Profitability of D3 Antminer November Batch (21-30 Nov)

[kats2005]

Hi, has anyone else experienced high-temps with D3's from the October batch?

I realise the October units run a higher frequency and hash at 19-21ghz, but even lowing the frequency to 487 so they are the same as the September batch, the chips read 84degrees, where my September units are running 73degrees.

Ambient temperature is below 20degrees.

Stats;

Old Units
Temp(PCB) = 60
Temp (Chip) = 74
Fan = 4,800 (bursts up to 5,010)

New Units (with frequency lowered to 487 to be the same as September batch)
Temp(PCB) = 66
Temp (Chip) = 83
Fan = 5,500 (bursts up to 5,900)

I have raised with Bitmain but no response yet.  I am am experiencing this with all my units, has anyone else experienced this?
All heatsyncs appear to be installed (can't check without breaking the warranty seal, and this is across all my latest units.

You are not alone. I am having the same issues; high Chip temp. Fan goes up 6100 in my case.

Me to. the temp is too high the the fans can't manage cooling the system

[Johninthai]

I lowered frequency to 487. Now hashing rate is 17.5 gh/s stable, temps not above 70, about 7 - 10 HW in 24 hours and fans run at max 4600. My ambient temp of the room is 25 Celcius. So under clocking helped in my case.

[mcan]

Dont buy any BITMAIN poops anymore, they are selling uncontrolled numbers of unit and takes money 3 months in advance . this makes their miners useless when you received after 4 months. if you calculate any BITMAIN products profitability from whattomine , just multiply difficuilty 50 to 100 times to see real difficuilty when you receive your units after 4 months.

[caleb150]

How do you underclock the D3

[Lumining]

How do you underclock the D3

You have to change the frequency. I think the defaullt is about 460 so just lower it in the setting spage and your miner is underclocked

[rjrandy79]

Before I buy 2 pcs of d3 last year i thought that it is the fastest way for someone who wants to become a millionaire. Because of many false advertisement in Facebook. Now I know the meaning of DYOR.