GPUs in one motherboard is more accurate than GPUs on two motherboards, I have 6x gpus on a motherboard and 4x on another and after three days of mining the result isn't accurate as mining calculators said, I always short of 1200 satoshis and I got a new motherboard with 12x pcie slots and put all GPUs on the motherboard and it becomes even a bit better 1360 sats more on my daily earnings, crypto mining is crazy, have anyone seen such before?
first,.... what coin you mining, if eth, no weirds this happen because eth network fees spike lately, either one of your gpus got bigger shareor not, is like got lottery from eth fees not from reward, lottery bonus