I'll make this short and sweet:
I record my gameplay to my shitty HDD, at around 42 MB/s, which can record most footage in 720p at the native 29.97 FPS.
I record my facecam to an external USB HD, with USB 2.0, at around 22 MB/s in 480 at the native 29.97 FPS. (USB 2.0 has a standard write speed of around 22 MB/s)
With this atmosphere I do not bottleneck at my HDD trying to record two separate streams.
And by the way for those who do not know, MB stands for MegaBit, not MegaByte.
I record my gameplay to my shitty HDD, at around 42 MB/s, which can record most footage in 720p at the native 29.97 FPS.
I record my facecam to an external USB HD, with USB 2.0, at around 22 MB/s in 480 at the native 29.97 FPS. (USB 2.0 has a standard write speed of around 22 MB/s)
With this atmosphere I do not bottleneck at my HDD trying to record two separate streams.
And by the way for those who do not know, MB stands for MegaBit, not MegaByte.