Drilling a Hole Fixed a Defective Radeon RX 6900 XT
A way to fix a broken trace on a graphics card shown on video.
Sometimes, graphics cards break down. Experienced repairmen can quickly identify the issue and either fix it or send the board to a bin, but some problems require an ingenious fix. KrisFix from GPUFix.de is a GPU repair specialist, and he recently encountered a malfunctioning graphics card that required him to drill two holes in the PCB and restore a trace.
This time around KrisFix got an MSI Radeon RX 6900 XT (which is still one of the best graphics cards despite being nearly three years old) with a rare problem where the fans and LEDs work, but there is no picture. The engineer claims that, so far, he has observed this behavior on six or seven graphics cards out of hundreds he has fixed. The source of the problem was a broken trace between the GPU and a memory chip, which in some cases led to the complete malfunctioning of a GPU.
Modern high-end video cards are highly complex devices using printed circuit boards with 15 layers. Fixing a broken trace that resides deep inside the PCB is a challenge, to say the least, and the broken trace is located on the layer deep underneath the surface, eliminating almost any possibility of fixing it in a reasonable amount of time. Instead, KrisFix had to rebuild it using a wire by drilling two holes in the graphics card, solder a tiny wire to a pin on the memory soldering pad, solder it to a pin on the GPU soldering pad, and solder the DRAM chip and the GPU back.
Drilling a hole in an enthusiast-grade graphics card, such as MSI's Radeon RX 6900 XT, is a precise and delicate process that KrisFix prefers to do by hand. This whole process requires extreme precision and the use of a microscope to solder the hole, solder wires, resolder damaged capacitors, and restore broken traces on top of the PCB that got scratched during the process.
The procedure performed by KrisFix is certainly an extraordinary one, and we assume that the stability of the board's operation was sound. However, the video report does not touch upon whether the manipulation of the memory trace length affects performance. Both GDDR5 and GDDR6 standards support read and write training sequences to ensure signal integrity, compensate for signal variabilities, and optimize timings. Timings were certainly affected by the trace length, though it is unclear how and how this affects performance in real-world games.
While repairmen are not in the business of drilling holes in graphics boards because this tends to damage them, in some cases, drilling holes can actually give life to a video card that is seemingly gone.
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Anton Shilov is a contributing writer at Tom’s Hardware. Over the past couple of decades, he has covered everything from CPUs and GPUs to supercomputers and from modern process technologies and latest fab tools to high-tech industry trends.
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digitalgriffin Saw this last night. Kris does amazing work. So does NW repair.Reply
The direct trace copper to copper will likely have less signal timing issues than the multilayer one as it's a mostly straight trace. -
InvalidError However, the video report does not touch upon whether the manipulation of the memory trace length affects performance.
The fix should have no effect on performance whatsoever. Either the fix is good enough to achieve the signal integrity and timing required for whatever the signal is to make it through at whatever timings the firmware is setting or it isn't and causes glitches. -
Tonet666 That dude is master on his GPU repairing skill. Love his video and Northwestrepair channel too. Learned so much on how to diagnose e gpu problemReply -
The problem was odd, a damaged via connecting a pad under the GPU to 13th layer. It looked like corrosion. I'm not sure how a via, could get damaged, especially in such a place.Reply
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InvalidError
Could have been trapped water from a PCB cleaning step, such as one of those pressure-washed ex-mining cards. (Haven't watched the video, just guessing.)tommo1982 said:The problem was odd, a damaged via connecting a pad under the GPU to 13th layer. It looked like corrosion. I'm not sure how a via, could get damaged, especially in such a place. -
TJ Hooker
Could it potentially affect overclocking? I.e. the limits of what the fix can support are sufficient for stock settings, but still worse than the limits of the original trace?InvalidError said:The fix should have no effect on performance whatsoever. Either the fix is good enough to achieve the signal integrity and timing required for whatever the signal is to make it through at whatever timings the firmware is setting or it isn't and causes glitches. -
InvalidError
Anything that might possibly screw around with signal integrity can do that. Though if your GPU just got brought back from the dead, I'd imagine most people wouldn't be in such a hurry to send it back to hell after shelling out however much the guy charges for his repairs.TJ Hooker said:Could it potentially affect overclocking? I.e. the limits of what the fix can support are sufficient for stock settings, but still worse than the limits of the original trace?