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MIKX

macrumors 68000
Dec 16, 2004
1,815
691
Japan
Thanks. Can you provide more information on it?
It's a very rare card in mac environment. Are there issues with it after flashing?
About two years ago I got hold of a "made in Japan" knock off R9 270X" definitely non-reference.
I have since sold it but it ran OK used the Netkas 7950efi. Showed bootscreens.
To be honest 7950's and in particular .. the HIS 7950 ( best cooling ever ! ) are great for low demand users .. . 7970's for more stressful stuff.

Sorry i didn't keep records for the R9 270X and the ROM I made is probably useless for reference cards.
 
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Fangio

macrumors 6502
Jan 25, 2011
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18. AMD Radeon HD 7970 / R9 280X 3 Gb
Performance: 100% RPI. A very good card for power / price / performance ratio; ~ 10% faster than p.16, has more memory. Supports Metal 2 (Mojave).
[...]
Other: occupies 2 slots
The Gigabyte 280X variant doesn't block slot 2, I have a NVMe adaptor card there, fits easily. Had a Sapphire 7970 before that didn't block slot 2 either. When in slot 2 though both would block slot 3 of course. Also there are cards with more than 2 slots height, so maybe this point needs some clarification.
 
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Pentaxer

macrumors regular
Original poster
Oct 25, 2018
107
89
Russia
NVIDIA Geforce GTX 1080 8GB Founders Edition (FE), Unflashed
NVIDIA chipset: Pascal
NVIDIA CUDA cores: 2560
Metal Compatibility: GPUFamily1v4
macOS Compatibility: through 10.13.6 with NVIDIA Web Drivers
Power consumption: standard single 8-pin on GPU, powered via dual mini 6-pin to standard 8-pin
Outs: 3 x DP, HDMI, DL-DVI
Additional: https://www.nvidia.com/content/geforce-gtx/GTX_1080_User_Guide.pdf

Need additional information.
1. It can't be flashed to have Boot Screen. Right?
2. What the earlist version of macOS does it support?
 

zedex

macrumors 6502
Oct 21, 2018
312
134
Perth, WA
In the opening post @Pentaxer indicates the possible existence of a 'single-slot' gigabyte R9 280X / gigabyte Radeon HD 7970. Can anyone confirm or deny that such a card exists..? [PLEASE!!]
 
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Pentaxer

macrumors regular
Original poster
Oct 25, 2018
107
89
Russia
There is an inaccuracy.

The initial message was:
The Gigabyte 280X variant doesn't block slot 2, I have a NVMe adaptor card there, fits easily. Had a Sapphire 7970 before that didn't block slot 2 either. When in slot 2 though both would block slot 3 of course.

The card's foto.

The text in the fist post is change to: "There are Gigabyte and Sapphire versions that have two slots brackets but don't block nearest PCIE slot".

Thanks for the reply!
 

bsbeamer

macrumors 601
Sep 19, 2012
4,308
2,703
Need additional information.
1. It can't be flashed to have Boot Screen. Right?
2. What the earlist version of macOS does it support?

26. NVIDIA Geforce GTX 1080 8GB Founders Edition (FE), Unflashed
Performance: 259% RPI.
Power consumption: needs additional power (8 pins).
Outs: 3 x DP, HDMI, DL-DVI.
Compatibility: DirectX 12.0, OpenGL 4.6, Metal GPUFamily1v4. macOS 10.12.x - 10.13.6.
Other: occupies 2 slots, no Boot Screen. NVIDIA chipset - Pascal. NVIDIA CUDA cores - 2560. User guide.
Unflashed (PC version): works without Boot Screen; can be flashed only by MVC.

#1 - As noted, needs to be flashed by MVC.
#2 - As noted above, Sierra at earliest.

Will note, this GPU does not need "additional power". The MP5,1/MP4,1 provides enough power without any modifications using both dual mini 6-pin cables. This is not "self powered" via PCIe, however. The stat, while it may be technically accurate, can be misleading and confusing. If this is to be a reference database for the future, would suggest rewording or relabeling cards powered this way.
 
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Pentaxer

macrumors regular
Original poster
Oct 25, 2018
107
89
Russia
Will note, this GPU does not need "additional power". The MP5,1/MP4,1 provides enough power without any modifications using both dual mini 6-pin cables. This is not "self powered" via PCIe, however. The stat, while it may be technically accurate, can be misleading and confusing. If this is to be a reference database for the future, would suggest rewording or relabeling cards powered this way.

Let's try that way - the variants:
1) from PCIE slot only;
2) 6 pins / dual 6 pins
3) 8 pins (cMP dual 6 pins -> 8 pins adapter is required);
4) 6 pins + 8 pins (needs some additional power from SATA);
5) dual 8 pins (needs much additional power - PIXLAS mod is required).
 

Pentaxer

macrumors regular
Original poster
Oct 25, 2018
107
89
Russia
We have found the chipest ond coolest GPU with Mojave support - Sapphire Pulse Radeon RX 550. It's TDP is only 50 Watts (RX 560 has ~ 75 Watts TDP).
A man in the link above told, that 2 Gb card version doesn't work.

Need additional information - do another RX 550 4 Gb work in Mojave?
 

Pentaxer

macrumors regular
Original poster
Oct 25, 2018
107
89
Russia
Very interesting document.

