RTX 4090 Zotac AMP Extreme AIRO PCB Breakdown notes (Patreon)

Dual BIOS

Input filtering bulk capacitance32x 330uF TH poly

VcoreController: UP9512 8 phaseMOSFETs: 24x AOZ5311NQI 55A DrMOS (3 per phase)1V 500KHz 150nH (power stages only?)300A ~24W400A ~36W500A ~48W600A ~63W800A ~115W

Vcore VRM bulk capacitance: 28x 1200uF TH polyVcore core bulk capacitance: 4x 470uF SMD poly2x 10x MLCC

VmemController: UP9512 4 phasesMOSFETs: 3x AOZ5311NQI 55A DrMOS (1 per phase)Vmem bulk capacitance: 10x 330uF SMD poly

Notes:This card probably has the highest total input and output filtering capacitance of any RTX 4090. Unfortunately said capacitance comes almost exclusively in the form of through hole polymer capacitors which have a lot more ESL than the SMD polymers that you see on better RTX 4090 PCBs. So I wouldn't expect the voltage regulation on this card to be particularly impressive. As for current handling capacity. It's not the best but it could be a lot worse.