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flowrider

macrumors 604
Nov 23, 2012
7,323
3,003
Hi guys,

Did not want to start a new thread so hoping it is fine to ask this question here:

Is the 980Ti still the best option to get the highest GPU performance out of a Mac Pro 5,1?

I do not have one, but am looking at purchasing a 12-core used one later this year.

I do not do video editing but do handle anywhere from 42MP to +100 MP raw photo files and edit them in several different programs and will be driving at least one 4K monitor.

Thank you and great info already here on this thread. A big thumbs up to all that shared their knowledge.

Actually the 10XX series replaced the 9XX series. There is a 1080 Ti and a higher performing, with a greater power draw, GTX Titan Xp 12 GB (Pascal). There is a rumored 11XX series on the horizon. Do a forum search and you'll find info on them.

Lou
 
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AidenShaw

macrumors P6
Feb 8, 2003
18,667
4,677
The Peninsula
Actually the 10XX series replaced the 9XX series. There is a 1080 Ti and a higher performing, with a greater power draw, GTX Titan Xp 12 GB (Pascal). There is a rumored 11XX series on the horizon. Do a forum search and you'll find info on them.

Lou
Do the web drivers support the Volta-based Titan V on Apple OSX? A pricey card ($2999), but the question was about "highest" GPU performance.

The Titan V is 250 watts, with 8+6 pin connectors.
 
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h9826790

macrumors P6
Apr 3, 2014
16,656
8,587
Hong Kong
Hi guys,

Did not want to start a new thread so hoping it is fine to ask this question here:

Is the 980Ti still the best option to get the highest GPU performance out of a Mac Pro 5,1?

I do not have one, but am looking at purchasing a 12-core used one later this year.

I do not do video editing but do handle anywhere from 42MP to +100 MP raw photo files and edit them in several different programs and will be driving at least one 4K monitor.

Thank you and great info already here on this thread. A big thumbs up to all that shared their knowledge.

Photo editing can hardly use any GPU power. A RX580 should do better than 980Ti in macOS for this purpose (assumption you having the latest MacOS).
 
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nampramos

macrumors 6502
Dec 14, 2010
451
32
Apologies, I should have used the word "highest" more carefully!

Funds are limited and I'm looking at best buck for bang.

I'm also now wondering if the Adobe suite can actually use the power of the GPU or it relies heavily on CPU?

If so, would it be a better option to spend the bucks on a CPU and RAM upgrades? And get a GPU that would drive a 4K monitor and maybe a 1080p as well but not much more than that?
 

h9826790

macrumors P6
Apr 3, 2014
16,656
8,587
Hong Kong
Apologies, I should have used the word "highest" more carefully!

Funds are limited and I'm looking at best buck for bang.

I'm also now wondering if the Adobe suite can actually use the power of the GPU or it relies heavily on CPU?

If so, would it be a better option to spend the bucks on a CPU and RAM upgrades? And get a GPU that would drive a 4K monitor and maybe a 1080p as well but not much more than that?

Which CPU you are using now?
 

nampramos

macrumors 6502
Dec 14, 2010
451
32
I mentioned in my initial post that I do not have one yet and will be buying a used one later this year. If I can find a good deal on the 12 core one, I'd go for that. I also found out about the Radeon Pro WX 7100. Not as cheap as I'd like though...
 

beingalitaheri

macrumors newbie
Aug 18, 2018
5
2
Not really, there are plenty of ways to power a 980Ti in the cMP without an extra PSU. Even though you don't want to go over 75W from the mini 6pin. e.g.

2x mini 6 -> 8 pin + 2x SATA -> 6 pin

can power the 980 Ti without any mod, and make sure all parameter stay within official limit.


Hi,

I have a Gigabyte GTX980 TI which has two 8pin pcie (8+8) instead of 8+6 pin!
Do I have any chance?

How about this setup:
A. One Dual Mini 6pin to 8pin (Link)
B. Two SATA to 8pin (Somehow?!)

Officially, my card needs 600w and more!
[doublepost=1534652860][/doublepost]
I have a GTX 980ti FTW in my mac pro. It has two 8 pin connectors. Running one off the logic board (joined) and the other off the CD bay leads (joined) I have no problems. I run both windows and mac os. Certainly Windows takes full advantage of the card, and I have not had any problems or shut downs. It runs very hot though, so all the fans ramp up when it is under load.

