Dang that's a bummer NotFuzzy. A good R4 is like a unicorn; you've heard about them but don't really see them!

Even my R4B2 is mostly R2B2 anymore with only one board that consistently hashes. Might need to do another cleaning.

the good unicorn is the first batch of T9. I have few and since running non stop. 2 of them once made 183 days straight.
I picked up 3 T9's from batch-3 and ja - good machines aside from being power hungry. All of course running 24x7x365 with just 1 fan failure until last month when 1 went into huge HW errors on all 3 boards. Replaced with an A841 of course.
Starting to get quite a pile of s9 carcasses to stash at work... Since it looks like s9's can now be hacked to allow freq and Vcore adjustment, wonder if Sidehack might be interested in me donating them to him for making into fairly quiet & efficient heaters like we did with the slew of s7's I had...
Here Blockie Blockie!!!!