Bitmain also offered me an S5, no strings attached. So here is my initial review.

Setup was easy. Plug it in and turn it on. DHCP grabs an IP address. My router identified it as "antMiner". Hit the IP with the browser and configure the web interface for pool credentials. Username and password to get into the web interface were root and root.

This new S5 is not quiet. The 120mm, 4200 rpm fan is loud. But sitting in a 40c room, the ASIC temps are reporting 62c, so it's looking nice and cool.

After running for an hour, it settled into:

Miner Speed: 1155 GH/s
BTCGuild Speed: 1145 GH/s
Power: 675 W (750 W Bronze PSU)

Power consumption is a little high due to the cheap Bronze PSU. Switching to my Platinum PSU should reach the advertised 590 W.

Initial opinion: Good efficiency, easy setup, meets advertised specs.

After some further testing I'll offer a comparison with the SP20.

When you say it is loud, is it louder than an S3 or quieter? Thanks for your quick review.

server psus and cables.....  Similar to SP20 draw per cable? I wonder if anybody has taken any readings yet. 

Okay just got back home from a party. I need to find a few other fans.

 at freq 250 I do 824 gh and 404 watts that comes to .49 watts per gh.

 I bounce to 416 watts which is .504  watts per gh this is good.

It will run too hot with my current fan setup if I go above freq 250. temps are 60c and 57 c

It is too  loud stock!  it runs hot at stock speed with stock fan. stock fan ramps to 3800 rpm and temps were over 60c for each board.



 if you want db's 75 plus it is a nasty  pitch.

my complaint is really simple here 2 silverstone 140's would allow it to run max speed and quiet. A no brainer 1 minute mod.  instead I will need to fuck around with it.

If noise does not matter run it stock.  It is louder then the s1 or the s3 it is as loud as the asic miner tube.  So far at 225 ,250, 275, 300  and stock 350 it scales close to .51 or .52 watts

per gh. I am looking at the stock fan and it is a bizarre fan.  It is 38 mm yet has 1 inch deep blades I have never seen a fan like this. I have to go back and correct part of the review.

3 shots of the  my wife will kill me sounding  stock fan.  it has 38mm depth with 25mm blades then 13mm focus grill. it was pushing 3800 rpm at freq 350 worse sound of any fan I ever use for a miner.

WOW! Loud.

Interesting.

Thanks for the information. Does that mean by comparison the SP20 is quieter?

I understand you're imitating our marketing techniques, but why did you copy the miner loudness ?