Biodom or Anyone else,
Help me remember... Did Batch 6 have 135 chips or 162 chips? My question was never really answered about number of chips. I'm curious if I would get similar efficiency with under clocking as Biodom mentions here with Batch 6 but similar with Batch 8?
Batch 6,8,9 are all 135 chip. Efficiency should be similar so long as the Buck Converter is set to the same voltage, which it may well not be, in all batches?
Rich
Miners can't be identical if batch 8 can have 200W difference in power usage at same frequence.
Which other Batch are you comparing the Batch 8 Miner to?
Rich
They are both batch 8 23.11. 2015 shipped takes 1210W with BM APW3... and 23.12. shipped takes 1410W, something very bad happened in that month.
Early bird is little bit on the edge with 700 Mhz but works anyway at that, so I think core voltage is adjusted to later units with hardware or HW mods.
My testing for the very early batch 8 is posted here efficiency were 0,26W per Gh/s 600-700Mhz and if I remember correctly 400Mhz were also about 0,26.
Later batch 8 takes specsed 1293W +10%, with 0C air feed it took 75w less but I didn't get 4700Gh/s 700Mhz as miner was running cold and rpm was 19xx and didn't went slower.
Later is running to some specs but 0,25J/GH is bull.