Quote from: user27 on July 28, 2014, 08:39:35 AM

Quote from: Phoenix1969 on July 27, 2014, 04:58:00 PM

1450w stock settings 5 cubes or 1 whole neptune 3.45Th/s

Are you *always* stoned? Is that it?

The above is exceptionally optimistic; if your cubes run stable on the stock 475Mhz then you're looking at 0.65TH per cube. Most people are able to get 0.7TH per cube by dialing in the clocks and voltages (very simple to do in stock web interface).

The chips run at around 300w each but that's at 0.7v after VRM's which add around 20% inefficiency; so you're going to be pulling around 1800w from your 12v supply. With a half decent PSU you're looking at 1900w at the wall for 3.25TH = 0.58 w/gh or with minimal tweaking 2000w at wall for 3.5TH = 0.57 w/gh.

That's if KfC don't screw you with dead dies that they refuse to RMA and your PCI-e plugs/cables don't melt.

u27

grrr

usually reads slightly better on 3 hour actually
2 Neptunes, so /2...... all our dies work, ALL OF THEM. Totally stock.
No cube has ever been opened, and no alterations on the Advanced page at all.
No PCI plugs are altered in any way. The Corsairs came with 16awg pci cables.
The room they are in is VERY HOT. It's a power closet for solar, and stays 100F in there Without Neptunes at all.
With the neptunes, it's obviously even hotter, and I had to bypass the solar exhaust fan's power leads, and connected it directly to a Corsair pci lead, so it's on all the time instead of just on during the day. It is low cfm, but roof venting is effective. It's a mess in there...
https://www.youtube.com/watch?v=_T2mziEZ42U

They did have dead dies initially, but rebooting one machine at a time fixes that for us.
We also use 220v... coming from 6000watt solar banks don't know if that matters other than for efficiency...
I'll see if I can get my brother to borrow the kill-o-watt reader again
Even though its connected to solar, we have grid backup(Net Metering)... and even with that, when the house air-con (totally separate circuit) kicks on, it totally wreaks havoc with the Neptunes, and Sometimes causes a cgminer re-start and dead dies. When/if that happens, we re-boot one machine at a time, and all comes back. Don't really know how to remedy this without a totally separate main line. I never would have guessed that the aircon would be able to do that from a separate breaker, especially since the inverters are 6000watt each. sometimes the aircon breaker pops, sometimes it doesn't. It never used to before the Neppies arrived. Not sure if we want to add two more of these when the "Bonus" units ship.
*all the VRM temp readings on the GUI pages are about 95-100+C , while all the asics read to be around 60-70C

...and the 2 Neptune's circuit at the box

15.65 x 220v = 3443 /2 = 1721watts for each Neptune "At the wall"
pretty close for horseshoes and hand-gernades
3.4+ th/s each, so 3400/1721 is 1.9+Gh/s per watt or .506 watt/Gh/s ... "right out of the box"
Now who's "stoned"? That's figuring at 3.4, and it's actually a bit better, as you see here.
Your 2000 watt .57watt/gh/s sounds like you may have power delivery problems to me, I can't be that "lucky"