Hi, can you tell me what kind of cables you used exactly? preferably with the store links :)
 
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h9826790

macrumors P6
Apr 3, 2014
16,656
8,587
Hong Kong
Hi,

I have a Gigabyte GTX980 TI which has two 8pin pcie (8+8) instead of 8+6 pin!
Do I have any chance?

How about this setup:
A. One Dual Mini 6pin to 8pin (Link)
B. Two SATA to 8pin (Somehow?!)

Officially, my card needs 600w and more!
[doublepost=1534652860][/doublepost]

Hi, can you tell me what kind of cables you used exactly? preferably with the store links :)

600W is the PSU requirement, not the card's TDP.

It's possible, however, you have to test the actual power draw of the card, and make sure it draw less than 110W on that particular 8pin you plan to connect to the SATA ports.
 

beingalitaheri

macrumors newbie
Aug 18, 2018
5
2
600W is the PSU requirement, not the card's TDP.

It's possible, however, you have to test the actual power draw of the card, and make sure it draw less than 110W on that particular 8pin you plan to connect to the SATA ports.

Cool, Tnx.

Can I, just as a quick test, use two cables "6pin to mini6pin" and connect each 6pin ends to the Graphic card leaving the other 2pin empty on each 8pin?

Or it may kill the graphic card?
 

h9826790

macrumors P6
Apr 3, 2014
16,656
8,587
Hong Kong
Cool, Tnx.

Can I, just as a quick test, use two cables "6pin to mini6pin" and connect each 6pin ends to the Graphic card leaving the other 2pin empty on each 8pin?

Or it may kill the graphic card?

NO, all pins MUST be properly powered, some card may be damaged if you turn it on without all pins connected.

If you have spare SATA ports, three SATA ports technically can power one 8pin.

Each SATA ports should rated up to ~55W, three of them can technically deliver up to 165W. And the 8pin should be programmed to not to draw more than 150W by default. Therefore, three SATA ports should able to “safely” power a 8pin (I quote the word safely because I am not sure if SATA ports can handle the power spike).

For quick test (e.g. bootability), not ANY high demanding stress test, you can use two single mini 6 pin to single 8pin just to turn on the card.

If you don’t mind to over draw the mini 6pin, your card may actually able to run stably in this config. However, generally not recommended. And if your cMP shut itself down at any time. STOP using this config, it’s definitely not safe.

For heavily factory OCed 980Ti. It’s better to go through the Pixlas mod.
 

AlexMaximus

macrumors 65816
Aug 15, 2006
1,233
577
A400M Base
Hi,

I have a Gigabyte GTX980 TI which has two 8pin pcie (8+8) instead of 8+6 pin!
Do I have any chance?

How about this setup:
A. One Dual Mini 6pin to 8pin (Link)
B. Two SATA to 8pin (Somehow?!)

Officially, my card needs 600w and more!
[doublepost=1534652860][/doublepost]

Hi, can you tell me what kind of cables you used exactly? preferably with the store links :)

As a user of the GTX 980 Ti SC EVGA card, I can state out of experience that there is only a very low risk of power problems, using the original cabling. Two years ago I was worried, but I never had any problems using just those two cables. However I think it was always borderline-ing on the max, so I have added a EVGA Powerlink a couple weeks ago to have the best possible power balance.
The outcome was an even higher frame rate in bootcamp Win7. The card now seems slightly faster and the PCI intake fan on the MP5.1 runs slightly faster. This now is the best setup I ever had.
My recommendation for your usage:
Use the original cabling plus an EVGA PowerLink for your 980TI. Sind the PCB's are always the same and the cards only vary in the used cooler, chances are high that the power draw is the same across the board for all 980TI variations. The pixlar mod Y-adapter (second link) seen in the pic below is not used in my setup because I can not spare any SATA power.

PowerLinkEVGA.jpeg
 
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beingalitaheri

macrumors newbie
Aug 18, 2018
5
2
Than you so much, it helped me decide
NO, all pins MUST be properly powered, some card may be damaged if you turn it on without all pins connected.

If you have spare SATA ports, three SATA ports technically can power one 8pin.