The opinion: each 6 pins connectors on MacPro's motherboard can provide 120W.

But i don't want to venture with my cMP :)

burned-power-supply.jpg
 

startergo

macrumors 601
Sep 20, 2018
4,792
2,193
Very interesting document.

The opinion: each 6 pins connectors on MacPro's motherboard can provide 120W.

But i don't want to venture with my cMP :)

Today I was testing in Win10 Furmark my RX580 6 pin card. I tried a stress test then minimized the window then pressed again on the window in the taskbar and it restarted. Repeated the test 3-4 times with the same result. I measured the current with a Fluke 189 and a Fluke probe recording max current. Max current peak recorded was 8.1 Amps (around 96 W) from the boost connector A. I repeated the same test with dual 6 mini pin to 6 pin connector without any problems. What I noticed is that boost A and boost B were providing different amperage which means the impedance of the both branches is different. Boost A was 2.2 and Boost B 3.3 Amps. The moral of the story is that even a card with 75W input may need more power to work properly in extreme conditions.
 

TeamSPAM

macrumors newbie
Apr 6, 2019
2
2
AMD Radeon RX 460 2 Gb
Performance:
Power consumption: from PCIE slot only. (75 W)
Outs: DL-DVI-D + DP + HDMI.
Compatibility: DirectX 12, OpenGL 4.5, Metal 2
Other: occupies 2 slots, no Boot Screen.
Unflashed (PC version): works out of the box

Not sure how to get the RPI so I'm leaving it blank. This was put into a cMP 4.1>5.1. Was able to install Mojave with no issues.
 
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Henninges

macrumors member
Sep 24, 2017
84
30
Helmstedt / Germany
FYI

gtx titan black is working as well as the gtx 780ti, compared to eachother i see no different in them because they are based on the same kepler gpu. the benefit of titan black is the 6gb memory, while the 780ti is a little bit higher clocked.
i used a gtx780, gtx780ti and titan black in my cMP.

power consumption is too way high, under full load i always got system shut down.

i prevent this by using an evga powerlink adapter.

AFAIK, there is no custom rom to efi flash it by yourself.

it works OOB in mojave but cuda acceleration is not available because of no driver from nvidia.
 
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w1z

macrumors 6502a
Aug 20, 2013
692
480
Quoting MacVidCards

But forgotten here is that a GTX780 can run rings around either of those two. The 3g version is popular but 6G version far more useful, and is supported. The creme de la creme of Kepler was Titan. But hard for most to tell a Kepler Titan (supported) compared to Titan Black (which was NOT supported in the OS last I checked, and is confusingly, not black but silver like the one that IS supported )

Also, listed as needing drivers here
 
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w1z

macrumors 6502a
Aug 20, 2013
692
480
well...mine is the living proof that this statement is wrong.

Can you please boot into windows and share with us a screenshot of techpowerup's GPU-Z output? This helps us identify which brand/model/GPU chip/memory speed is compatible without drivers.
 
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h9826790

macrumors P6
Apr 3, 2014
16,614
8,546
Hong Kong
Today I was testing in Win10 Furmark my RX580 6 pin card. I tried a stress test then minimized the window then pressed again on the window in the taskbar and it restarted. Repeated the test 3-4 times with the same result. I measured the current with a Fluke 189 and a Fluke probe recording max current. Max current peak recorded was 8.1 Amps (around 96 W) from the boost connector A. I repeated the same test with dual 6 mini pin to 6 pin connector without any problems. What I noticed is that boost A and boost B were providing different amperage which means the impedance of the both branches is different. Boost A was 2.2 and Boost B 3.3 Amps. The moral of the story is that even a card with 75W input may need more power to work properly in extreme conditions.

That 8A is display limit. Your card most likely drawing more 100W at that moment.

The difference between A and B should be erroneous. If you install the card in slot 2, that difference should disappear.

For stress test, should not use window mode. But use Full screen mode, native (or even higher) resolution, no AA.
[doublepost=1554630938][/doublepost]
Quoting MacVidCards

Also, listed as needing drivers here

Kepler has Rev B card which was not natively supported in OSX. But Apple fixes that few years back, all Kepler GPU should be supported natively in MacOS.
 

Henninges

macrumors member
Sep 24, 2017
84
30
Helmstedt / Germany
dont have WIN on cMP but can take a shot later from pc...no problem.

but there arent different versions of the titan black, all are based on on kepler gpu with gk110-430-b1 chip and 2880 su's.
the 780 w/wo is using the gk110-300 or 425 gpu's, while the 425 variation also have 2880 shading units but the 300 just have 2304.

all of them have nativ supported in macOS since lion AFAIK.
 
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w1z

macrumors 6502a
Aug 20, 2013
692
480
Kepler has Rev B card which was not natively supported in OSX. But Apple fixes that few years back, all Kepler GPU should be supported natively in MacOS.

Good to know. I am still confused as to why he would recently list it as requiring drivers and not supported though.
[doublepost=1554631388][/doublepost]
dont have WIN on cMP but can take a shot later from pc...no problem.

but there arent different versions of the titan black, all are based on on kepler gpu with gk110-430-b1 chip and 2880 su's.
the 780 w/wo is using the gk110-300 or 425 gpu's, while the 425 variation also have 2880 shading units but the 300 just have 2304.

all of them have nativ supported in macOS since lion AFAIK.

Thank you for sharing this information.
 
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