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Topic: [ANN] Technobit HEX8A1 -240 GHs Coincraft A1 board- Finished production - page 39. (Read 72425 times)

full member
Activity: 237
Merit: 100
Yeah i wanna know this too.

Marto are the 30x pre-production units ready to ship on Monday 10th Feb?

I've got 2 in that batch. Hoping no delays this time!

If you put them in the same box you can keep the extra shipping fee. Cheesy

hero member
Activity: 490
Merit: 500
Marto are the 30x pre-production units ready to ship on Monday 10th Feb?

I've got 2 in that batch. Hoping no delays this time!

If you put them in the same box you can keep the extra shipping fee for getting them out on time! Cheesy
full member
Activity: 237
Merit: 100
Marto please answer to my friend ^^

@Marto74

(1) I would like to ask for a refund for my order that is more than 2 months old now.
Order reference: UICAWGFJD

OR I would like to get a HEX8A1 card as a form of consolation Smiley

(2) Why don't you react to messages sent to technobit.eu?

Best regards,
  W
newbie
Activity: 6
Merit: 0
End of FEB batch is sold out

We are starting sales of mid March delivery batch for 999 per board

WAUW!!! Nice job you did there marto74!!
Can I change my standing orders (JJNYCJKCH & LDEMCMKSE) as they haven't been shipped yet, into 1 of these HEX8A1 Coincraft A1 boards with UPS shipment?

The difference of the 2 orders will be in your benefit Smiley!

full member
Activity: 163
Merit: 100
Hi Marto

I have already chips. You offer assembly only? Thx
hero member
Activity: 728
Merit: 500
End of FEB batch is sold out

We are starting sales of mid March delivery batch for 999 per board
newbie
Activity: 37
Merit: 0
@Marto74

(1) I would like to ask for a refund for my order that is more than 2 months old now.
Order reference: UICAWGFJD

OR I would like to get a HEX8A1 card as a form of consolation Smiley

(2) Why don't you react to messages sent to technobit.eu?

Best regards,
  W
full member
Activity: 237
Merit: 100
hero member
Activity: 490
Merit: 500
The first prototype with one direction of both heatsinks do not have enough surface for the top.
So we had to switch, sorry Gator

Another reason for aligning the heatsinks in the same direction, not just that I like it that way, data centers who will want to run them in 4U rack cases would also need it that way too. They blow air in one side of the case and out the other side.
True, But this works only in case. In open air as boards are it is useless. In the case you can force air to flow.
For the data centers i am sure that they will approach marto and he will do as requested Wink

Look you cannot stack them like this...



...because you will have two fans back to back sucking the life out of each other!

So you need to stack them on their side like this...



...but with the "bottom" heatsink pointing the wrong way, half of the air is going into the desk, the other half will be blowing into the miner above.

So I still think both heastinks need to run along the length of the board then you can stack them along their edge and cable tie the stack together.

If you have a problem with too much static pressure creating an air curtain over the bottom heatsink, taller heatsinks, or 2x half speed fans on the top, or even a sheet of plastic/metal/wood sticking out of both ends, should solve it. Stacking them on their side also helps solve this problem too as the air curtain isn't over another miner.
legendary
Activity: 1610
Merit: 1000
A few question for Loshia and Marto:
#1 Its possible to ship it out on 10. feb?
#2 Can you say me a configuration for cgminer? Is there something like this: --hexminer8-options x,x,x ?

Thanks!
First question is for marto
about second one:

--hexminer8-set-diff-to-one 1 --hexminer8-chip-mask 255 --hexminer8-voltage 955 --hexminer8-options 8:240

One by one


--hexminer8-set-diff-to-one  1/0
the diff when set to 1 like mine - am testing it now brings a lot pressure between UB-HOST and PIC/ASIC communication

Coin crafts can filter their response based on difficulty configured. When you set to one you got all nonces match diff 1 which has to be filtered and not send to the pool amusing you mine at diff greater than one. The only real advantage setting it to one is the cgminer 5 secs stats not moving up/down like crazy and average stats are settling down more quickly.


Assume that you mine at diff 128.
Cgminer sets it individually for each work passed to asic so it stays in sync with your pool always. Even if it is 1!

When you set it to zero - ASIC send to the pic only nonces matching the diff 128 and back to host so you have about 128 times less data transfer, and cgminer shorts the time for submitting the nonce not checking against pool diff Wink if it is a HW and all nasty stuff inside. the only disadvantage is that each nonce is counted not as one like before but as work difficulty itself which causes the stats variation. I suggest to use  --hexminer8-set-diff-to-one 0 and configure your worker to mine at some constant higher difficulty. for instance when btcguild changes difficulty some old work may become stale oldddiff even though it is valid. In general if you happen to be in between two pools difficulties and your pool changing it up and down frequently you can have higher pool reject ratio - not good

--hexminer8-chip-mask 255 - this was for development you can enable/disable chips based on binary mask bin 11111111 - 255 dec all chips enabled. Obviously zero is not a good choice here Grin
--hexminer8-voltage 955 the core voltage in milivolts. Do not go above one volt 1000 Smiley or do it on your risk
--hexminer8-options 8:240

8 is chip count - used for some internal usb timing calculations , 240 is the frequency. The actual chip frequency is multiplied by four so 240 means 880 actually. the maximum value as far as know is 275. But try to stay below 260 in general
And finally use --quiet when you have seen enough of course Smiley
full member
Activity: 237
Merit: 100
A few question for Loshia and Marto:
#1 Its possible to ship it out on 10. feb?
#2 Can you say me a configuration for cgminer? Is there something like this: --hexminer8-options x,x,x ?

