The power supply unit equipped with a power button must be turned on before installation. Yes, you can fit 240 AIO along with 3090. But, keep in mind, the case developed for fully liquid cooling. So, optimal case usege is 360 rad full custom loop.So, now it's version with AIO compatibility, right? i can fit for ex 240aio + RTX 3080/3090FE?
And about PSU, on silverstone render i can't see on/off button. My Corsair SF750 have it.