Quote from: praeluceo on October 16, 2014, 05:21:57 PM

Quote from: bspurloc on October 16, 2014, 04:56:26 PM

Quote from: Xian01 on October 16, 2014, 02:52:04 AM

Quote from: bspurloc on October 15, 2014, 08:14:48 PM

Man I hate these 2 S3's I have that wont mine at 500gh/s.
I put them at 250 and they mine at 470ish, put them at 243 and they mine at 492.

You think that's bad ? You could be a batch 1 buyer that had 50% of his units unable to perform stably at 218.75mhz.

Have 3 units that can only run stably at 212.5mhz. Plan on getting around to re-pasting them in the near future to see if I can't improve things.

Ask me how annoyed I am. Especially when I emailed Bitmain early on in the S3 process and they assured me they would not be updating the S3's in the future to resolve the performance problems... And lo-and-behold the S3+ arrives a month later.

Don't get me wrong, I'm a huge fan of Bitmain, and more than 50% of my hash power comes from their devices, but the S3 launch did not go as well as the S1 launch, it appears the S4 launch (Don't own one) has been problematic, and given anecdotes I'm reading here, seems the community consensus is confirming my gut-feel: Bitmain is losing it's way Sad

Funny that I'm thinking of circling back to AsicMiner products for my next miner purchase...

That is why I have been trying to stay away from the inital batches!!

The C1's however.... 1th/s 1BTC seems fair, 800watts.... makes those s2 2th/s way too much money of course.

For kicks, I threw the C1 into my spreadsheet, I get 1.048 BTC shipped to my mining facility in the USA. This does not include a PSU (which I don't include in my other calculations, which slightly inflates the relative cost of the S4 & S2) or the water pump. Assuming a customer buys the water pump Bitmain recommends (which you'd be dumb not to), it's $50 (let's call it 0.13 BTC today). The end result in BTC/TH is:

Block Erupter Tube (10x):   0.9875
Block Erupter Prisma (10x):   1.0642857143
Antminer S3+ (10x):      1.2682119205
Antminer S4 (1x):      1.8475
Antminer C1 (1x):      1.178
S2 Used (1x):         0.9484897125

So yes, the C1 is cheaper than the S4, and even the S3, but still not as cheap as the Prisma, and requires a considerably more involved setup, with higher risk of failure. I might get one for the novelty, and as hashrates increase air-cooling may end up being insufficient to be competitive, but at the moment, air-cooled hardware is still more competitive on a BTC/GH ratio, but not on a GH/Watt ratio (but how much power do the pump and fans draw for that TH? That may tip it back in favor of the Prisma).

It's intriguing, but having seen Cointerras in action, I'm not entirely excited about the prospect.

they are saying 70amps on 12 votls or 840watts... so $50 for pump etc and $100+ for power supply + $100+ s/h