GTX 770 blank screen (Mac Pro 4,1>5,1)

[RA10P]

Hi all, i recently purchased a macpro 4,1 and flashed it to a 5,1 as well as upgraded the cpus and ram. I currently have the nvidia webdriver (387.10.10.10.25.156) installed running macos High Sierra (10.13.3). I scored a GTX 770 (Pc version, not flashed) from a friend (i still have the stock GT120) however with it installed i only get a blank screen. i have tried DVI cable and HDMI cable. It is installed in the 1st pcie slot and shows under my system report as the following:

Name: NVDA,Display-D

Type: Display Controller

Driver Installed: Yes

MSI: No

Bus: PCI

Slot: Slot-1

Vendor ID: 0x10de

Device ID: 0x1184

Subsystem Vendor ID: 0x10de

Subsystem ID: 0x0010

ROM Revision: preset 1.0.0

Revision ID: 0x00a2

Link Width: x16

Link Speed: 2.5 GT/s


I have both cards installed. i have tried booting with just the GTX 770. im not really sure what other troubleshooting to do or how to approach it. any help would be appreciated.

 

[h9826790]

This card was working in your friend's computer?

Did you try remove the GT120? Will that make any difference? (Before you do that, you may consider setup remote control so that you can see something in case still black screen. Any other Mac can do that via screen sharing. Otherwise, Google Chrome Remote Desktop can also provide this function for free)

Also, what's inside the Nvidia web driver control panel now

 

[RA10P]

h9826790,

Thanks so much for the reply. Yes the card was working in my friends computer he just installed a new card so we just pulled this one. I managed to get the card to work by using an auxiliary power supply. I havent narrowed it down to if it is the pci connectors on the motherboard, the mini 6 pin to 6/8 pins i was using. or a combination of both.

The card now properly shows in my system however it is only running at 2.5gt/s instead of 5.0gt/s like the GT120. I was under the impression that with the new nvidia web drivers these cards would automatically run at the PCIE2.0 speeds. Does anyone happen to know if this is because the card is not flashed or is it only the newer cards that automatically run at the 2.0 speeds?

Here is a picture of my current system information:

 

[h9826790]

h9826790,

Thanks so much for the reply. Yes the card was working in my friends computer he just installed a new card so we just pulled this one. I managed to get the card to work by using an auxiliary power supply. I havent narrowed it down to if it is the pci connectors on the motherboard, the mini 6 pin to 6/8 pins i was using. or a combination of both.

The card now properly shows in my system however it is only running at 2.5gt/s instead of 5.0gt/s like the GT120. I was under the impression that with the new nvidia web drivers these cards would automatically run at the PCIE2.0 speeds. Does anyone happen to know if this is because the card is not flashed or is it only the newer cards that automatically run at the 2.0 speeds?

Here is a picture of my current system information:

From the screen capture, it looks like your card is working now (both MSI and the ROM revision is back to normal). Or still only black screen?

That 2.5GT/s is cosmetic. If you want to know the real link speed, you can use CUDA-Z or openCL OceanWave. Both software can show you the benchmarked link speed, which should be around 5GT/s. (CUDA-Z is better for this purpose, OceanWave may occasionally shows 2.5GT/s because the link speed is actually dynamically adjusted. CUDA-Z can keep updating the result to avoid "taking data at the wrong time")

 

[Dr. Stealth]

I'm running two un-flashed 1080 TI's and get x16-2.5 GT/s also... In slot 1. But slot 4 gives x4-5.0 GT/s

I also have a GT-120 in slot 3 that runs at x4-5.0 GT/s

1080 TI Slot 1:
NVIDIA GeForce GTX 1080 Ti:
Name: NVDA,Display-F
Type: Display Controller
Driver Installed: Yes
MSI: Yes
Bus: PCI
Slot: Slot-1
Vendor ID: 0x10de
Device ID: 0x1b06
Subsystem Vendor ID: 0x3842
Subsystem ID: 0x0010
ROM Revision: VBIOS 86.02.39.00.90
Revision ID: 0x00a1
Link Width: x16
Link Speed: 2.5 GT/s

GT-120 Slot 3:
NVIDIA GeForce GT 120:
Name: NVDA,Display-B
Type: Display Controller
Driver Installed: Yes
MSI: Yes
Bus: PCI
Slot: Slot-3
Vendor ID: 0x10de
Device ID: 0x0640
Subsystem Vendor ID: 0x106b
Subsystem ID: 0x0010
ROM Revision: 3386
Revision ID: 0x00a1
Link Width: x4
Link Speed: 5.0 GT/s

1080 TI Slot 4:
NVIDIA GeForce GTX 1080 Ti:
Name: NVDA,Display-F
Type: Display Controller
Driver Installed: Yes
MSI: Yes
Bus: PCI
Slot: Slot-4
Vendor ID: 0x10de
Device ID: 0x1b06
Subsystem Vendor ID: 0x3842
Subsystem ID: 0x0010
ROM Revision: VBIOS 86.02.39.01.90
Revision ID: 0x00a1
Link Width: x4
Link Speed: 5.0 GT/s

 

[RA10P]

Hey thanks for the suggestion of using CUDA-z. i tried the waves one however just got a beachball. here is a picture of my current card im not sure what i am looking for but the device to device speed seems to be half of yours.

 

[h9826790]

Here

If 2.5GT/s, the number will be like this

 

[RA10P]

Its strange because my numbers in openCL ocean waves are quite a bit lower than yours also

 

[h9826790]

Its strange because my numbers in openCL ocean waves are quite a bit lower than yours also

That's why I recommend CUDA-Z. You may try OceanWave a few times, it may shows different result. My above OceanWave samples are all from the same Mac, same hardware, and just keep re-open OceanWave, then I can capture both 5GT/s and 2.5GT/s screen capture (CUDA-Z always report the correct number, so that I can't capture the 2.5GT/s screenshot)