Gigabyte NVIDIA GTX 980 Titanium G1- Burnt resistors - Page 1
Forum section: electronics / repair

author: jastreb
author_rank: Contributor
timestamp: October 26, 2017, 01:27:10 am
content: SO my card recently stopped working and upon taking off the heatsink etc I noticed some burnt components. In the picture below is a whole product image and I have highlighted in yellow the location of the burnt resistors. (bottom right of image). Note this is not a picture of my actual board that has the damage but a hires image i found online for reference.In the picture below is a close up of my actual card. As you can see those two resistors blew up pretty good. They are R172 and R174. The MOSFET above them is questionable too I think and I cannot find anything on it but I will try and replace with one from the Fairchild family of MOSFETS. I haven't tested it yet but I will do so tonight. I am suspecting anything in that general close proximity to the resistors that blew.If somebody has the same card and they could give me the values of those resistors I would be grateful. As a bonus feel free to give me the value of the other two resistors and caps in that general area if you feel generous (R171,R136,C177).I did search for a schematic but I doubt I will ever find one. And if somebody can give me some tips on how I should go about fixing this card apart from just replacing those resistors that would be AWESOME!!!Thank you all in advance for your time.

author: Viktor800428
author_rank: Newbie
timestamp: December 13, 2017, 01:55:09 pm
content: Hi jastreb,I have exactly the same problem, those 2 resistors have burned to coil. Have you found out the values of them?If so, have you tried to resolder them?Thank you!

author: Samogon
author_rank: Frequent Contributor
timestamp: December 13, 2017, 05:20:19 pm
content: Looks like they are part of the DC-DC converter can you trace where they are connected?

author: jastreb
author_rank: Contributor
timestamp: January 10, 2018, 03:15:31 am
content: Quote from: Viktor800428 on December 13, 2017, 01:55:09 pmNo I haven't found out unfortunatley. I been away for a bit so I am about to start trying again.

author: jastreb
author_rank: Contributor
timestamp: January 10, 2018, 03:26:33 am
content: Quote from: Samogon on December 13, 2017, 05:20:19 pmI will do so and get back to you with the information.

author: Bashstreet
author_rank: Frequent Contributor
timestamp: January 10, 2018, 06:29:22 am
content: More importantly why did they blow...

author: jastreb
author_rank: Contributor
timestamp: January 11, 2018, 07:30:04 am
content: Quote from: Bashstreet on January 10, 2018, 06:29:22 amThe card was used 24x7 intensively by a researcher for doing calculations so it had a hard life. I want to replace those resistors and that mosfet above it. I just wish I knew the value of them resistors.

author: Rasz
author_rank: Super Contributor
timestamp: January 11, 2018, 09:25:48 am
content: as insane as it sounds they appear to be used as a fuse :/jastreb Viktor800428 did you clean your PCBs and traced the pads?R172 R174 R171 and R136 are all in parallel between one of the power rails and mosfets, like in this card(4Kx2K picture, open in separate tab to see details):0 ohm linksEdit: not fuse(at least not primarily), they are used to pick which Power rail (6/8 pin socket) will supply Vram DC-DC converter, like in the card above (Q19 Q20). Thats why there are always only 2 resistors and 2 empty spots.They would work like a poor mans fuse if one of Vram mosfets shorted. Clean the pcb and check for shorts.

author: rajkosto
author_rank: Newbie
timestamp: January 25, 2018, 06:58:48 pm
content: something similar happened to my card as well, this is how far ive gotten so far in trying to fix it:waiting for chinese shipments of the broken mosfets/pwm controllerEDIT: for the back mosfets, i think all they are for is connecting PCI-E power to one of the main power planes so that the card can show an error message if you dont connect up the massive power connectors.can anyone confirm:

author: leopoldyy2
author_rank: Newbie
timestamp: May 07, 2018, 01:58:37 pm
content: whether the card is workingHelloI have the same problem. I did not burn it so much but I can not read how much they have omh. because they have zero. colleague, write to do it briefly, so give a connection without a resistor, and this will not damage the card more ??and this is how damage looks like, I can not see anywhere else

author: jastreb
author_rank: Contributor
timestamp: June 01, 2018, 05:21:43 am
content: Hi , no I have not done anything with it. I am about to have a look at it again this weekend as the replacement card I bought is now dead. Have you had any luck?Quote from: Viktor800428 on December 13, 2017, 01:55:09 pm

author: uandric
author_rank: Newbie
timestamp: March 07, 2019, 07:43:52 pm
content: I was able to fix mine.. here is the video explaining what i did.https://youtu.be/yD7Ud8fYGaw

author: vita_tec
author_rank: Newbie
timestamp: September 25, 2020, 01:35:16 am
content: hello i have the same GTx 980 TI with burned resistor .but my burn wear bigger. almost through all layers. this is a bigger project of mine but today i removed the short and the card did the first test. just have to get everything ready. when everything is ready I'll make a video on my youtube channel. you can see briefly what it looks like here on my instagram channel there are pictures and short clipshttps://www.instagram.com/vita_tec/