First post, by LightStruk
I have a Neoware CA10 client with what I believe to be the same Low Volume problem with PCI sound cards that others have seen on the HP T5720 thin client. With both an Audigy 2 and two different AW744L's, I get very noisy sound out of the Line Out jacks. (There was a blessed few minutes of clear, noise-free sound from one of the AW744L cards that I have not been able to replicate.)
The riser card is different in my Neoware CA10. It looks like this:
At the top of the board, there are unpopulated spots for two electrolytic capacitors, four SMD resistors, a diode, an inductor [?], and some kind of surface mounted integrated circuit with 8 pins (U1). I have no idea what to use for the discretes, and there's no documentation I can find on what IC would go in U1. I also do not know if all of these need to be populated to solve my sound problems.
What confuses me the most is that I have tried running the sound cards vertically, installed directly into the PCI slot without the riser card, and the noise problem remains. Would the electrical design of the PCI bus on this motherboard expect the riser card?