Re: ANTMINER S3 Discussion and Support Thread.

Quote from: jamesc760 on July 22, 2014, 06:01:50 PM

I have two S3's, received last Friday. One of them hashes at 440GHs at stock speed (218.5), so I'm fine with it; however, the other hashes at 400 GHs at stock. I've been trying different things like putting it on a different psu's like ATX, Dell/HP server, but nothing helped. I'm taking notes on different clock speeds on this one:

Frequency GHS(avg) Temps HW Watt (Kill-A-Watt) ASIC Status
---------- ---------- ------- -------- ------------------ ----------------------
250 487.26 41, 41 2 428 Chain#2, 1 "x" on the far right
237.5 423.55 39, 37 38 367 All OK
225 422.69 39,36 7 364 Chain#2, 1 "x" at 2nd position & 1 "-" at 8th position from left
218.75 403.58 40, 38 0 355 All Ok

After editing the asic-freq file, a reboot command was issued. All readings were take at 30 minute mark. PSU is a Dell Server Power Supply 750W. All 4 PCI-E cables are plugged in, even at stock frequency.

Yes, it took me over 2 hours to finish writing this post. Grin

I'm setting the frequency at 250, seems to be the sweet spot for this S3.

At what frequency would you run this at? Why?

At 218.75 freq you are getting 1.136845 GH per Watt
At 250.00 freq you are getting 1.138457 GH per Watt

Looks like it is slightly more efficient at the higher clock speed, but 30 minutes is not a sufficient test. I'd keep an eye on hash rate, temps and errors for the next few days.

Thanks for sharing

Edit:
Here is an easy calculator to figure out your HW Error %:

http://www.coincadence.com/antminer-s1-hardware-error/

(was built for S1, but works the same for S3...