[ANN] Technobit HEX8A1 -240 GHs Coincraft A1 board- Finished production - page 20.

Gator-hex

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Quote from: pidge on March 10, 2014, 06:34:22 AM

Got my two HEX8A1's today. Have immediately swapped the fans on each for 3 x Arctic Cooling F9 and with a fan speed controller to keep them a bit quiter.

I've got a pair of WR703N's flashed up with the firmware, and I've got one HEX8A1 up and hashing just fine (at 200/900 to reduce the heat output, 0 errors after 20 odd minutes) and warm. Very warm!

Using a FSP Raider 650W for the PSU - inexpensive, and the miner only 50% loads the PSU.

What I'd like to see:
- Larger PCB
- Pairs(?) of Coin Craft ASICs with Copper heat spreader shim, with mounting holes to allow for CPU heatsink / water block mounting option
- Larger stock Heatsinks, for 2 x 120mm fans in push/pull cross-flow configuration, sort of like the Antminer S1
- Configurable temperature based work throttling and shutdown.

Dreams are free, right?

These A1 chips are awkward to add cooling to because they're in a 30% top 70% bottom package so I don't think we'll ever see a standard CPU cooler on them like KnC/HashFast use because they are 100% top cooling package.

On the Hex8A1-260 there's a flat space under the heatsink (4.8cmx10cm) where you could add some additional cooling if you wanted to.

Gator-hex

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Activity: 490

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Quote from: foobar31 on March 10, 2014, 05:54:50 AM

@marto

I was wondering if your A1 based board implements a sort of emergency shutdown ?
The use case might be when the board is going too hot, because of an internal issue or because of a fan running slowly for instance.

If not, that would be a good feature (together with regulated fan speed) to implement in the next generation Wink

If your board has poly-fuses on, it has that, that's what those ugly yellow/orange/brown tags do.

pidge

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Activity: 101

Merit: 10

Got my two HEX8A1's today. Have immediately swapped the fans on each for 3 x Arctic Cooling F9 and with a fan speed controller to keep them a bit quiter.

I've got a pair of WR703N's flashed up with the firmware, and I've got one HEX8A1 up and hashing just fine (at 200/900 to reduce the heat output, 0 errors after 20 odd minutes) and warm. Very warm!

Using a FSP Raider 650W for the PSU - inexpensive, and the miner only 50% loads the PSU.

What I'd like to see:
- Larger PCB
- Pairs(?) of Coin Craft ASICs with Copper heat spreader shim, with mounting holes to allow for CPU heatsink / water block mounting option
- Larger stock Heatsinks, for 2 x 120mm fans in push/pull cross-flow configuration, sort of like the Antminer S1
- Configurable temperature based work throttling and shutdown.

Dreams are free, right?

foobar31

newbie

Activity: 15

Merit: 0

@marto

I was wondering if your A1 based board implements a sort of emergency shutdown ?
The use case might be when the board is going too hot, because of an internal issue or because of a fan running slowly for instance.

If not, that would be a good feature (together with regulated fan speed) to implement in the next generation Wink

marto74

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Activity: 728

Merit: 500

10x
Gator
fixed

Gator-hex

hero member

Activity: 490

Merit: 500

Quote from: eestimees on March 08, 2014, 02:41:39 AM

jep, it's strange all of them are loose/broken.. I'd underestand one or two, but even those that are under the sink...

I noticed the Technobit web site now has an Returns system: http://technobit.eu/index.php?id_category=14&controller=category&id_lang=1

Marto, whoever edits your website, they spelled "Repair" wrong multiple times! Wink

askhimthatsoon

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Quote from: loshia on March 09, 2014, 08:19:05 AM

Quote from: askhimthatsoon on March 09, 2014, 08:06:37 AM

Quote from: loshia on March 09, 2014, 06:53:58 AM

Hey,
Have in mind that even connected to separate rails most probably same would happen
Watch psu stamp. In two rails psu it says rail 1 up to x amps and rail to up to x amps but combined up to y amps Wink

and y is lower than hex8 consumption

Thanks, I checked the label again it says: 12V1+12V2 720W max, 3.3V+5V 140W max, combined 750W max. I opened the case and checked the rails, molex connectors and sata power 12V was on the second rail. Tried those with a dual molex->pcie power adapter as well as one of the built in pcie power connectors together => It happened anyways.

I guess I'll accept the status quo as the miner runs rock solid with clock of 255 and 980mV.

