player one Saturn SQR camera

 This Player one cam has much higher full well and FPS than Zwo ASI version:

this is even faster than read mode 0F at full resolution

was it due to over-clocking as in personal computers? 

Speculation:

by slightly over-voltaging the CMOS chip, so that the chip can run in slightly higher clock rate. But data is still output within the required spec.

Of course the the extra heat needs to be properly dissipated, eg active cooling

using IMX323 for illustration below:

the analog voltages, VDDH

1000 FPS kickstarter

 PAM4 demodulation 

Multi slope ADC

    MTK imagiq APU
Paddle lite

AliExpress 

Poseidon pro IMX571