Hi,
Just installed a Sonnet Allegro USB3.9 PCI on my Mac Pro 2010 Lion.
Its on slot 4.0 as recommended.
System information says Slot 4 gives speed of 5GB/s.
However when I check USB 3.0 speed it is only "up to 480mb/s" which is exactly what I get for USB2.0.
So what is going on here?
USB 3.0 that works like USB 2.0?
Why bother with this Sonnet?
Any experienced comments will be sincerely appreciated
Thanks
Mac Pro, OS X Mountain Lion (10.8)
Maybe you didn't install the correct kext for 3.0 support, or the device you are using needs external power in order to perform at USB 3.0 speeds.
Did you connect the internal power to the card too?
What does this look like in your System Profiler?
(I have a different USB 3.0 card than you and don't have anything connected to it)
Hi and thanks for the info
I'm just connecting simple USB 3.0 Hard drives and card readers to this new Sonnet connection.
This is what my USB info says:
Hope you can see this
Thanks
Sorry,
this is the related USB report
This is the specific speed for the USB 3.0 drive connection revealing the speed is only 480mb/s.
When I connect my card reader to this USB 3.0 connection the blue light does gp on, but the report says up to 480mb/s for this one too.
I have a 1,1 with Lion and the Allergro USB3 PCIe... works fine. And I have Sonnet Tempo SSD in there also.
But you are not the first to say they had trouble with the Allegro.
What does Sonnet say when you asked?
On Sonnet's website in their FAQ is the question and answer:
 | Why is my USB 3.0 card reporting a USB 2.0 connection to a USB 3.0 storage device? | Jan-10-12 | |
| The card is actually making a USB 3.0 connection and it is just a reporting bug. | |||
Have you tried actually measuring the transfer speed to a connected USB 3.0 device using Activity Monitor?
I also have a Sonnet Tempo SSD on slot 3 which works fine.
Here I assume it might be a report bug and I will definately check the transfer speed of the USB 3.0 connection compared with my USD 2.0 inbuilt connections.
It is still an annoying bug, in addition to the fact that after installing the Allegro and downloading the driver from Sonnet, it only recognized one USB 3.) outlet and not the other (weird). Only after I hooked two hard drives to the USB connectors and reinstalled the driver, it also recognized both. So maybe this Allegro has many other bugs and was therefore discontinued.
Any idea what people use the PCI2 slot for? Can the Sonnet Allegro fit there?
The 3-4 slots are only x1 lane.
Thanks a lot for all the good suggestions
2010-2012: 4 PCIe 2.0 slots (one free PCIe 2.0 x16 slot )
2 PCIe 2.0 x4 slots
No Mac Pro had more than one 1x slot and that was the 2006 1,1 (16-1-4-8 was standard configuration)
2008: 2 PCIe 2.0 slots x 16x and 2 x 4x PCIe 1.1 slots
2009: 2 PCIe 2.1 slots @ 4x (oddly they share common bandwidth and are not fully independed which can affect SSD controllers)
sonnet Allegro usb 3.0 PCI
