Eric Santiago
Well-known member
Can you elaborate on 'the hardware isn't as robust...
The Sonnet is built like a rock. The Magma felt like a....PC.
But Magmas 3 cards and the 8X is worth it.
Both are great though in their own way.
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Can you elaborate on 'the hardware isn't as robust...
GPUs not working with the Sonnet expansion boxes is not specific to Sonnet or any Tbolt manufacturer for that matter .... most modern PCIe GPUs are x 16 lane PCIe cards with very high speed I/O to the MB and CPU .... Tbolt by definition is only x 8 lanes maximum ... so though you can get 10GBs I/O speed on the Tbolt bus you don't have enough PCIe lanes to carry the tremendous amount of data that modern GPUs typically process.
Believe me, I've tried every which way to get our Sonnet Tbolt expansion boxes to work with nVIDIA GPUS ... but no luck (if anyone cracks the code - please let us all know) ... Tbolt will not even see a x 16 lane GPU.
Also, the bandwidth requirements for CUDA based image processing are incredibly high ... in one of our Mac Resolve Systems I'm using three EVGA GTX 690 cards (i.e., six GTX 680 cards) to push Resolve to the limits .... only the PCIe bus can handle that data throughput.
The Sonnet Tbolt expansion boxes are terrific for adding RedRocket, Fiber Channel, 10GigE and eSATA cards but alas not GPUs .... still a Retina Display MBP with a couple of Sonnet Tbolt boxes attached is a beast of a machine .... now if there was just someway to snuck a couple of EVGA 690s in there somehow, we'd be happy as Larry.
Will be interesting to see how Apple incorporates Tbolt and USB 3 as well as PCIe 3 into next year's Mac Pro Tower upgrade.
Cheers,
Neil
Anybody could clarify or explain the situation with the "4x warning"?
I have the same thing as a lot of users here, on RCX, the RR in the Magma shows up at 4x but it's listed at 8x in the system info.
So, how does it actually run? 4x? 8x?
Thunderbolt only operates at 4x. Even though the card is physically in an 8x slot, the maximum throughput via the thunderbolt cable you're going to get is only 4x. Hence the 4x warning in REDCINE-X.
If I understand well, whose saying in that thread that their Rockets inside the Magma works or worked at 8x are wrong?
Thanks a lot for all these infos Grant.It definitely shows up to the OS as an 8x card slot, but you're not going to get that kind of bandwidth from a Thunderbolt enclosure.
Theoretically, the thunderbolt cables could handle 8x, but not in its current implementation. Half of the lanes in the thunderbolt cable are dedicated to DisplayPort for video output. That's what allows you to daisy-chain a monitor inline with other Thunderbolt devices to a single port on your computer, and what prevents you from utilizing the full bandwidth capability of the cable when connecting to a single device.
I started out with a Preproduction one from Magma.
Only one bug and it was fixed quick and its been woking good.
Till just a week or so ago.
I ran in to a problem.
RR not showing up on any Thunderbolt device with Magma 3T.
Tried all kinds of things to get it to work. Been working with Magma and they been a big help going above and beyond.
Magma tells me theres a lot of people having the same problem I am having.
The card will show up in a pc tower and work.
Just not in a 3T by thunderbolt hooked up to a new up date MBPR or a not updated MBP17.
I send in the 3T to magma and there RR works in it. They send me a new one and still does not show up.
Need to test it in a Mac pro tower. But if it works in a PC tower windows it should work in a mac or the 3T.
If any one is having the same problems post them up and let me and every one know what worked to fix the problem.
This definitely sounds like another Apple OS issue...
:sifone: Peter