Looks like I will get the adapter and heat sink today, but Amazon screwed up the order for the SSD. Will advise ASAP
Fascinating. Is your testing destructive to the subject nMP?1) This is the first Apple computer that has an entirely 1st party chain of custody. It doesn't leak the same as a product made at a production plant out of Shenzhen or Guangdong. The leak has to come from inside Apple. I expect the service manual will show up when the machine is older. Check again in a couple of years.
2) In the same vein as the previous answer, I can find schematics for nearly every other Apple computer. And I can also find schematics for most iPhone models. But not Mac Pro 2013. Quite infuriating. It isn't a locked-down device it is supposed to be a computer that puts control back in the user's hands. I fully upgraded my Mac Pro 2013 in the Apple store when I bought it in December 2013. And for all that money I can't get minimum documentation of the pinout for the graphics board flex cable.
3) Let me clarify the 'how electricity works' bit. The metal housing of the Mac Pro 2013, including the external cover, act as both a heat sink and as 'ground.' I don't think any portion of the solid metal housing is used for transferring active power it is exclusive for grounding purposes. The extra electrical charge that has left the circuits and is floating in the metal housing is pulled toward earth ground, the third prong in your AC outlet. Without proper grounding, the extra charge will continue to flow around the housing like a faraday cage building up more charge and eventually will arc and discharge as static electricity, either outside or back into a circuit inside the housing. In the case of internal static discharge, it will continue to damage the computer until a board frys, or you switch to an outlet with proper grounding. I recommend always connecting the Mac Pro 2013 through a UPS, since most of them check for failure to ground and will refuse to operate until the ground fault is fixed.
Legacy PC-esque towers also have large metal plates inside the casing and usually, the slide-open access door is also made of metal. It is easy enough to sprawl out all the components of a disassembled Mac Pro 2013 removed from its original metal housing and insert those components into a legacy tower with all components mounted to at least be touching one of metal walls of the casing. The stray charge will get pulled toward the outlet and drained to earth ground.
How NOT to re-build your Mac Pro 2013 after removing it from the case
http://www.instructables.com/id/Standing-PC-Case/
Picture of unpopulated metal tower (hint: all metal; made to be well grounded aka anti-static)
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Picture of a populated metal tower (hint: all metal; all installed components have at least one bare metal surface in contact with the bare metal of the housing.
View attachment 734940
Bypassing the "don't turn on your computer when the lid is off" is pretty simple. It is also easy to re-ground all of the components after removing them from the original casing. Those are baby steps.
Compare that to the effort and time required for using a razor blade to gently scrape off the top and bottom layer trace coating of both working graphics cards without destroying them. To create a separate ~300-pin breakout board for the two flex cables. The time just to build one ~300 pin breakout board by hand is a whole day, ~8 hours straight for a build of high enough quality that the Mac Pro 2013 still works in pass-thru. Then buy and use several expensive logic probes fast enough to handle the full bandwidth of PCIe 2.0.
Anyone have a Mac Pro 2013 they want to donate? Even if it is trashed and doesn't work, I can still use it to figure this out. At a minimum, I would need an extra left graphics card, an extra right graphics card, and two extra graphics board flex cables. I have a lower-end logic probe and a few oscilloscopes; I can make due with that for now combined with my own Mac Pro 2013 once I have those extra parts.
Fascinating. Is your testing destructive to the subject nMP?
In other words, you'll turn it into a Hackintosh.Once I have the schematics/layout I can start testing a direct x16 connection between the CPU and a newer GPU such as a Vega.
In other words, you'll turn it into a Hackintosh.
Wouldn't buying/building a Hackintosh be much simpler, cheaper, and more reliable?
I would open the debate by saying that if you add a modern GPU (red or green) - it's no longer an nMP, it's a Hackintosh.I am open to debate how swapping out one heatsink for another changes the computer from a Mac to a Hackintosh.
I would open the debate by saying that if you add a modern GPU (red or green) - it's no longer an nMP, it's a Hackintosh.
