No problems booting, it's only when we try to do a DMA transfer that we run into problems.
2. Try moving the NI PCI 6025E card to different PCI slots on your motherboard. This will allow you to determine if the problem is local to a certain PCI slot on your motherboard.
We've tried it on 3 different Asus motherboards, in different slots; same problem.
3. Try another completely different type of PCI card in your motherboard, such as a network or sound card. This will help determine if the problem is causes specifically by the DAQ card, or is common to all PCI devices.
Again -- only happens when we do a DMA transfer to/from the card
4. Check the overall power consumption of your system and ensure that your power supply is meeting your needs. That 6600GT graphics card is pretty sweet, but its also a power hog. Check the recommended power supply for that graphics card, and if your running dual cards in SLI mode, I would recommmend at least a 400W power supply. The DAQ card is only going to draw around 5W of power, but it could be whats causing an already overtaxed power supply to crash your system.
Reproed with both NI-DAQmx 7.5 and 8.0
6. The last thing I would recommend is to flash the BIOS on the motherboard with the latest update from ASUS. Contact ASUS and get explicit directions for how to do this properly for your motherboard.