Post
Topic
Board Hardware
Re: Bitmain Announces the Antminer R4 and APW5 Power Supply, Designed for Silence
by
NotFuzzyWarm
on 08/12/2016, 21:46:12 UTC
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.