I gave the IMAC A1312 for repair (the 6970 video card went out). We agreed to install a similar one. The master offered a choice of video cards, which, allegedly, in his opinion, can be installed there and everything will work. It has been 4 MONTHS since the "REPAIR". Comparing the chronology of events, it came to me (it's a pity that it's too late) - the master relied on chance when choosing a video card, and not on knowledge and experience, he decided to put the experience on my machine). The result of the experience, 4 months of waiting, a broken train and a split (and I tried to solder it clumsily- instead of replacing it with similar parts) and a COFFIN ON MY HANDS.

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