no gpu is not overheating, thew teperature of gpu is only 34o
in the sapphire trixx the clock is 1250x1716 (default)
see the picture
https://s29.postimg.org/kxpxtuyx3/trix_JPG.jpgthis bellow is the last lines and the line presentes in log
21:57:51:449 97c Setting DAG epoch #92...
21:57:53:574 13f0 Unsupported Overdrive version 7
21:57:53:574 13f0 Unsupported Overdrive version 7
21:57:53:699 38c Setting DAG epoch #92 for GPU #0
21:57:53:699 38c Create GPU buffer for GPU #0
21:57:53:699 97c Setting DAG epoch #92 for GPU #1
21:57:53:714 97c Create GPU buffer for GPU #1
21:57:56:606 13f0 Unsupported Overdrive version 7
21:57:56:606 13f0 Unsupported Overdrive version 7
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Are you using the recommended catalyst 15.12 ? Because overdrive is AMD auto-clock / fan management so if claymore use the one present on your system it may be too old or too recent to be claymore compatible.
what command do you use to launch claymore ? Any gpu oc or temp managment in the cmdline ?
You should try to completely replace current PSU with the spare one you tested before to check if main PSU isn't in trouble
