Anyone that purchased multiple units seeing a large range of chip temps by unit?
One of my units is showing 105/79 and 93/103. The other that is sitting right next to it, with same airflow and ambient temps showing 70/70 and 55/75. Doesn't make sense. Do you think the lower temperature unit is reading the temps incorrectly by chance? The other 2 R4 batch 1 unit chip temps I have in the room are all about 88c~
Ja temps on the auto tune miners will vary a lot from miner to miner. Part of what auto-tune seems to do is look at hashrate vs temp and use that data as part of the Majik Sauce of speed, temp, and Vcore used to produce as-advertised total hashrate. That process lets them be less picky about what params are best for any particular group of chips from the Foundry and that in turn gives them a lot more usable chips. -- If any individual hashboard(s) under-performs they make sure a better one is in the same miner to give advertised speed.
I agree with this, I've got one board in my R4 b2 that's 105 deg. C but is the slower (555 M avg) of the 2 and also the one putting out 215 HW errors vs. the other at 91 deg. C that's only got 16 HW errors at 559 M (avg).