I've used ff400 about 1 year Win 7 64 bit. Without problem. Normally I'm using it with cubase for recording almost everyday.

Yesterday(and today) I listened 8 hours music (with Winamp, thru the samson C-control and Behringer B2030A) and ff400 driver drop out occasionally. Before that the sound become distorted and then the driver is missing. Everything else working fine. When I shut down my PC and wait a minute and reboot it, everything is fine again. I'm listening three more hours and the same thing happens again. So I did  the "cold reboot" again and everything works fine. And today the same problem continued. Any ideas, where is the trouble and how can I fixed it?

I change ffcable today, but same broblem occur again.

I have the latest driver 3062, and i've tried 3047 and  3059 too. It doesn't help. Firmware is 1.70.

My DAW:
Win7 64bit - asusP8P67Deluxe - i7-2600 3.4G - 16Gb CorsairDDR3-2000 - NexusPSU 850W - Siig FFcard with TIchip - RME FF400 - Cubase5