- Joined
- Apr 4, 2015
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Wow, there is some grave misinformation regarding the ATI 9800 cards here.
They didn't die because of the metal frame or shims. ATI cheaped out on the memory cooling and just left it bare. Over time, with many heat cycles and the mechanical stress of gravity, the solder joints underneath the memory often crack. That causes the typical screen artifacts that are shown here for instance.
If you have a hot air soldering station, a powerful preheater and some reballing flux, these errors are fixable relatively easily.
How do I know? I've repaired about 25 of them over the last 2 years. On 90% of them, a memory reflow did the job. And with reflow I mean: liquid solder joints, flux, and nudging them with a pair of tweezers.
If you wanna know why they put the metal frames on the GPUs: It's simply to stop the GPU from warping when getting soldered onto the board in the factory. With larger GPUs (4cm edge length and up), they had the problem of the outer edges of the substrate curving up and the solder balls not making contact any more. This was especially true when using a thin substrate like G71 GPUs. You can notice the curvature when reballing them.
Edit: Found the Nvidia document talking about this.
Little pic of my current ATI collection (just highend cards), so this isn't just a text post. More than half of these were defective when I got them btw.
They didn't die because of the metal frame or shims. ATI cheaped out on the memory cooling and just left it bare. Over time, with many heat cycles and the mechanical stress of gravity, the solder joints underneath the memory often crack. That causes the typical screen artifacts that are shown here for instance.
If you have a hot air soldering station, a powerful preheater and some reballing flux, these errors are fixable relatively easily.
How do I know? I've repaired about 25 of them over the last 2 years. On 90% of them, a memory reflow did the job. And with reflow I mean: liquid solder joints, flux, and nudging them with a pair of tweezers.
If you wanna know why they put the metal frames on the GPUs: It's simply to stop the GPU from warping when getting soldered onto the board in the factory. With larger GPUs (4cm edge length and up), they had the problem of the outer edges of the substrate curving up and the solder balls not making contact any more. This was especially true when using a thin substrate like G71 GPUs. You can notice the curvature when reballing them.
Edit: Found the Nvidia document talking about this.
Little pic of my current ATI collection (just highend cards), so this isn't just a text post. More than half of these were defective when I got them btw.
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