Thanks!
legendary
Activity: 1610
Merit: 1000
The first prototype with one direction of both heatsinks do not have enough surface for the top.
So we had to switch, sorry Gator

Another reason for aligning the heatsinks in the same direction, not just that I like it that way, data centers who will want to run them in 4U rack cases would also need it that way too. They blow air in one side of the case and out the other side.
True, But this works only in case. In open air as boards are it is useless. In the case you can force air to flow.
For the data centers i am sure that they will approach marto and he will do as requested Wink
hero member
Activity: 490
Merit: 500
The first prototype with one direction of both heatsinks do not have enough surface for the top.
So we had to switch, sorry Gator

Another reason for aligning the heatsinks in the same direction, not just that I like it that way, data centers who will want to run them in 4U rack cases would also need it that way too. They blow air in one side of the case and out the other side.
legendary
Activity: 1610
Merit: 1000
As for power Ioshia's rough numbers are about 36-40A for 240-260GH

36A x 12V = 432W
40A x 12V = 480W

Soooo.... it don't look like I'll be selling my 6x Bitfury Hex16B's = 270GH/415W just yet!
Do not even think about it. There is nothing better in terms of power that i have touched Wink
hero member
Activity: 490
Merit: 500
Pretty quiet about the power consumption...
Yes in fact it is. So to give you a clue as far as i know two miners with extreme OC do crash 850 W PSU rated about 73 A on 12 V
It turns out that there are peaks with 35Amps+ per board in order to crash PSU or PSU is just crappy.
I will have my PSU today 55Amps on 12V for a single miner and give it a shot i guess it will not crash with just one miner
As i predicted some time ago they eat power for sure. I will try to find power meter and give yo exact numbers But if you want 250GH+ make sure you can provide - peak power 40Amps for a board. Carefully chosen PSU 650W-700W should be fine. The bottom line will be 600W but i am not risking just to save a couple of bugs
i am talking about 12V at the wall add between 10-20 % on top EU/US (220V/110V) PSU efficiency and so on
Have in mind that marto's chips are samples from zefir as far as i know and there is a rumor that later they will re page the chips with thick wires inside which will improve efficiency

Okay Ioshia's gave us some clues on power here, about 35-40A for 240-260GH, okay so that works out as...

240GH @ 35A x 12V = 420W
250GH @ 40A x 12V = 480W

Assuming that's right and it's 5A for every 10GH going forward from this point...

280GH @ 55A x 12V = 660W!

When I get my hands on one I'll stick a power meter over it and post more accurate numbers.

Buuuut.... it sounds far away from 1GH/1W and so it doesn't look like I'll be selling my 6x Bitfury Hex16B's (270GH/415W) just yet!
legendary
Activity: 1610
Merit: 1000
Some more speed updates as promised Grin

I got it 250GH stable!!! Some things to note:

cgminer clock is set to 250. To find out actual ASIC clock you have to multiply by 4x250 = 1000. In theory I have 8 chips , 32 cores each 1000 clock which equals to 8*32*1000=256000 or 256 GH. You will ask where are my 6 GH. So bad news I got 5 dead cores/engines which does not bother me much. That are the chips received from the factory and I can not do much about it.
./cgminer-api stats | grep engines
   [Chip1 Engines] => 32
   [Chip2 Engines] => 29
   [Chip3 Engines] => 32
   [Chip4 Engines] => 32
   [Chip5 Engines] => 31
   [Chip6 Engines] => 32
   [Chip7 Engines] => 31
   [Chip8 Engines] => 32
  
So I should be getting in theory 251 GH so basically I am there!!

More good news – the max clock rate should be 275*4 = 1100. I am not feeling like I will push it to the limits but I can tell you that all of you shall be getting around 260 GH. Have in mind cooling is very important. I am lucky because it is winter now and my room temp is around 10C. I know that up to 20-22 C is ok.
More Updates to come tplink and cgminer options



legendary
Activity: 1610
Merit: 1000
when will more pcs be available?
Next week when boards start to ship if guys took them and post them here Cheesy
legendary
Activity: 2242
Merit: 1057
when will more pcs be available?
legendary
Activity: 1190
Merit: 1000
Please use high speed fans on these devices. I have put my miners in the basement so the noise does not bother me, but I will need them to run cool and fast in the summer (I do not know how hot the basement is going to get).

Also, I'd rather get my miner as soon as possible than wait for the fans or finger guards or whatever (I can buy those items in my local electronics store).

marto already confirm that the miner will come with super 4500 rpm SUNON FAN  Grin
full member
Activity: 126
Merit: 100
Please use high speed fans on these devices. I have put my miners in the basement so the noise does not bother me, but I will need them to run cool and fast in the summer (I do not know how hot the basement is going to get).

Also, I'd rather get my miner as soon as possible than wait for the fans or finger guards or whatever (I can buy those items in my local electronics store).
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