I doubt it will have any appreciable impact on the heat of the box.

Please DO NOT place cardboard or any flammable item on top of the Antminer.  It can be a fire hazard.

What about some thin plastic like the sides. Does it get hotter on top then the sides?

Hello all,

sorry but no time to read all the previous treads...

Do anyone actually purchased the miner, got already and started to use??

Thank you

Got a new S5 a couple of days ago. It runs VERY hot compared to my older ones. Like 20C hotter . Anyone else see the same thing?

Did I miss something on their website for the product?  It references a "final production run", not used cast offs from their own mining farm.  One unit I received looks pretty good overall, the other looks like it's been running somewhere sitting on a dirt floor for several months.  Neither appear to achieve a stable hash rate near the claimed spec.  I'm lucky to get over 1TH out of either one although the GUI claims all the chips are fine.

Only running around 48 C on temps (seen 51 a few times briefly) in an ambient temperature of around 72 degrees F (that's fairly normal room temp for the metric minded), but with the suboptimal output, not surprising I guess.  Fans at 3360 RPM at 48C on the dirty one.  Seems like the fans could back down a bit.  Other is slightly less and runs slightly hotter.

I got the impression from the reviews that they built a pretty good miner, but I'm getting a little different impression first hand with these two.  I'd be willing to bet the fan on the dirty one fails pretty soon.  The dirty fan is definitely louder than the other.  I can hear it over my ASICMiner Prisma even, and that thing is loud.  At least it achieves (exceeds most the time) its claimed spec for the noise it makes though.  I'm way outside the -5% on both these units.  Average hash after an hour, 998.88GH/s on the dirty one which seems to run slightly better than the other speed wise.  I've tried different pools including AntPool with the same results.  Has 1947 HW errors in an hour too.

How do I tell whether I have the latest firmware?  

do you know what size screws i should get for the back fan?

also would adding a back fan decrease the temps enough to slow down the front one??
what if i used one of those fan speed adapters.. im assuming the fan is just a regular 4 pin pwm connector?
i have a few of those that come with CM fans that are preset to 1800 and 1600 and 1200. altho i think those speeds are set for a 2500 rpm fan, i think its 70% 60% and 50%

I went back and looked all all 4 of my new ones really closely, the ONLY wear and tear I could see is possibly during the QA burn in period, there's very light dust on the edge of the fan, like you'd expect after being run for a day or two at most. 

The PCBs are all 100% clean, no hidden dust in any of the nooks and crannies, no dust inside any of the heatsinks.

I don't believe any of my 4 were used.  I have two more arriving monday, I'll check them closely as well.

Go to metric screws section in Lowes and I think that they are PM 4mm-0.7X45mm in length if you install 38mm fan WITH grill or 40mm in length if no grill or for a 25mm extra fan. I think that they sell 3 in a bag, which is less convenient, but cost is only $1.25/bag.

You guys do realise that its next to impossible to tell whether the units where used or not.

Just because there is no dust, doesn't mean it wasn't used before.
 
They could of kept the miners in a filtered room without dust OR they could of just replaced the heatsinks and fans.