Yep, I am another crypto currencies miner. But in all truth, I find the hardware challenge more fun then the bitcoin stuff.
Power is not the issue (any more). I have 2Kw worth of PSU. 2X HP Common slot 750W PSU + Thermaltake 500W PSU. Currently, with all 8 cards running full tilt, across two motherboards, and I am drawing 960~1000W. Those numbers are according to a Kill-A-Watt meter. Hardware wise, this is all x86_64. Arthur: Thanks for the details. I have a board that with give me a "missing memory" beep code with more then 6 GPUs. Now I understand why! How can I track down how much system DRAM a GPU is using? These are all the newest Nvidia Pascal based cards. Mostly GTX 1070's. On an interesting note, one of my oldest motherboards, a Gigabyte GA-970A-UD3 will boot with all 8 cards, but gives me the no VGA beep code. Serial console for the win! Is this just a BIOS level issue? Or is there some hardware component I should be aware of? Thanks for the help. -Adam On Thu, Jan 4, 2018 at 8:14 PM, Zoran Stojsavljevic < [email protected]> wrote: > > I am totally off the deep end and don't know where else to turn > > for help/advice. I am trying to get 16 GPU's on one motherboard. > > Hmmmm. Yet another crypto currencies miner. ;-) > > > Whenever I attach more then 3~5 GPU's to a single motherboard, > > it fails to post. To make matters worse, my post code reader(s) don't > > seem to give me any good error codes. Or at least nothing I can go on. > > You should have at minimum 1KW PSU for this job. At least... I guess, > even more (for 16 discrete GPUs) 2 x 1KW would be reasonable. > > Zoran > _______ > > On Thu, Jan 4, 2018 at 8:38 PM, Adam Talbot <[email protected]> wrote: > > -Coreboot > > I am totally off the deep end and don't know where else to turn for > > help/advice. I am trying to get 16 GPU's on one motherboard. Whenever I > > attach more then 3~5 GPU's to a single motherboard, it fails to post. To > > make matters worse, my post code reader(s) don't seem to give me any good > > error codes. Or at least nothing I can go on. > > > > I am using PLX PEX8614 chips (PCIe 12X switch) to take 4 lanes and pass > them > > to 8 GPU's, 1 lane per GPU. Bandwidth is not an issues as all my code > runs > > native on the GPUs. Depending on the motherboard, I can get up to 5 > GPU's to > > post. After many hours of debugging, googling, and trouble shooting, I > am > > out of ideas. > > > > At this point I have no clue. I think there is a hardware, and a BIOS > > component? Can you help me understand the post process and where the > hang up > > is occurring? Do you think Coreboot will get around this hangup and, if > so, > > can you advise a motherboard for me to test with? > > > > Its been a long time sense I last compiled linuxbios. ;-) > > > > Thanks > > -Adam > > > > -- > > coreboot mailing list: [email protected] > > https://mail.coreboot.org/mailman/listinfo/coreboot >
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