You're assuming that the nMP's bastard EFI BIOS will even recognize something other than the anemic ATI cards (D300/D500/D700).
...and keeping the MP6,1 BIOS from injecting D300 firmware into a Vega.will depend on out of the box support for a card such as Vega when wired in
I wish there was a way to aggregate 2 TB2 busses for eGPU use
...and keeping the MP6,1 BIOS from injecting D300 firmware into a Vega.
@CodeJingle I admire your effort dissecting the nMP to connect PCIe GPUs. Outside of Apple, I don't think anyone has undertaken this task yet. Would love to see how this turns out.
Is plugging in two eGPU currently not supported? Has anyone tried it?
Other than some research I haven't started yet. I just blew $1200+ on the 2 TB hard drive upgrade, which in itself is a kind of pre-cursor test leading up to the GPU stuff. I need to save up to buy an extra pair of left/right GPUs to destroy in the process of creating a schematic to understand better the 300 pin connector going to each card. I've found schematics for nearly every Mac ever made except the Mac Pro 2013, and it continues to enrage me because the schematic always has diagrams for every set of pinouts and it would save me a lot of time and money. I plan to remove the trash can enclosure after getting either the schematic or an extra pair of left/right cards. The way things are going I would say Q1 2018.
That’s my understanding as well. What I wondered was if there was a way to sync 2 TB busses to get TB3 bandwidth (less some overhead). I think not, and I imagine signaling would take up a lot.From my experience, it's one eGPU per Thunderbolt controller. The nMP has three TBT controllers and can handle upto 3 eGPUs. RX Vega drivers are getting better now that iMac Pro launch is near.
View attachment 735319
I plan to remove the trash can enclosure after getting either the schematic or an extra pair of left/right cards. The way things are going I would say Q1 2018.
There are D500 GPUs on Ebay right now, which is a fairly rare event. But the prices will give you a heart attack.
Two questions about this....The OS, even pre-boot, is going to know it isn't a D300/D500/D700. If the cards work then in the worst case, an OS/bootloader update that would normally also update the firmware on the graphics cards skips that step.
I too couldn't find posts i had in mind, but think that this will do for now.I can't find any confirmation or rebuttal of this today, however.
http://forum.netkas.org/index.php/topic,11517.0.htmlbecause Apple included EFI & BIOS rom of all possible nMP GPUs in the nMP boot rom
it was mentioned that there's no NVRAM on the Dx00 GPUs - it was said that the BIOS loads the firmware onto the card at each boot
whether the BIOS/bootloader ignores the failure of the Dx00 firmware update - or whether it's considered to be a fatal error that halts the system
You've tested this with a Vega or Pascal in an MP6,1?As long as the graphics card runs fine with its current firmware, a graphics card not wanting to accept a firmware or firmware update doesn't cause the Mac Pro 2013 to hang.
I'm skeptical because I've dealt with many cases of the BIOS rejecting devices simply because they aren't on the "white list" of supported devices.
You've tested this with a Vega or Pascal in an MP6,1?
For example, I've seen it mentioned here that the MP6,1 won't boot if the 2nd "compute" GPU is missing.
Back in one of the flame wars about "there will be upgrade GPUs for the MP6,1 because of the screws", I believe that it was mentioned that there's no NVRAM on the Dx00 GPUs - it was said that the BIOS loads the firmware onto the card at each boot. I can't find any confirmation or rebuttal of this today, however.
A Project like thiswould be bad for the warrenty.
I saw a performance benmark between a cooled and non cooled Samsung 951 and the performance difference was pretty big. The cooled one had stellar performance ... the non cooled permance went up and down in spikes.
My biggest fear, when the SSD in my nMP failes, prices wil be astronomical.
They are already now ... if you find new on ebay or whatever.
4 TB NVMe will be available soon. It is an option on the iMac Pro so we can assume Samsung will announce availability in the next few months. I expect it will cost ~$2k. You can get 4 TB now from MacSales but it isn't using the latest technology it is slow and they charge too much for it.2 TB was not enough.