The S5 are running great and so I've moved them to CGminer 4.90 and 312.5MHz. The highest reported temp is 57C with an S3 push fan and no pull (ambient ~72F, fan rpm 3240). Am intending to try the FHP141 as a pull.
My final two S5 shipped Friday and would have arrived Monday, but somehow, the UPS driver screwed up the delivery and a different driver completed Tuesday -- bummer on the whole day delay, lost some good WestHash payout
!!!
Have received two each by USPS EMS, Fedex, UPS, and all would have been "two day" delivery (excluding Sunday and the UPS SNAFU), lowest shipping cost was EMS via DHgate back in January. The latest two (with S3 push fans) are setup side by side on the floor of my coolest room running 312.5MHz and temps 47/42 and 43/40 (top temp was 59 Vs 52 at 350MHz over a 2-1/2 hr check out). That first consistently runs by far the highest temp and fan speed of my three pair and makes me consider the heat sink paste mod described earlier** (currently 2760 Vs 2160 rpm) -- it also had pre-damaged Phillips head screws by whatever gorilla installed and warped the plastic side panels (since loosened). Am expecting to give Silverstone FHP141 pull fans a try this coming weekend.
Thanks again Bitmain for the timely ordering assistance (Janet/Tim) and quick turnaround of the order -- here's looking forward to learning about the next generation!
**https://bitcointalk.org/index.php?topic=902305.msg10926267#msg10926267
Three Silverstone FHP141 fans arrived Thursday and I took before and after temp and fan readings. The temp reduction I'm seeing on three S5 (w/ S3 push fans) is only on the order of 1C at 312.5MHz, but may be more noticeable at 350. Will look at that more when the next batch of three fans arrive. Between 312.5 and 350MHz, both fans appear to pick up roughly 120rpm, approximate norm being 3240/1560 -- current 350MHz temps being 56/54 and 54/53, aprox ambient measuring 72F(22.2C) a couple feet from the miner intakes.
My max temp reduction results from running the same fan (S3) for both push and pull, but that hugely increases the noise. S3 push only gives just the sound of blowing air, adding the FHP141 reduces the air noise, but adds a distinct hum. I got the following stable results @312.5MHz (one individual S5):
test case temp fan
S3 push only 58/52 3240
plus FHP141 57/55 3240/1680
S3 push/pull 54/53 3000/2880
Subjectively, the quietest case is the S3/FHP141 combo, the by far loudest is the S3/S3 combo, though the stock S5 is easily louder yet. I'd say the S3 push only works pretty well (depending on clock and ambient temp) and the FHP141 may be worth trying, but there is some hum.
PS -- Appears the Silverstone FHP141 is indeed a PWM fan, wasn't at all clear to me from the manufacturer's description.
