According to your logs, one of the ASIC chips reach 110c which I guess is the maximum chip temp before the temp protection was activated.

Here are the logs that I'm talking about check the PVT_T0 begin counting on the last 27 to the left

Code:

PVT_T0[ 66 69 77 74 68 69 67 69 72 72 70 66 67 72 76 75 69 69 70 72 75 76 70 68 67 70 73 73 70 67 67 71 74 73 71 67 67 69 73 75 74 70 66 69 74 70 67 67 64 67 68 70 69 65 62 68 68 62 64 64 59 61 58 61 62 62 64 61 60 63 60 63 64 67 66 64 65 64 66 64 61 63 65 82 66 65 61 64 66 64 65 63 64 110 65 67 65 65 64 62 68 66 66 64 61 61 83 66 64 63 63 61 67 62 65 66 59 57 63 64]
PVT_T1[ 61 64 69 67 67 64 62 67 67 73 68 65 65 68 72 76 69 68 67 67 76 72 70 69 65 69 77 72 68 65 65 69 71 70 85 68 65 70 74 73 70 67 65 67 69 71 65 66 63 65 66 69 68 65 60 66 68 63 64 62 59 56 57 59 61 63 62 61 59 59 63 63 64 63 61 61 65 65 61 63 62 62 65 66 64 66 64 63 65 65 64 62 62 62 64 62 67 63 62 65 67 65 62 64 65 62 62 65 64 61 59 62 64 64 64 64 60 60 64 64]
PVT_T2[ 66 69 70 69 69 70 69 73 73 72 70 64 66 81 72 71 73 119 67 74 73 73 69 69 67 73 74 74 94 67 68 73 72 76 74 67 69 73 74 75 72 69 69 69 73 71 73 68 64 68 70 69 67 67 65 66 68 63 65 64 59 61 59 64 63 59 61 64 64 62 66 66 66 67 65 65 68 69 69 64 63 63 68 67 64 67 62 67 69 68 65 68 104 67 68 66 67 67 65 66 68 66 68 67 79 68 69 64 68 70 68 68 68 66 67 67 79 60 67 68]
PVT_V0[305 308 309 307 305 305 303 306 304 298 301 297 302 301 301 298 299 297 298 304 301 298 302 301 303 299 299 300 303 301 295 299 301 302 301 303 302 301 301 297 298 299 298 299 298 306 301 302 306 302 298 303 303 307 307 307 307 305 309 312 313 308 306 309 308 310 313 311 312 311 310 307 305 309 306 306 305 303 301 302 301 309 311 323 309 307 309 305 305 308 305 307 305 350 305 303 305 306 307 305 305 305 310 309 307 307 317 303 305 307 305 304 305 306 309 306 307 310 307 312]
PVT_V1[303 307 304 310 307 305 318 312 312 303 300 298 299 299 300 306 307 309 302 299 296 301 299 300 306 304 298 309 300 298 299 298 294 297 309 297 309 305 306 293 298 297 306 307 307 298 293 294 302 301 299 304 303 301 301 306 306 303 304 313 319 312 310 313 309 312 306 307 306 306 311 313 302 301 311 305 305 307 301 305 307 305 302 309 301 302 304 309 315 313 306 307 303 302 302 307 310 311 309 310 304 302 316 315 315 309 307 313 306 305 307 312 314 307 313 309 304 301 302 303]
PVT_V2[299 302 302 301 301 303 310 314 315 305 302 303 309 309 298 308 305 345 305 301 301 299 300 301 299 304 296 306 316 300 298 299 294 295 299 297 299 299 306 297 299 305 298 301 295 307 303 301 301 302 298 300 304 305 306 306 314 306 305 310 317 309 307 305 304 305 301 303 301 303 302 304 302 301 303 309 311 309 301 303 302 305 303 303 307 308 311 307 304 305 308 308 336 310 311 309 309 307 311 301 302 307 309 312 326 310 312 314 308 303 305 306 307 304 301 303 312 306 305 307]

I just include voltage because I saw 350 under PVT_V0 of the first chip before the next chip reaches 110 temps. That was your 1st hashboard the 2nd hashboard doesn't show any high temp and the 3rd hashboard it has 104c.

What I guess maybe the first hashboard has a bad heatsink bad adhesive or solder. However, would you mind try replacing the PSU I see weird under Vo it shows 0 so it might be your PSU giving a false signal?