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That heatsink looks cool
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punin do you have any information when you will be able to send chips to the testers that have not received chips yet.
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Feeding external clock with its own dedicated power supply will improove these parameters a lot and will help for more stable work at higher clock speeds if chip allows them. I have prepared one variable for selecting the best frequency and then will use fixed for maximised performance.
And do you feed the clock to multiple chips then? With clock buffers or fanning tree or matched lines? intron I am talking about checking performance of one chip with external clock vs integrated, if it is cost effective depending on the hash rate increase buffers for each chip will be nice.
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Feeding external clock with its own dedicated power supply will improove these parameters a lot and will help for more stable work at higher clock speeds if chip allows them. I have prepared one variable for selecting the best frequency and then will use fixed for maximised performance.
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intron have you tried to increase hash rate with external oscillator or higher voltage or you do not have proper cooling for now.
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I think that Bitfury have sent chips to you by posts they are not fast as couriers so it will take some time.
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intron nice work again, will you share any additional information abouth the chips you will use in these pcb, expecially the power supply . I suppose you are the only one that have chips, once I receive chips will start showing test results too.
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This is not a clever experiment to moove object from cooler to hotter place, it can create condensation, which can lead to shorts and damaged unit.
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--------------- 2. Scrub the extra power connector behind the PCIe and add a IR3897 9A reg there to supply 4 of the end chips. This would cost a bit extra for parts - rough guess, about $5 maybe. --------------
+1, 4 chips x 2A = 8A and we will drive IR3897 at 88% load. Can we just solve one problem and create another? Do we need powerful reg? BKK please consider adding the appropriate reg later on. 10X 88% of load is too much, personally I will not load voltage regulator with more than 70%, ye we all think of the lower cost, lower space but adding some regulators for 10$ more will help a lot in safety and reliability, this change will increase price of the product with arround 5% which is funny.
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Adding additional voltage regulators will help not only for the overclock but for more stable work, lower noise psu, lower temperatures, if you make board 12X12 this will help also about cooling, cause the most produced fans are with this size, now stocking a quallity 10cm fan is hard.
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We will start sending chips beginning of next week. Probably Monday. I will try to give more detailed info about this tomorrow.
Great news
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Guess since it works they won't be sending any chips.
bitfury is a serious man, he said that he will send chips to some developers fast and then he will contact the others that want to participate in the test and will send chips to them by slower mail I am shure that he will send chip to us, me and some of the forum members have invested in expensive power supply boards, variablle oscillators and other parts needed for the test .
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Great job bitfury chip performs really well do to your measurments.
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<nightyj>;<62>;5.27; <16nahHb3f39yy8Ru7WSq2XMcUK97w7LL4q> , с предишните общо стават 94 чипа.
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Power consumption feeding it with different voltages (unprogrammed and no clock).
[14.06.13, 20:19:00] Niko: 0.5V = 0.03A [14.06.13, 20:21:14] Niko: 0.55V = 0.04A [14.06.13, 20:21:38] Niko: 0.597V = 0.06A [14.06.13, 20:22:14] Niko: 0.698V = 0.11A [14.06.13, 20:22:29] Niko: 0.75V = 0.15A [14.06.13, 20:22:51] Niko: 0.79V = 0.19A [14.06.13, 20:21:56] Niko: 0.65V = 0.08A [14.06.13, 20:23:16] Niko: 0.85V = 0.29A [14.06.13, 20:23:35] Niko: 0.9V = 0.40A [14.06.13, 20:25:11] Niko: 0.95V = 0.60A..
Now we'll do most important, we'll try to see clock, then we'll try to hash on 0.6 V... I think 1 W / GH/s is easy target for us, very easy :-) Do you see relationship in unprogrammed state ? ;-) So if it computes correctly - then it will beat power limit definitely :-)
Bitbet left only 6 hours as I write this. If chip will work but bitbet would reject proof - those who put bet on YES I'll pay myself. If we'll make however test earlier than 6 hours - but bitbet would reject proof - that's their reputation issue and not ours. As actually we have no fears, this result will be re-verified multiple times and overall costs involved are MUCH higher than those bet value :-) So no sense to lie just to win bet :-))) Already flight to Taiwan and organizing test had quite significant costs :-))))
That`s are really great values, I hope internal clock is working great too. Nice pcb`s intron, that was fast delivery
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