x6708 in the rom file. I checked that no any GPU made by vendor 1002 has device ID 0x6708.
bcdedit.exe /set nointegritycheck on
Later on if you want to restore the integrity check, then run following
bcdedit.exe /set nointegritycheck off
The you will be able to boot after rebooting.
By the way, are those Mac7950.rom and Mac7970.rom posted on the netkas are really from MAC edition cards? I am asking this question, because I found there are many settings not following the ROM specification. One example is that the word at 0x2022-0x2023 should be the device ID, which is 0x679A for HD 7950 or 0x6798 for HD 7970. But they are both 0x6708 in the rom file. I checked that no any GPU made by vendor 1002 has device ID 0x6708.