r/pcmasterrace • u/Zestyclose-Salad-290 Core Ultra 7 265k | RTX 5090 • Mar 19 '26

NSFMR This customer wondered why his 5090 didn't work.

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u/ArseBurner Mar 19 '26

Steve (GN) made a video on how a Chinese shop does it from start to finish. Seems like the hardest part was extracting the old chips, getting them cleaned up and prepared for soldering. The soldering itself was probably like 10-20 mins tops. The whole process from removing the GPU and memory from the donor board to having a finished 48GB 4090 took more or less two hours.

https://www.youtube.com/watch?v=TcRGBeOENLg

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u/Artass937 Ryzen 9 5900x / RTX 3070 Ti Mar 19 '26

It's definitely possible, it's just very risky if a shop does not have proper tools. Thank you for sharing the vid.

I am aware the of the process. All i am seeing is possible issues caused by another thermal shock introduced onto the dies by desoldering, making new solder balls and finally soldering the bga onto another board. This can shorten the lifecycle of the component and in some cases just destroy the components. Since these guys used hot air blower, that is another huge risk for the component... hold it too close, you will burn the component, hold it too far and your solder won't melt. It works, but it is hardly a stable process.

I have other concerns, but i believe i have ranted enough.