Let me provide some assistance for this issue.
Have you tried to disable some of the onboard options for your system? This would help us rule out any possible conflict or resource limitation of the board.
I would usually disable unused onboard Option ROM such as onboard RAID, onboard NIC, Serial ports, onboard video (if using a discrete card), etc.
Would it be possible to move the card to a different slot to compare results? I would also considering testing other cards on the same system to see if the issue follows the PCI Express* slots of the board.
I've disabled all on board devices, even those I normally use, that the BIOS will allow. Except the SATA controller from which my OS runs (it's not in RAID mode), and the PCIe slot where my graphics card resides. But with no success. The rs3wc080 is always ok both in the mobo BIOS and it's own BIOS. Noe errors or conflicts ever reported. But once I get in to Windows the card won't start. As I mentioned before it used to start, but was unstable. For the last 100 reboots it consistently will not start. Ever.
I have tested the same card in three different computers. A Z820 work station, a PC with Asus Rampage mobo, and in my old PC running some older x48 chipset mobo. It works just fine in all of these, leaving me to think that the P9x79 mobo of my original machine is to blame. But I've also tested several other PCIe cards on this mobo with no error. This includes two different HP controller cards. Never any issues. So they both work fine, except when they are together. Bad marriage...
Could there be some kind of special setting that this particular card needs? Or is there a general compatibility issue between this model of cards with this model of mobos (or chipset)?
Both have the latest firmware. I've thought about downgrading one or both to even older firmware, but I can't really see much hope in that.
I was wondering if you have tried to reverse the installation of the cards. In other words, to install the RAID controller to the top slot (closest to the processor) and then install your video card to the second x16 slot. I am trying to see if this would make any difference on how the board would allocate resources.
That's probably the only slot I didn't test earlier, but after your post I did. Works fine in bios, but in Windows it's still giving error 10. Not matter which slot, which PCIe generation I set it to, and no matter what I disable of onboard devices. Currently only SATA and two PCIe slots are active in the mobo bios. One for graphics and one for the raid controller. I even tried different graphic cards and hard drives to rule out some freakish compatibility issue. No luck.
Everything else I throw at it, like other raid controllers, more graphic cards, FireWire cards etc, works fine in any port under any load. And the raid controller works fine in any other computer I've tried except the one I need to use. So I guess it comes down to this; the P9X79 mobo is incompatible with RS3WC080. At least that seems to be the case with my specific samples of the two.
I have exactly the same problem.
Brand new Gigabyte GA-H97-HD3 motherboard, I7, 16 GB ram and latest version of Win 7.
Raid card loads and can configure disks.
Raid is seen in Bios.
Boot up Win 7 and I can see the Raid card, I can install the driver but get error 10, cannot start hardware error.
All peripherals that I can have been turned off, raid swapped between the two PCI-E slots, everything upgraded that I can (RAID card bios upgrade is still being worked on) but nothing seems to be working in getting this card operational.