Hi everyone,

I have a Gigabyte RTX 3080Ti Gaming OC 12G (GV-N308TGAMING OC-12GD) with a confirmed hardware fault on the 8-pin #2 power connector. I have done extensive diagnostics and need help identifying the exact component to replace.

System specs:

• GPU: Gigabyte RTX 3080Ti Gaming OC 12G
• CPU: AMD Ryzen 7 5700
• Motherboard: ASRock B550 Phantom Gaming 4
• PSU: Corsair RM750e
• RAM: 64GB DDR4 2666MHz

Symptoms:

• 8-Pin #2 draws only 0.3W at idle and 0.4W under full load
• 8-Pin #1 works perfectly (88W idle, 152W under load)
• Total power draw limited to ~211W instead of 370W (BIOS default)
• Performance limited to ~70% in 3DMark Time Spy (score: 11,965 vs average 16,923)
• Card boots and works normally with only 8-Pin #1 connected
• 12V voltage IS present on 8-Pin #2

Diagnostics already performed:

• All connector pins → continuity OK
• Polyfuse → continuity OK 
• No visible burn marks on PCB 
• uP95120 PWM controller visible on PCB 
• GPU-Z BIOS: Power limit default 370W, maximum 370W 
• HWiNFO confirmed: 8-Pin #2 stays at 0.3-0.4W even under full load 

Which specific component should I test/replace on the 8-Pin #2 power circuit? Is there a boardview or schematic available for this exact card?