“Initially, the GPU arrived with the typical problem of melted power connectors.”, — write: www.unian.ua
Initially, the GPU arrived with the typical problem of melted power connectors.
Northwest Repair showed how it repaired a bent RTX 4090 / Photo – Northwest RepairThe Northwest Repair blogger received an Aorus RTX 4090 video card with, at first glance, a typical problem – a melted power connector. But it soon became clear that before the master was a GPU that had survived at least one failed repair attempt.
The first thing that caught my eye was the curved video card. The back cover was held on by plastic screws, the body was scratched and dented, and the radiator was twisted so much that it could not be returned to its normal position.
During disassembly, it turned out that the heat pipes are intact, but the cooling plate separated from the evaporation chamber, and the thermal pads did not touch the memory and MOSFET. This means that the video card worked almost without cooling.
After an external inspection, the technician connected a multimeter, after which he found a short circuit on the 12V, 1.8V and VRAM lines. During the supply of current through the 12-volt bus, the thermal imager showed strong heating in the memory area.
Under the microscope, it became clear that the card had already been in the service: the board was missing components, and one of the mounting holes had traces of grinding.
At first, the master assumed that one memory module was damaged. But after dismantling it, the short circuit did not disappear, and therefore, 12V went through the entire memory circuit, probably burning all the chips at once.
When a higher current was applied, the power element overheated, which confirmed that it was the source of the breakdown. After replacing it, the 12 volt line came back to life, but the VRAM was still shorted.
The last test turned out to be decisive: during the injection of several amperes into the memory, the GPU chip itself began to heat up, which clearly indicated fatal damage to the core. In fact, the 12V voltage flashed the entire memory and reached the crystal, destroying it.
The master admitted that it was no longer possible to save the card. According to him, the card went through a DIY repair where a soldering error or replacing a MOSFET without checking the insulation caused a chain reaction that destroyed a GPU worth over $2k.
We previously reported that a PC repair specialist criticized the RTX 5090 graphics card. Northridge Fix was unable to fix the RTX 5090 Founders Edition.
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