Quote from: driksson on July 18, 2013, 12:34:31 PM

Quote from: SebastianJu on July 18, 2013, 12:26:15 PM

Quote from: burnin on July 18, 2013, 01:10:10 AM

afaik the klondike is even more susceptible to this because all 16 chips are organized in one chain.

Are you sure about this? Im pretty sure BKKCoins wrote that he changed this. So that the board can run with one chip alone too. If chips break all other chips remain working. But i might misunderstood this.

I think that all boards basically support running on only one chip, thats how they were able to test them without receiving all sample chips in the beginning. But, if you add chips after, then they become part of the natural chain and delivers together. (thus breaking the chain if one breaks before a working chip).
Also, the percentages of broken chips should be very low.

My bad, must have overlooked that bkkcoin now also has also 2 chains.

Quote from: SebastianJu on July 18, 2013, 12:26:15 PM

I thought the overclocking test was done with a fully assembled board and the production voltage regulator. So is it possible to run a bitburner XX at 450MHz and 1.3V?

Yes, the test was done with the fully populated (20 Chips) board.
Regarding the switcher:
The semiconductors are designed for 80Amps output current, but the inductors only for 60Amps.
And as long as those don't exceed their maximum temperature everything is fine, i measured their surface at 60°C at 94 Watts Input.
(The limit being 125°C)

Quote from: fiktionist on July 18, 2013, 02:54:17 PM

the avalon datasheet stats 2^32-1 as maximum clockrate.

Correct, 450Mhz is not the end of the line.

Quote from: dani on July 18, 2013, 07:32:05 AM

1.8V - nice!
Are the fans regulated by temperature/cgminer? Will they cost extra? (I guess they are included in the stacking kit).
Can you give some datasheets about the voltage regulator? I want to use one bitburner to push the chips to their maximum, with sufficient cooling. I'm talking about 450mhz+ and as much voltage as needed. This should be fun (don't worry, I won't complain if it breaks though Cheesy

). Also can you just resolder a bigger voltage regulator by hand and overclock even more this way? Can you deactivate One row of chips? This way you could go for pertty much insane clocks and voltages and if anything breaks you can go back to a safer value and use the other 10 chip row Cool

Yesterday the first chinese chip-preorder guys received their chips, so we should see some chips outside of china in the next two weeks hopefully. Prepare for massive impact Cool

Applying 1.8V will definitely kill the chips, 1.4-1.5V could be feasible though.
Fans are included in the "all inclusive" package.
Each row of chips can be shut down individually by the firmware, I might do a max clock test with a single row.
You'd need to flash a custom firmware to do that.