So it turns out that psu is just a crappy one. 720w is 60 amps at 12 v rails. My 850w corsairs are rated at 60 amps Wink

too much psu marketing I guess. Do you have something else connected to this psu?
Or just hex8 board?
Ps: it sounds like your psu is 550w sold as 750w
Just kidding though Wink

There is nothing else on the psu => Yep, the PSU is crap. It was also very cheap (43 Euro), I guess I got what I asked for...

loshia

legendary

Activity: 1610

Merit: 1000

Quote from: askhimthatsoon on March 09, 2014, 08:06:37 AM

Quote from: loshia on March 09, 2014, 06:53:58 AM

Hey,
Have in mind that even connected to separate rails most probably same would happen
Watch psu stamp. In two rails psu it says rail 1 up to x amps and rail to up to x amps but combined up to y amps Wink

and y is lower than hex8 consumption

Thanks, I checked the label again it says: 12V1+12V2 720W max, 3.3V+5V 140W max, combined 750W max. I opened the case and checked the rails, molex connectors and sata power 12V was on the second rail. Tried those with a dual molex->pcie power adapter as well as one of the built in pcie power connectors together => It happened anyways.

I guess I'll accept the status quo as the miner runs rock solid with clock of 255 and 980mV.

So it turns out that psu is just a crappy one. 720w is 60 amps at 12 v rails. My 850w corsairs are rated at 60 amps Wink

too much psu marketing I guess. Do you have something else connected to this psu?
Or just hex8 board?
Ps: it sounds like your psu is 550w sold as 750w
Just kidding though Wink

askhimthatsoon

newbie

Activity: 15

Merit: 0

Quote from: loshia on March 09, 2014, 06:53:58 AM

Hey,
Have in mind that even connected to separate rails most probably same would happen
Watch psu stamp. In two rails psu it says rail 1 up to x amps and rail to up to x amps but combined up to y amps Wink

and y is lower than hex8 consumption

Thanks, I checked the label again it says: 12V1+12V2 720W max, 3.3V+5V 140W max, combined 750W max. I opened the case and checked the rails, molex connectors and sata power 12V was on the second rail. Tried those with a dual molex->pcie power adapter as well as one of the built in pcie power connectors together => It happened anyways.

I guess I'll accept the status quo as the miner runs rock solid with clock of 255 and 980mV.

loshia

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Activity: 1610

Merit: 1000

Quote from: askhimthatsoon on March 09, 2014, 05:27:51 AM

Quote from: Zich on March 08, 2014, 08:35:54 PM

You said "El cheapo CP 750 Plus PSU. The label says 2*12V rails with 30A=720W", clearly you see the 720W not the limit 30A per rail.

About OCZ 550W, i don't know which type you use.
OCZ Fatal1ty 550W is 2 rail, max 25 A per rail which clearly will overload

OCZ ZS 550W is single rail, max 38 A & OCZ ZT 550W is single rail, max 45 A should do the job

You are right, I saw the 720W, because I didn't expect the two PCIe power connectors to be connected to the same voltage regulator, which seems to be the case.

The OCZ was a ZS. May it rest in peace. No clue why that happened.

Hey,
Have in mind that even connected to separate rails most probably same would happen
Watch psu stamp. In two rails psu it says rail 1 up to x amps and rail to up to x amps but combined up to y amps Wink

and y is lower than hex8 consumption

askhimthatsoon

newbie

Activity: 15

Merit: 0

Quote from: Zich on March 08, 2014, 08:35:54 PM

You said "El cheapo CP 750 Plus PSU. The label says 2*12V rails with 30A=720W", clearly you see the 720W not the limit 30A per rail.

About OCZ 550W, i don't know which type you use.
OCZ Fatal1ty 550W is 2 rail, max 25 A per rail which clearly will overload

OCZ ZS 550W is single rail, max 38 A & OCZ ZT 550W is single rail, max 45 A should do the job

You are right, I saw the 720W, because I didn't expect the two PCIe power connectors to be connected to the same voltage regulator, which seems to be the case.

The OCZ was a ZS. May it rest in peace. No clue why that happened.

marto74

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mini on all hex

QuiveringGibbage

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http://idontALT.com

Mini-USB connectors on these board? or standard?

Cheers,
QG

marto74

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Activity: 728

Merit: 500

Technobit HEX boards family simple setup guide
http://www.megafileupload.com/en/file/506573/TECHNOBIT-HEX16--Setup-pdf.html

Zich

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Activity: 1190

Merit: 1000

Quote from: Gator-hex on March 08, 2014, 08:23:50 PM

Quote from: marto74 on March 08, 2014, 09:14:02 AM

actualy already made this but with some other changes in components

Is there anywhere else on the board we can solder these legs to Marto? When they come off they take the circuit board contract with them so they cannot be soldered back to their original place. Zich's solution of soldering to the nearest good leg wont work for someone with Eestimee's problem where all the poly-fuses have a bad left leg. Maybe if you fix Eestimee's board you can take a photo to show us what you did? Thanks.