Each SATA ports should rated up to ~55W, three of them can technically deliver up to 165W. And the 8pin should be programmed to not to draw more than 150W by default. Therefore, three SATA ports should able to “safely” power a 8pin (I quote the word safely because I am not sure if SATA ports can handle the power spike).

For quick test (e.g. bootability), not ANY high demanding stress test, you can use two single mini 6 pin to single 8pin just to turn on the card.

If you don’t mind to over draw the mini 6pin, your card may actually able to run stably in this config. However, generally not recommended. And if your cMP shut itself down at any time. STOP using this config, it’s definitely not safe.

For heavily factory OCed 980Ti. It’s better to go through the Pixlas mod.

Thank you very much, you helped me decide what is best for me.
I just exchange my Gigabyte980TI with an EVGA 1080SC which has only one 8Pin and is less power-hungry and maybe even a little more powerful.

Kind regards,
Ali
 

roobarb!

macrumors 6502
Jul 30, 2009
277
185
I just exchange my Gigabyte980TI with an EVGA 1080SC which has only one 8Pin and is less power-hungry and maybe even a little more powerful.
Belt and braces, you could still use an EVGA PowerLink with that and split the 8-pin load across both mini 6-pin supplies on the logic board. I got mine from eBay for £7 (about $9). Cheap for peace of mind and they really do work, given that they essentially just gang the lines together with a small capacitor bank.
 

beingalitaheri

macrumors newbie
Aug 18, 2018
5
2
Belt and braces, you could still use an EVGA PowerLink with that and split the 8-pin load across both mini 6-pin supplies on the logic board. I got mine from eBay for £7 (about $9). Cheap for peace of mind and they really do work, given that they essentially just gang the lines together with a small capacitor bank.

Can you elaborate how is that gonna help? Because it seems that EVGA PowerLink is only good for cable management! How using it suppose to split the 8-pin load across both mini 6-pin supplies on the logic board?

Even in the EVGA website, they don't advertise the PowerLink for splitting the load:
  • Dramatically improved cable management
  • Supports a variety of different PCI-E connections including adjustable spacing
  • Integrated solid state capacitors give you power filtering
 

flowrider

macrumors 604
Nov 23, 2012
7,323
3,003
Thank you very much, you helped me decide what is best for me. I just exchange my Gigabyte980TI with an EVGA 1080SC which has only one 8Pin and is less power-hungry and maybe even a little more powerful.

The main reason my GTX 780 is sitting in my closet, replaced the the GTX 1080, was power efficiency. The one 8 pin connector was a big draw for me.

Lou
 

h9826790

macrumors P6
Apr 3, 2014
16,656
8,587
Hong Kong
Can you elaborate how is that gonna help? Because it seems that EVGA PowerLink is only good for cable management! How using it suppose to split the 8-pin load across both mini 6-pin supplies on the logic board?

Even in the EVGA website, they don't advertise the PowerLink for splitting the load:
  • Dramatically improved cable management
  • Supports a variety of different PCI-E connections including adjustable spacing
  • Integrated solid state capacitors give you power filtering

They didn’t say that becasue no PC need that, but it does.
 

beingalitaheri

macrumors newbie
Aug 18, 2018
5
2
Okay, guys,

EVGA GTX1080 works beautifully, with 8pin to the dual 6pin converter that came with the box and the two 6pin to mini6pin that I already had.

Only one issue: (and I am asking here because it probably applies to every GPU)
I have a win10 installed and I also have the Mac Pro's original GT120 in the machine.

When I install the Bootcamp driver (which includes GT120 latest driver 342.01) the GT120 works and the GTX1080 kind of works. However, when I install the latest driver for GTX 1080 398.82, the GT120 completely stops working while GTX1080 works at best.

What should I do? Do you have the same problem with 980TI and an Old Mac Pro GPU?
 

h9826790

macrumors P6
Apr 3, 2014
16,656
8,587
Hong Kong
Okay, guys,

EVGA GTX1080 works beautifully, with 8pin to the dual 6pin converter that came with the box and the two 6pin to mini6pin that I already had.

Only one issue: (and I am asking here because it probably applies to every GPU)
I have a win10 installed and I also have the Mac Pro's original GT120 in the machine.

When I install the Bootcamp driver (which includes GT120 latest driver 342.01) the GT120 works and the GTX1080 kind of works. However, when I install the latest driver for GTX 1080 398.82, the GT120 completely stops working while GTX1080 works at best.

