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Graphics card with weird red artefacts (SuperMac Spectrum Power•1152)

Posted by: ktkm on 2020-04-12 15:24:02 SuperMac Spectrum Power•1152 graphics card with weird red artefacts (the HD icon labels) that appear after being connected to an AppleColor High-Resolution RGB Monitor for 5–10 min. (The card works great with an Apple Studio Display.) Sound familiar?

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