RTX 4080 Suprim X PCB breakdown notes
Added 2023-01-19 10:11:30 +0000 UTCFuses:
12A on PCI-e slot
20A for memory VRMs
Input filtering bulk capacitance
11x 180uF 16V TH aluminum polymer
22x 100uF 16V SMD tantalum polymer
Vcore
Controller: UP9512R 8 phase
MOSFETs: 18x NCP302150 50A DrMOS (2 per phase and 3 in some)
1.2V 500KHz 150nH (DrMOS only)
300A ~27W
400A ~38W
500A ~57W
600A ~78W
Vcore VRM bulk capacitance
42x 220uF SMD aluminum polymer
Vcore core bulk capacitance
2x 470uF SMD aluminum polymer
3x 10x MLCC
Vmem Controller: UP9529Q 3 phases
MOSFETs: 3x NCP302150 50A DrMOS (1 per phase)
Vmem bulk capacitance:
9x 220uF SMD poly
NOTEs:
The capacitor configuration is surprisingly similar to the 4090 SuprimX however the DrMOS components are much worse than the SPSs used on the 4090. Also the controller has been downgraded from the MP2891 to the UP9512 and UP9529. It's not the worst 4080 PCB but I also wouldn't call it the best.
