Hardware for 1Gbps NAT and 100Mbps VPN
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I've had one of them running for about 1 month in a pretty warm rack, according to pfSense dashboard the CPU was at 70 Celsius when idle. It had absolutely no problems at all.
It's been relocated to some cooler place, now it's at 50 degrees. -
Keep in mind that few, if any, motherboard temperature sensors are calibrated to. You could have two sensors sitting side by side on the motherboard and one might be as much as 10C different from the others.
Motherboard / CPU sensors are great for measuring change in temperature (i.e. is it hotter or colder then yesterday), but not so much for absolute temperature values.
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Thanks for your input!
@robi: Just to be sure, your system is fanless?The only time I had a system with heat problems was a Dell D630 with a totally dusted fan. We tried to install Windows 7 on a new SSD in this system. We noticed that it got very very hot but it never hung, it just throttled the CPU to 100 MHz and was really slow. :)
So I guess that the Atom must have a similar mechanism in place and should not segfault if it gets too hot? Also the mainboard has an "Overheat" LED which did not light up (but I know it works because it blinks when I pull the fan power connector).
@tgharold: Shouldn't the system at least be able to detect if it's too hot and have the sensors calibrated for that?
I'm running a memory test at the moment, so far no problems with the fan on. I'll try without the fan after it completes.
I should also be able to rule out the power supply, unless ist the Pico PSU that benefits a litte from the fan put on the CPU. -
Yes it is. It's currently in a temporary case, but it's soon going to be moved into a SuperMicro rackmount chassis, and I plan to add 2 extra PWM fans at the back of that.
Why are you using pico PSU? The A1SRi-2758F is can be powered with 12V directly. On my second machine, I just dropped the psu from the case because of this. The motherboard has power outs for disks.
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Yes it is. It's currently in a temporary case, but it's soon going to be moved into a SuperMicro rackmount chassis, and I plan to add 2 extra PWM fans at the back of that.
Why are you using pico PSU? The A1SRi-2758F is can be powered with 12V directly. On my second machine, I just dropped the psu from the case because of this. The motherboard has power outs for disks.
Thanks! I'll try to get the board exchanged then. I think I can rule out memory because MemTest86 does not show any errors when the board is hot. Strange enough it has no problems booting from USB and running the test when at the same temperature both pfSense and Linux segfault nearly everything.
As for the PSU, what cables are you using for that? When I ordered the parts, I looked into a 12v DC cable and also HDD power out cable. At least for system power I did not find any solution other than soldering myself.
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MemTest86 usually only catches fully-failed RAM issues. If you really want to check your CPU/cache/RAM/timings, then run Prime95 in torture-test mode (available at mersenne.org) for 12-48 hours. It stresses the CPU and cache and timings and RAM, which is more likely to catch subtle issues like RAM that does not live up to the timings listed on the package.
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Thanks! If the new board shows the same problems as the current one, I'll look into Prime95. Should arrive tomorrow…
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As for the PSU, what cables are you using for that? When I ordered the parts, I looked into a 12v DC cable and also HDD power out cable. At least for system power I did not find any solution other than soldering myself.
I didn't really look for original SuperMicro cables, just took a 4-pin 12VDC molex extender and cut the female end, and soldered it to the DC input jack on the chassis. I'm using a 3rd party case which has an external, laptop-style 12V DC power supply, so that's all I had to do.
The case originally had a built-in 12V->ATX psu, which I simply removed.Maybe your board had no problems. Bad quality power supplies can cause problems like you described, that's why I opted to the motherboard's built-in power source.
My other system is in an original SuperMicro rackmount chassis now, that has a normal ATX power source built-in. Look in the motherboard's optional accessories list.
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Thanks for your great input. If the new mainboard shows the same symptoms, I'll try with a normal PSU first to rule out power problems. And I'll just solder a P4 - 12v DC cable. Might save some power as the PicoPSU isn't the coolest part either.
The strange thing is that my supplier accidentially sent the wrong board (A1SAi-2550F) a month ago and RAM / PS worked like a charm there. I only noticed that it was the wrong board when pfSense reported 4 cores. And it was already running for quite some time when I realized I got the wrong board. ;) -
Looks like it was a faulty mainboard after all. The new one ran without fans for over an hour without any segfaults. And it's 30 degrees Celsius in that room ATM.
Now I might have too look into another case because 40mm fans tend make high pitched noise that does not really go away even when using the NF-A4x10 FLX with low-noise adapter.
I have ordered a Scythe Kaze Jyu Slim 100 mm, hope it does fit. I'll try to attach it to the case cover with velcro tape and leave the second HDD/FAN bracket out.