Quote from: J4bberwock on May 08, 2014, 07:57:06 PM

Quote from: racebyu on May 08, 2014, 02:43:04 AM

Quote from: J4bberwock on May 07, 2014, 11:55:57 AM

Quote from: Blisk on May 07, 2014, 10:03:07 AM

Quote from: J4bberwock on May 07, 2014, 08:52:04 AM

Quote from: Blisk on May 07, 2014, 08:03:20 AM

Did anyone check if these companies which sell those scrypt machines use the same chips or not?
I think they do. And if they can buy it, we can do it also.
How hard is to made miner like that when you get chips, using directly raspberry pi on it.

you still need the firmware to communicate with the chips.
The electronic part can be done, but might not worth it if you only plan to do a few.

http://www.innosilicon.com/A2.htm

200$ each chip if you order 50 pieces
roughly 10000$ = the actual price for the complete miner with 48 chips

these chips are too expencive and I am soure you can get cheapper one.
And if more people takes it we get discount also.

We need to search cheapper chips

I do not think Gridseed will make these chips anymore as they did sign a
deal with innosilicon

Gridseed GC3355 chips would cost nothing to buy now. Could worth the try, plus the firmware and the design to be improved already exists.
It all depends if they sell the chips and if they sell for really cheap.
They aren't that power hungry to move 28nm now. simply marketing.

I do not think that Gridseed will continue to manufacture the 3355 chips as they
could be signing a deal with Innosilicon to manufacture the A2 chips themselves now.
Good move on both parties as if they can ramp up production at both ends they
will take out most of the late to market competition.

If you can get 4Ghs out of 40 chips but draw approx 300w of power you would
only be able to obtain 20Ghs max on a 115vac@15amp service outlet. That is
getting the max (1750w) of a standard wall outlet, you are putting out 1500 watts.
The volt mod with higher freq settings pushing the chips really drives up the power
consumption.

These units are the first version on the ASIC Script miners and will draw the most
power thus making them not efficient enough as higher power miners. That being
said I have seen some company putting 6 stock freq units into a custom rack and
selling as a 33Ghs unit drawing 840 watts but price was way to high and around the
same price of a newer 28nm 90Mhs miners using the A2 chips.

Good work to everyone inputing into this thread, I am going to mod my Blade soon
with the knowledge in this thread. Next round of blades coming out next week are in
the $900 range now!!

your power usage looks way off.

My blade running overvolted at 7.2MH/s uses around 300w from the wall
5.8MH uses 170 watt from the wall (30 watt just for the psu at idle nothing plugged)

we should be able to reach around 56MH with 1500 watt
price for this have to be no more than 800$ for 14MH to be competitive,
flexible design by multiples of 14MH (200 chips) up to 42MH 1200 watt to easily power it with server PSU like the DL580G3 1300 watt (noisy but efficient)

Made a mistake in my calculation as for one board only.
I estimated that a overclocked Blade mining at 8Mhs (2 boards) might draw around 300 watts.
At that power draw you could only mine at 40Mhs and 1500 watts.
As per your spec of 7.2Mhs per Blade at 300 watt your only going to get max 36Mhs per 15A outlet
if you overclocked the boards.

The problem is once you overclock them the rise in power draw is greater then the performance increase
that you are getting out of the chip.

What is the max number of chips that you can address with the current logic on the board?
Did Gridsed limit to 40 per board due to bandwidth?