Re: FreeBSD problem
You seem to have two devices using irq 11 (sound card + unknown card). That could be a problem.
Can you post the Nvidia sysctl information? (See the README that came with the driver for more on that.) Also, I think in FreeBSD irq handlers show up in ps -- can you see which ones are active when you're having latency problems? And, finally, could you also post a dmesg with another graphics driver loaded (not nvidia.ko)?