dludingt

On 12/14/2015 at 10:54 AM, atheotsky said:

hi @dludingt , could you tell me what card are you using ? from what i can see, that card only draw power from PCIe slot and according to this post , i think 120W is ok for this case.

 

 

 

 

I was using the EVGA GTX 750Ti card, which drew power from the PCIe slot. I too had the 120W power supply and everything sounded like it would work. But I would get random kernel panics 3-4 times a day for no apparent reason. The only explanation I could think of is that the card was not getting enough power at those points and would cause the Mac to think there was no GPU.

So, I returned the GTX750Ti, purchased the Dell power supply and a EVGA GTX 950 card, made the appropriate mods to the PSU cable and have been running 100% stable. And the beauty of that solution was that it only cost ~$75 more than the 750Ti w/no PSU solution. And I have a much more powerful card to boot!

1 hour ago, atheotsky said:

i have MSI GTX 750 Ti and i often get kernel panic with Mac after 30 mins to 1 hour of use. this is my setup :

Akitio Thunder2

MSI GTX 750 Ti link
12V 10A power Brick link

MacBook Air mid 2013 with intel Core i7 and 8GB of RAM

OSX 10.11.1 and 10.11.2

is this a popular issue ? how can i prevent it ? will it be stable if i use it with Windows 8.1 ?

If you have this setup, the 12oW power brick still won't provide enough power to the 750Ti, which will crash under even modest use. I had the same setup and had to replace the card. Unless the MSI version has a 6pin power adapter, the GPU card won't be able to draw enough power directly from the PCIe slot and will kernel panic.

What about underclocking the card? I really, really don't want to get a larger PSU or a card that requires too much modding of the Akitio enclosure. All I am really using the eGPU for is so I can run dual monitors on an old 2011 15" MBP.

So I returned the 750 Ti and ordered a DA-2 power supply and one of the new EVGA GTX 950 SC cards for not that much more. Just modded the power supply and got it up and running. Works perfectly with no issues for the past hour. No random hang ups.

Someone should probably write up a warning against using the EVGA 750 Ti straight out of the PCIe slot in the Akitio.

Thanks again Goalque for writing the script and making this whole process insanely easy.

@anilpani also reported earlier that EVGA GTX 750 Ti does not work properly with the AKiTiO for some reason. I own a Gigabyte model with a 6-pin power connector and it was stable with the ATX PSU, so maybe it’s due to the fact that your model counts on only the slot power (electrically x4). The standard is 75W and AKiTiO can handle that:

[Thunder2 PCIe Box] What's the maximum power output through the PCIe slot? | AKiTiO

but GTX 750Ti’s power peaks may exceed 75W without the 6-pin and result in instability. This is my best guess.

What about underclocking the card? I really, really don't want to get a larger PSU or a card that requires too much modding of the Akitio enclosure. All I am really using the eGPU for is so I can run dual monitors on an old 2011 15" MBP.

So, is the GTX 750 Ti card worth keeping? I'm thinking of returning it, but can't think of a comparable option in that price range that won't take an ATX power supply. Unless I go the Dell DA-2 PSU route. But I don't want to spend a lot more money and the card needs to fit inside of the Akitio box.

Not a script issue. We’ve seen instability with that GPU (here, here and here).

I have an early 2011 MBP 15" running an Aikito -> EVGA GTX 750 Ti that is experiencing frequent Kernel panics. I have an upgraded 120W power supply for the Akitio box, so I don't think the issue at hand is hardware based.

I'm using the 346.03.03f02 driver that was automatically downloaded using the 0.9.6 version of the script. Anyone have an idea as to why my system continues to crash about every 1-2 hours?

Here is my Kernel Panic report:

*** Panic Report ***

panic(cpu 6 caller 0xffffff7fa9181b50): NVRM[0/193:0:0]: Read Error 0x00000200: CFG 0xffffffff 0x138010de 0x40100100, BAR0 0xb1000000 0xffffff92408b7000 0x117000a2, D0, P1/2

Backtrace (CPU 6), Frame : Return Address

0xffffff820edfbad0 : 0xffffff80256e5307

0xffffff820edfbb50 : 0xffffff7fa9181b50

0xffffff820edfbc10 : 0xffffff7fa925d553

0xffffff820edfbc70 : 0xffffff7fa950aaa3

0xffffff820edfbd00 : 0xffffff7fa9533941

0xffffff820edfbd40 : 0xffffff7fa93387b2

0xffffff820edfbd60 : 0xffffff7fa9338c20

0xffffff820edfbdb0 : 0xffffff7fa9508793

0xffffff820edfbe20 : 0xffffff7fa928a083

0xffffff820edfbe40 : 0xffffff7fa918818d

0xffffff820edfbef0 : 0xffffff8025cb7536

0xffffff820edfbf40 : 0xffffff8025cb53a1

0xffffff820edfbf80 : 0xffffff8025cb5496

0xffffff820edfbfb0 : 0xffffff80257d15d7

Kernel Extensions in backtrace:

com.nvidia.web.NVDAResmanWeb(10.0.7)[53A7D683-CD5C-3EDD-A58E-5BB7FF28BDE9]@0xffffff7fa911d000->0xffffff7fa93f2fff

dependency: com.apple.iokit.IOPCIFamily(2.9)[8E5F549E-0055-3C0E-93F8-E872A048E31B]@0xffffff7fa5f49000

dependency: com.apple.iokit.IONDRVSupport(2.4.1)[814A7F4B-03EF-384A-B205-9840F0594421]@0xffffff7fa6b4d000

dependency: com.apple.iokit.IOGraphicsFamily(2.4.1)[48AC8EA9-BD3C-3FDC-908D-09850215AA32]@0xffffff7fa6024000

dependency: com.apple.AppleGraphicsDeviceControl(3.11.33b1)[2BA0BB49-9DFD-3851-984F-8816AE3A1964]@0xffffff7fa817d000

com.nvidia.web.NVDAGM100HalWeb(10.0.7)[1C1114D7-6B7D-370C-BDDC-DBFA42222D6A]@0xffffff7fa93f3000->0xffffff7fa95effff

dependency: com.nvidia.web.NVDAResmanWeb(10.0.7)[53A7D683-CD5C-3EDD-A58E-5BB7FF28BDE9]@0xffffff7fa911d000

dependency: com.apple.iokit.IOPCIFamily(2.9)[8E5F549E-0055-3C0E-93F8-E872A048E31B]@0xffffff7fa5f49000

BSD process name corresponding to current thread: kernel_task

Boot args: nvda_drv=1

Mac OS version:

15B42

Kernel version:

Darwin Kernel Version 15.0.0: Sat Sep 19 15:53:46 PDT 2015; root:xnu-3247.10.11~1/RELEASE_X86_64

Kernel UUID: AB5FC1B4-12E7-311E-8E6F-9023985D8C1D

Kernel slide: 0x0000000025400000

Kernel text base: 0xffffff8025600000

__HIB text base: 0xffffff8025500000

System model name: MacBookPro8,2 (Mac-94245A3940C91C80)

That's correct. The card is an EVGA Geforce GTX 750Ti SC with TDP of 60W.

I just set up the same exact hardware config and am also experiencing the same issues. Both with the stock power supply and a 120W power adapter (12V, 10A).

I'm also using the EVGA GTX 750 Ti card that is supposed to draw power directly from the PCIe slot.

My guess is it has something to do with the driver, as more than one of us are experiencing the same issues. I can dig up any of my Kernel Panic dumps if that would help.