SDXC Cards and USB Drop outs on MP Question??

Not sure if any of you have experienced this or have any insight..

I have a MP mid 2010 8-core with 32GB RAM, Sonnet USB 3.0 PCI, ESATA PCI & Intensity Pro PCI / Running latest lion 10.7.4

I have had issues lately with my USB ports (Front USB specifically)..

1. My USB MAC keyboard drops out about 3-4 times daily, I have to unplug it and plug it back in regularly, and sometimes plugging it back into the same port doesn't work.

2. Not all the time, but consistently enough 2 of my USB card readers (Moshi & Trancend) give me failures (stop / eject themselves) and corrupt my batches of footage (5D Mov's) when copying from high speed SDXC Lexar SD cards. However my firewire CF reader never fails.

3. My sonnet USB 3.0 PCI hangs with any SD Card reader including the recommended sonnet CF/SD reader. It is installed in the recommended PCI bay as per manual.

I Have 2 Firewire Powered drives always connected, and 3 internal 7200rpm drives & 240GB OZC 6G SSD running the OS. This is really becoming an issue as I am loosing data and dont know what this could be, someone on apple discussions said I'd need a powered USB hub to resolve my issue, and also stated that my keyboard is drag on the USB power supply. My SDXC cards have the biggest issues, I have noticed other SD cards copy over fine so far..
Any thoughts?

Thanks

Have you tried installing the Sonnet card and seeing how that effects your performance?

grailz wrote: Have you tried installing the Sonnet card and seeing how that effects your performance?

You mean uninstall? Yeah I think I'll start with that as I can remember having issues before that was installed. And it is hit and miss with recognizing USB devices..

desilva_oz wrote:

grailz wrote: Have you tried installing the Sonnet card and seeing how that effects your performance?

You mean uninstall? Yeah I think I'll start with that as I can remember having issues before that was installed. And it is hit and miss with recognizing USB devices..

It looks like your latest driver for that Sonnet card is dated Aug 30, 2011. Do you have the latest driver?

But if you had issues before you ever installed that Sonnet card, maybe it's not your problem.

Difficult problem to diagnose based on your various comments. Is there a point in time when you recall your USB ports working properly? Sounds like firewire is OK for you. You have a lot of PCI cards installed and the one of concern to me is the USB 3.0 card. Perhaps this is a conflict with the USB 2.0 bus. Your Mac Pro should not have any problems with a USB keyboard being a drag on the supply, but the potential conflict with USB 2.0 and 3.0 is still something I'd research a bit more.

You mention the front USB specifically, but don't rule out the rear USB ports entirely. Do any of the USB connectors seem to fit loosely when you plug into them?

Maybe with some more specific detail we can be of more help.