Another one of my old Apollo BTC units is doing strange stuff.

It does not have  a SBC and is connected to another Apollo by USB cable, started with a terminal command.

This Apollo will only sometimes hash at the requested power level, at other times it seems to be stuck doing about half as much work as it should. This is confirmed by on-the-wall power measurement and by what hashes arrive at the mining pool over time.

Once it's in that lazy mode, it stays that way even after several reboots and when using the same command from the memory of the terminal.

In this 'lazy mode' it shows this:
*** BOARDS SYS INFO (1 boards, 44 chips):
BRD  FOUND      REV   SPI     PWR  CHIPS  ON  ON_T  inOhOsc  OhOscN  OhOscT  OhN  OhT  loI  Tc  Th    T, C              TA  RevADC   OCP     HE  osc  OSChip               U, mV               I, mA  P, Wt
  0      1  BREV:20  1x 4  2x2x11     44   1     1        0       0       0    0    0    0   0   0   41  0    0( 0)  0( 0)    4004  0x00  0 (0)    0  0:3:10   U0: 9863 U1: 1302   I0:12983 I1:12975    144


after having been started with these settings:

./apollo-miner -host... -port.... -user..... -password.....  -comport /dev/ttyACM0 -brd_ocp 80  -osc 50 -ao_mode 1 -fan_temp_low 65 -fan_temp_hi 70 -fan_pwm_low 1 -fan_pwm_hi 100

I'm heating the bedroom with that Apollo, and I'd like it to churn through around 250W.

It has a large aftermarket PSU and a 200mm fan and a different 80mm fan that spins slower than the original, is therefore very quiet, but now also very low hashrate and very low heating.