two HVR1600s; no worky...

[cameramonkey]

I had my system running smoothing for several weeks. I am running the system as a dedicated HTPC running XP, and connecting it to my other TV via a HD100 box.

I just added a nearly identical second HVR1600 to the computer so that I could watch one tuner while recording or record two shows at the same time.

By nearly identical, I mean the first card was a retail HVR1600 with the IR blaster and remote control. the second is a whitebox unit, sans remote/blaster and has an FM tuner instead.

I powered up the PC and it saw the hardware flawlessly. when I went into the setup to add the second tuners, it reacts VERY sluggishly in trying to search out the channels. and by slow I mean it takes about 10-20 seconds per channel, and doesnt detect any signals, either OTA HD or cable. I THINK the first card still sees signals and runs OK (by the time I quit last nite I was VERY tired).

Any ideas? should I return the second HVR and install another brand tuner? could the two identical tuners be causing an issue?

I am pretty sure it's not a performance problem, as the system is VERY robust... AMD 6400+ x2, 2GB RAM, etc.