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Don't the S9's autotune? Will they not autotune above their "max" rate even if the chips are kept very cold?
Overclocking the freq would be one thing. This should be OK and should not damage a chip directly. It should only damage it via heat. If the chip is kept cool it should be safe to run until the error rate starts to climb.
Overvoltage on this I don't think I'd recommend unless the voltage is out of specification.
I've overclocked Intel, AMD, NVidia, and ATI chipsets for over a decade now both as a professional and a hobbyist.
Intel does not issue lifespan guidance based on freq. They issue it based on heat and voltage. The only reason you can get away with overvolting a CPU is because most are under-volted from the factory to meet production yields, meet heat design specs, and save electricity. I suspect these ASIC chips are already set at their design voltage due to their application.
I can get my S7's to 770mhz with cold enough air. 5.2TH/s+ per box @ 1700W @ 0.03% error if I keep the reported chip temps at 55C or below.
Slushpool reports 4.9TH/s per box 1hr scoring rate @ 700mhz stock freq right now vs 4.73 advertised @ 50C average temp. 0.0130% error rate. 8819 errors for 68,328,478 diff A + diff R + HW. 17hr run time.
Overclocking the freq would be one thing. This should be OK and should not damage a chip directly. It should only damage it via heat. If the chip is kept cool it should be safe to run until the error rate starts to climb.
Overvoltage on this I don't think I'd recommend unless the voltage is out of specification.
I've overclocked Intel, AMD, NVidia, and ATI chipsets for over a decade now both as a professional and a hobbyist.
Intel does not issue lifespan guidance based on freq. They issue it based on heat and voltage. The only reason you can get away with overvolting a CPU is because most are under-volted from the factory to meet production yields, meet heat design specs, and save electricity. I suspect these ASIC chips are already set at their design voltage due to their application.
I can get my S7's to 770mhz with cold enough air. 5.2TH/s+ per box @ 1700W @ 0.03% error if I keep the reported chip temps at 55C or below.
Slushpool reports 4.9TH/s per box 1hr scoring rate @ 700mhz stock freq right now vs 4.73 advertised @ 50C average temp. 0.0130% error rate. 8819 errors for 68,328,478 diff A + diff R + HW. 17hr run time.
We achieved stable 750 Mh/s with L3+ overvolting and freq settings, and we want to test S9 model, thatswhy we are looking for ways to overvolt S9 too.