Agree, i would love to see the via Grin

I already try measure with connectivity but not found any near smd capacitor.

Zich

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Quote from: askhimthatsoon on March 08, 2014, 07:09:40 PM

I got my HEX8A1 to operate this morning, but it was an adventure:

* Tried OZC 550w PSU yesterday, default settings: 260 clock,1000mV => Miner started hashing but as soon as I checked hashrate in terminal (next room) I saw it already disabled itself. Went back to the PSU, HEX8A1 is off. PSU is dead.
* Next try: El cheapo CP 750 Plus PSU. The label says 2*12V rails with 30A each = 720W. I used only the 2 PCI-e power cords, no other load. I tried default settings again. Miner hashes, with very high hashrate (way over 260GHs) but after 20 minutes, PSU switched off. PSU in failsafe mode.
* Couple of additional tries ending with PSU switching off.
* Here is what finally worked (stable for a few hours now): 255 clock, 980mV. Results in fairly stable 260.5GHs. I didn't measure the actual power draw at the wall yet, but I am scared already.

Why did you test your board with try & error method?

The PSU clearly had specification about 12V rail, how many rail & what is maximum amp per rail.
I already post the HEX8 consumption on 260/1000 setting, it's 33 A on 12V rail.

You said "El cheapo CP 750 Plus PSU. The label says 2*12V rails with 30A=720W", clearly you see the 720W not the limit 30A per rail.

About OCZ 550W, i don't know which type you use.
OCZ Fatal1ty 550W is 2 rail, max 25 A per rail which clearly will overload

OCZ ZS 550W is single rail, max 38 A & OCZ ZT 550W is single rail, max 45 A should do the job

Gator-hex

hero member

Activity: 490

Merit: 500

Quote from: marto74 on March 08, 2014, 09:14:02 AM

actualy already made this but with some other changes in components

Is there anywhere else on the board we can solder these legs to Marto? When they come off they take the circuit board contract with them so they cannot be soldered back to their original place. Zich's solution of soldering to the nearest good leg wont work for someone with Eestimee's problem where all the poly-fuses have a bad left leg. Maybe if you fix Eestimee's board you can take a photo to show us what you did to it? Thanks.

Gator-hex

hero member

Activity: 490

Merit: 500

Quote from: askhimthatsoon on March 08, 2014, 07:09:40 PM

I got my HEX8A1 to operate this morning, but it was an adventure:

* Tried OZC 550w PSU yesterday, default settings: 260 clock,1000mV => Miner started hashing but as soon as I checked hashrate in terminal (next room) I saw it already disabled itself. Went back to the PSU, HEX8A1 is off. PSU is dead.
* Next try: El cheapo CP 750 Plus PSU. The label says 2*12V rails with 30A each = 720W. I used only the 2 PCI-e power cords, no other load. I tried default settings again. Miner hashes, with very high hashrate (way over 260GHs) but after 20 minutes, PSU switched off. PSU in failsafe mode.
* Couple of additional tries ending with PSU switching off.
* Here is what finally worked (stable for a few hours now): 255 clock, 980mV. Results in fairly stable 260.5GHs. I didn't measure the actual power draw at the wall yet, but I am scared already.

I had a similar issue, 1 Hex8A1 was ok, but 2 would put PSU into shutdown, even though it was well within power limits of the PSU. All it needed was something on the 5V line of the power supply to fix it. I connected a 12V fan the the red/black wire of a molex connector. But some people use a hard drive/floppy drive/CD or DVD drive. But I find another fan more useful. Tongue

askhimthatsoon

newbie

Activity: 15

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I got my HEX8A1 to operate this morning, but it was an adventure:

* Tried OZC 550w PSU yesterday, default settings: 260 clock,1000mV => Miner started hashing but as soon as I checked hashrate in terminal (next room) I saw it already disabled itself. Went back to the PSU, HEX8A1 is off. PSU is dead.
* Next try: El cheapo CP 750 Plus PSU. The label says 2*12V rails with 30A each = 720W. I used only the 2 PCI-e power cords, no other load. I tried default settings again. Miner hashes, with very high hashrate (way over 260GHs) but after 20 minutes, PSU switched off. PSU in failsafe mode.
* Couple of additional tries ending with PSU switching off.
* Here is what finally worked (stable for a few hours now): 255 clock, 980mV. Results in fairly stable 260.5GHs. I didn't measure the actual power draw at the wall yet, but I am scared already.

http://thatapp.de/hex8a1.png

marto74

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Are you powering the hub(if any ) and TP-link from the board it self?
Just power the tp-link with 5 V separately.
It think this is your issue with router and dd-wrt/cgminer setup

Topic: [ANN] Technobit HEX8A1 -240 GHs Coincraft A1 board- Finished production - page 20. (Read 72425 times)