Gigabyte R9 390 8GB - identify 2 burnt chips?

[dominik0801]

Hello!

I have a VGA card. While I was using the PC, it turned off, restarted, and the lights on my VGA started to blink then it turned off.

I took it apart, but I can't identify the 2 burnt ICs.

Could someone, who has the same (or similiar PCB based) card help me?

[adels]

Re: Gigabyte R9 390 8GB - identify 2 burnt chips?

I have a card like this in my bench, do you still need the ic names?

[gurj1979]

Re: Gigabyte R9 390 8GB - identify 2 burnt chips?

See pics for the part numbers. But you'll have to Google for the numbers.
Perhaps try search for "SMD Marking" followed by the numbers on the IC's.

[MasterCap]

Re: Gigabyte R9 390 8GB - identify 2 burnt chips?

I would guess, the 5 pin chips is an AND gate, of the 74 series logic chips. Pin 5 and 1 end of C101 will probably be directly on 3v3 rail, and pin 2 or 3 is probably gnd. Pin 4 is probably pulled up to 3v3.

The 8pin was probably some PWM or fan controller type chip. The bunch of 1AM chips are 2n3904, they might be making a 1/2 bridge driver for the fan ??


Ok the C23 chip is probably this IC, for the PWM of the fan no doubt.
https://cdn.badcaps-static.com/pdfs/...7e9e5e27be.pdf


Now why did they burn out, and did anything else, and will it just happen again if just those parts are placed, IDK