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 21 
 on: April 20, 2017, 05:46:59 AM 
Started by darthsian - Last post by lowrider
Update Pascal driver released tonight:

https://images.nvidia.com/mac/pkg/378/WebDriver-378.05.05.05f02.pkg

Fixes Metal.

Lou

 22 
 on: April 19, 2017, 11:55:29 PM 
Started by darthsian - Last post by nekton1
I think we need to ask FSP to resume production of the BoosterX5  Cheesy

 23 
 on: April 19, 2017, 05:20:28 PM 
Started by darthsian - Last post by Spacedust
There is still no report from anyone using normal CPU's. All of these Macs were upgraded to X5690's.

 24 
 on: April 19, 2017, 12:56:53 PM 
Started by darthsian - Last post by Fl0r!an
The SATA power lines shouldn't be an issue. Not sure what Apple has used in the cMP, but SATA power wires are usually around 0.5mm^2 or 0.75mm^2, which is sufficient for 12A resp. 15A (144 ... 180W @12V).

Attaching a single PCIE 6pin to such a line (using two SATA connectors) should be perfectly fine even with additional SATA devices. The remaining 8pin can be connected by using the two onboard 6pin PCIE connectors.

 25 
 on: April 19, 2017, 09:07:14 AM 
Started by darthsian - Last post by Squishy Tia
Using 2x SATA->6pin PCIE and 2x Mini-6pin -> 8pin PCIE should be save even for most powerful GPUs. If I recall correctly, a single SATA connector is supposed to provide up to ~50W.

That might be somewhat OK for separate SATA connectors, but Apple's are two connectors on a single line, meaning the full current draw for both would come from the same line. And since PCIe 6-pin connectors are meant for 75w, not 50w, that's an additional 50w over the 100w the lines are designed for. At full load that'd be like pulling a Polaris 480 before it got the PCIe current limit fix through the lines. The PSU itself can handle it. Probably not two of these GPUs, but at least one easily. It's the lines themselves I'd be worried about. The GPU will draw whatever it draws - it's rated for that. I wouldn't want any optical drive (or anything at all really) on the same SATA line as the one I'm using to power the GPU. I sure as hell wouldn't want that kind of power surge going through the same line as any other equipment.

I guess we'll find out soon enough from Rommy whether or not it's stable for long term use.

 26 
 on: April 19, 2017, 08:02:37 AM 
Started by darthsian - Last post by Fl0r!an
Using 2x SATA->6pin PCIE and 2x Mini-6pin -> 8pin PCIE should be save even for most powerful GPUs. If I recall correctly, a single SATA connector is supposed to provide up to ~50W.

 27 
 on: April 19, 2017, 04:53:50 AM 
Started by darthsian - Last post by Squishy Tia
I've ordered some SATA to PCIE cables, I'll see what happens.

Pixlas mod me be best answer for long term

Need to get more feedback from others with Pascal Titan cards

dp

The problem isn't the mod itself, but the level of skill needed to perform the mod. Even using the clamps the mod goes well beyond the vast majority of users' capabilities, and given peoples' tendancy to fudge even step by step instructions combined with Apple having used ALL BLACK wiring, I'd be hesitant, to say the least, to advise the average Joe to mod a PSU, especially when they aren't being made anymore. Whatever stock Apple has left in GSX is it - once they're gone, they're gone.

It would be nice if new units of 5.25" bay external PSUs were easy to find for the Mac Pro crowd. I'd be kind of unnerved by upwards of 150 watts travelling through SATA wiring, but especially those tiny pins.

Those Mac Pro PSUs would be a lot more replaceable if Apple hadn't embedded the SATA data+power backplane into the PSU's lines. Unless of course each of those backplanes' power segment is connected via a PCIe type connector like on a modular PC PSU, in which case you'd have instant access to virtually any PSU on the market so long as it's modular.

 28 
 on: April 18, 2017, 07:31:32 PM 
Started by darthsian - Last post by Rominator
I've ordered some SATA to PCIE cables, I'll see what happens.

Pixlas mod me be best answer for long term

Need to get more feedback from others with Pascal Titan cards

dp

 29 
 on: April 18, 2017, 09:55:40 AM 
Started by darthsian - Last post by eVasilis
Is an external psu out of the question?

 30 
 on: April 18, 2017, 07:19:21 AM 
Started by darthsian - Last post by nekton1
If new Pascal cards in old cMP 4,1 and 5,1 units is going to be a trend until 2019, this PSU issue is going to need sorting.

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