On Thu, Dec 15, 2016 at 02:04:04PM -0800, OpenBSD lists wrote: > I recently replaced a pair of Soekris 6501's (BIOSes on both went blank) > with some SuperMicro X11SBA-LN4F-O boards, SATA-DOM-064s, the CSE505-203B > and 4 GB 1600 Mhz DRR3 sticks. > > Draws so little power that it looks like the Power Supply is wasting more in > the AC-DC conversion process than the system itself is using. Considering > replacing it with a 60w 12v power adapter like some of the other systems > use. > > Memory latency is very low and very consistent since the CPU cores and the > memory run at the same frequency. > > I was considering the A1SAi-2550F, but these were cheaper, lower power, had > a shorter time to ship, and don't have the Intel Management Engine in them. > > Only problem is that most of the sensors don't seem to be supported: > > # sysctl hw.sensors > hw.sensors.cpu0.temp0=39.00 degC > hw.sensors.acpitz0.temp0=26.80 degC (zone temperature)
I also have three X11SBA-LN4F and two X11SBA-F boards. They also have the benefit of using mSATA SSDs which most of the Atom C2X5X boards (except for A1SRM-LN5F/LN7F) do not. They can also run direct from DC. One of my projects for the new year is get these up and running but I did notice the same with sensors. Prior to shortly before 6.0, xhci(4) would fail (I forget the message) and the machine was unusable for OpenBSD. Now that xhci(4) has been fixed, it works fine. I asked Supermicro about the 12V voltage range and they said 12V +/- 10% on A1SAi/A1SRi and 12V +/- 5% on the X11SBA. I was originally planning on hooking these direct to batteries but decided to use a DC-DC power supply from mini-box.com which allows hooking to 12V or 24V battery banks without being worried about voltage changes. I put this in the CSE-505-203B case in place of the original power supply. One of my goals is to run performance tests between the A1SAi/A1SRi boards and the X11SBA. Bryan
