This is probably not a good idea. No way that mATX motherboard was designed to deliver that much power to the PCIe slots.
Remove one or two cards, and see if it runs stable. If it does, you are going to need powered risers.
Roger that, the board has just one PCIe x16 slot and three PCIe x1 slots clearly not having been engineered for multi-GPU computing.
The fact of the matter is, only PCIe graphic cards are allowed to draw up to 75W per slot - all other PCIe devices are limited to 25W.
Do note that motherboards officially supporting triple- or even quadruple GPUs are equipped with additional power connectors for powering the cards up.
Fitting multiple PCIe x16 slots can be regarded as a kind of declaration by the manufacturer.
A typical mini-ATX board is what it is - an inexpensive piece of equipment meant for low-power PCs.
Did your combination of 5870s ever work in a stable fashion with this board?
Don't worry about that umount nonsense, the persistent liveusb version which you must be running is mounted as /cdrom.
While the system is running try issuing the command
cat /proc/mounts | grep cdromThe result will point to your usb drive (/dev/sd*)
I'd like to thank everyone for their assistance. The machine ran fine for three days at 950/170 and averaged around 1650 MHS. I actually have two of these machines that contain the exact same parts. I managed to bring the second machine online on another pool for testing purposes and it has been running without fault for almost 3.5 days now with the cards in it at:
0: 975 / 170 v1.100
1: 850 / 1200 v1.163
2: 975 / 170 v1.100
3: 975 / 170 v1.100
I have one weak card in that system that for some odd reason will not overclock, but that's another issue. I don't
I restarted the machine in question twice to disable some items in the bios, lower the ram voltage, and change some options. I changed the clocks to 960 around 12:30am and around 11am I noticed that it had gone down. I can check the pool's time line of my shift work to see the exact time, but I don't know if it would help any.
I've been working on it now for about an hour attempting to trouble shoot and here is what I have found. I am currently using the machine from the live boot CD to post this. I had the USB flash drive that I have the OS on installed. It would only sit at the Xubuntu 11.04 screen and eventually after about 30-45 minutes it would display the mounting error message. I booted the machine from the live CD with the flash drive still in the back by changing the boot order in the bios. With the flash drive in, but booting from the CD I had all sorts of odd issues. The flash drive did not immediately mount, but rather I had to remove it, and reinstall it for the drive to be seen. With it mounted, I went to explore the drive, but every time I attempt select the drive it shows for a split second and closes. I cannot access the files on the drive through a visual source. I haven't tried to terminal run anything as I'm pretty much a Linux noob. The machine would also not allow me to open any program or connect to my internet source. I removed the drive and am now running from the boot drive without any issues. I'm wondering if my physical reset of the computer via the pins somehow screwed up my flash drive. I'd really like to avoid having to reload the OS to a drive and reinstall all of the software, but that is my next logical thought process. As much as I would like to avoid it I think I'm going to give creating a new liveUSB from another flash drive a try unless anyone has any other thoughts?