What should I do? Do you have the same problem with 980TI and an Old Mac Pro GPU?

Go to device manager to set the GT120 as Microsoft Basic VGA adaptor. Don’t use the “correct driver”. You can’t have two Nvidia driver in the same Windows. And the old version only work for GT120, new version only work for GTX1080.

So, only install the new driver. And let the GT120 only work as basic VGA adaptor.
 

roobarb!

macrumors 6502
Jul 30, 2009
277
185
Can you elaborate how is that gonna help? Because it seems that EVGA PowerLink is only good for cable management! How using it suppose to split the 8-pin load across both mini 6-pin supplies on the logic board?

Even in the EVGA website, they don't advertise the PowerLink for splitting the load:
  • Dramatically improved cable management
  • Supports a variety of different PCI-E connections including adjustable spacing
  • Integrated solid state capacitors give you power filtering
Apologies for the long delay, I lost track of this thread.

You are right, EVGA makes no mention of the electrical characteristics of the PowerLink. However, internally it simply gangs together the two inputs onto one bus bar, with a few capacitors for smoothing. Very simple, with the accidental side effect that you can split the load of any device over both mini 6-pin outputs. There are some pictures of the inside if you image search the product name.

I use it with a 1080 Ti, which is 8-pin and 6-pin. The 8-pin load was always around 8A when benchmarking, around 6A on the 6-pin. With the PowerLink it's generally balanced just under 7A on each. I've never had any shutdown issues in either configuration, but for just a few pounds it seemed worth the investment.
 
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nycedit

macrumors newbie
Apr 12, 2017
4
0
Hi Everyone,

I have a mid 2012 macpro desktop running 10.13.1 and installed
the GTX980ti 6gb graphics card. I installed the correct NVidia driver, made
sure it was the default driver, installed both cables 6pin-6pin and 6pin-8pin for power.

The card was never flashed for Mac- it was used on a PC desktop before.

When I boot the machine the light on the Nvidia card lights up and it sounds like the
machine completely boots up but the screen stays black. It never boots up the display.

Wondering if anyone has any recommendations for how I could get this card working?
1) are the two power cables sufficient or do I need to add two SATA to 6pin cables?
2) I tried the card in all 3 slots, is there an optimal slot (1)?
3) Anything else I can do? Reset Pram? Go into terminal and change settings?
 

h9826790

macrumors P6
Apr 3, 2014
16,656
8,587
Hong Kong
Hi Everyone,

I have a mid 2012 macpro desktop running 10.13.1 and installed
the GTX980ti 6gb graphics card. I installed the correct NVidia driver, made
sure it was the default driver, installed both cables 6pin-6pin and 6pin-8pin for power.

The card was never flashed for Mac- it was used on a PC desktop before.

When I boot the machine the light on the Nvidia card lights up and it sounds like the
machine completely boots up but the screen stays black. It never boots up the display.

Wondering if anyone has any recommendations for how I could get this card working?
1) are the two power cables sufficient or do I need to add two SATA to 6pin cables?
2) I tried the card in all 3 slots, is there an optimal slot (1)?
3) Anything else I can do? Reset Pram? Go into terminal and change settings?

Put the original GPU back in. Setup some remote desktop control (e.g. Chrome Remote Desktop). Then try again.

It won't fix the drive issue, but you can now remote login to see why your setup doesn't work properly. Or if the driver is really loaded etc.

And NEVER perform a PRAM reset with Maxwell GPU (unless you really know what you are doing), this action will disable the Nvidia web driver.

Anyway, please make sure either BOTH SIP and Gatekeeper are enabled (or disabled). But not only one enabled and the other is disabled.

In my own experience, both disabled work best.

Also, why stay at 10.13.1, but not go to 10.13.6? The early HS and web driver definitely has more issues.
 

nycedit

macrumors newbie
Apr 12, 2017
4
0
Put the original GPU back in. Setup some remote desktop control (e.g. Chrome Remote Desktop). Then try again.

It won't fix the drive issue, but you can now remote login to see why your setup doesn't work properly. Or if the driver is really loaded etc.

And NEVER perform a PRAM reset with Maxwell GPU (unless you really know what you are doing), this action will disable the Nvidia web driver.


Thank you so much for the quick reply, I will try your suggestion. Running out of ideas!
 
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