Noise from Xfinity cable box

I just installed an Xfinity X1 cable box in my rack with my audio and video gear and it is the noisiest piece I have ever had in my system. I think it is a fan, but it runs constantly, even with the power switched off (standby mode?). I had been using a simple little digital converter from Comcast in the system that worked fine for HD video and audio, and was dead quite.  I am thinking of going back to it and ditching the DVR and voice capabilities.  Anybody else have this problem with new X1 cable boxes?