Burned IC on a Gigabyte Z390 Aorus Master

Roli30

http://bios-schematic.com/account/upgrades
Hello, today i managed to ruin my motherboard, its a Z390 Aorus Master from Gigabyte, basically what happened is that i wanted to test a videocard that had 2x 8 PCI power pins , so what i wanted to do is power up the machine with 1 power supply but only for the processor and the motherboard , and one power supply just for the graphics card ( 2x8 pci pins ) , so when i powered on first the Psu for the 2x8 pins , it shorted out a mosfet.
Ive checked everything with a multimeter and seems fine, also checked the southbridge and its fine , but the problem is i cant read what it writes on the little mosfet that is burned , the only thing that its readable on the IC is : 14 5C , but checked after it and cannot find anything , im guessing its some sort of DC-DC converter or Power supply chip for DDR3/DDR4 , maybe from Richtek ?

Can someone help me identify that chip ?
I tried to search boardview files but cannot find any for this motherboard :( ...
Here are some images of the board and the ic that is burned:

Motherboard and burned ic location
Burned ic image

Thankyou !
 

Roli30

http://bios-schematic.com/account/upgrades
Update , the board powers on fine with a graphics card that doesnt need aditional power cables , board workes fineish , so now i know its not a ddr4 controller , it has something to do with the power that goes to the GPU.

Anyone :) ?
 

admin

Administrator
Staff member
Hello, today i managed to ruin my motherboard, its a Z390 Aorus Master from Gigabyte, basically what happened is that i wanted to test a videocard that had 2x 8 PCI power pins , so what i wanted to do is power up the machine with 1 power supply but only for the processor and the motherboard , and one power supply just for the graphics card ( 2x8 pci pins ) , so when i powered on first the Psu for the 2x8 pins , it shorted out a mosfet.
Ive checked everything with a multimeter and seems fine, also checked the southbridge and its fine , but the problem is i cant read what it writes on the little mosfet that is burned , the only thing that its readable on the IC is : 14 5C , but checked after it and cannot find anything , im guessing its some sort of DC-DC converter or Power supply chip for DDR3/DDR4 , maybe from Richtek ?

Can someone help me identify that chip ?
I tried to search boardview files but cannot find any for this motherboard :( ...
Here are some images of the board and the ic that is burned:

Motherboard and burned ic location
Burned ic image

Thankyou !
11609
 

Roli30

http://bios-schematic.com/account/upgrades
I solved the problem by getting the chips number on another forum , it was a Richtek RT9731AZQW , thread can be closed, thankyou.
 
Top