Righto, thanks. I doubt anyone goes out of their way to trust my opinions, but I really like Bitmain gear (for disclosure, I own about 15 undervolted S1, run an S2 Kit and an S3) and I can't recommend the S5 until I trust a few things have been taken care of. It'd be really nice to have gotten ahold of one of those evaluation units, but then a thousand other people could say the same thing.
the big fear is will behave like Asic Miner"s tube or prisma.
I owned both of them and both had current/heat runaway problems. very hard to keep stable.
Once I get the test module I can
A) undervolt it with 1 psu.
B) over volt it with another psu.
C) volt it perfectly with a high quality psu.
D) sent 11 volts to one board and 13 volts to the other board. using 2 different psu's
E)Set a low freq
F) set a high freq
G) add the higher quality silverstone fan for cooling
The s-1 and s-3's I have had were all good or very good. 1 dead ethernet and all else good out of 30-35 units.
I have read problems on the s-2 the s-4 the c-1
but I never had one of them to test