What are your impressions of the D510MO? Do you have any fans in there and how are the temperatures?
I'm still commissioning this server, but so far I think that it's good value. There are complaints in some reviews that it doesn't make a good HTPC, but I suspect that's only the case if you want it to run HT video codec.
For my purposes, I only need it to be headless and serve the audio and video files (and NAS, and email, etc). So far my codecs are elsewhere (SqueezeBox and PS3). I don't need it to have any fancy video card, and two SAYA ports is sufficient for my needs.
I have left a Panaflo fan in the ATX PSU case, and I'm running it at 5V. A little noise, but it gets me a 2C drop. I'm not sure whether to leave it running, or disconnect it.
I'm still hooking up lm-sensors, and because the server isn't fully commissioned, I'm not running it 24x7 and only have one SATA drive in place. (There will be 2 SATA drives once commissioned.)
The last test I did, the CPU temperature reported in the BIOS was 35C and 47C for the remote. With the 5V fan running, 32C and 45C for the remote.
I'm thinking of hooking up a Panaflo as the rear case fan, and running it from the PWM controller on the motherboard. I'd use lm-sensors to kick start it if the system goes over a threshold temperature.
I've removed the giant fan from the top of the mini P180 case.