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1  Alternate cryptocurrencies / Mining (Altcoins) / Re: Gigabyte GTX 1080 TI - Source For New Fans on: December 11, 2017, 08:45:49 PM
Cool, I finish for Christmas in 2 weeks so this could keep me busy for a while.
Im not worried about the noise, its surrounded by S9's anyway.
Its kind of my daughters rig, she finds it really interesting mining.

Just a thought, did you space the fans above the heat sink surface so the back pressure does not over current the new fans?
That could be easy with trial and error to work out.

Right, Im gonna order some fans tonight this could be fun!

I didn't space the fans above the heatsink as I haven't spend much time at all with them.

If you're going with Noctua or any other custom (non-gpu) fans, make sure to check out their airflow (CFM). One smaller and one bigger set of fans performed terribly as they weren't pushing enough air (low CFM).

I'll be playing more and replacing fans on ~10 x 1070s with Noctuas sometime the next week or so, so I'm curious what you'll go with.

Hi.

Specifically looking for a UK source for a replacement fan for a Gigabyte Nvidia GTX 1080 Ti 11GB GAMING OC Graphics Card.
There are a couple that look ok on eBay (China / Hong Kong).

Ideally after a UK seller.

Anyone know what model the fan is or point me in the right direction please?

have you tried to contact gigabyte, most of the larger gpu makers have divisions in other countries. most cases they might provide a couple for free or very low cost


I did and they told me they do not sell replacements of any kind. YMMV though but I find it unlikely.

Ok I got the anemometer from work, am planning on putting a tube over each fan and measuring the airflow.
Im a HVAC engineer by day so the volume and velocity calcs wont be to hard to calculate.
Ill match something with a 30% / 40% overhead see how it goes.
2  Alternate cryptocurrencies / Mining (Altcoins) / Re: Gigabyte GTX 1080 TI - Source For New Fans on: December 11, 2017, 08:43:42 PM
Hi.

Specifically looking for a UK source for a replacement fan for a Gigabyte Nvidia GTX 1080 Ti 11GB GAMING OC Graphics Card.
There are a couple that look ok on eBay (China / Hong Kong).

Ideally after a UK seller.

Anyone know what model the fan is or point me in the right direction please?

have you tried to contact gigabyte, most of the larger gpu makers have divisions in other countries. most cases they might provide a couple for free or very low cost

Does not appear they sell as spares.
Seems an after market product from China / HK but as said above, just the same crappy fans to put back on.
Think its just time for a mod.
If the cards any good and it stays very cool, it should cause it less stress than having heat spikes from bad fans.
3  Alternate cryptocurrencies / Mining (Altcoins) / Re: Gigabyte GTX 1080 TI - Source For New Fans on: December 11, 2017, 08:28:26 PM
Why bother for warranty ? it could take weeks at best. i'd be bothered ship my card just for replacement fan, in mining time is $$. Just take a look at this https://www.youtube.com/watch?v=-yQHAMz1v5g

Its had a hard time, it comes apart to be cleaned often and I couldn't be bothered to put all the screws back in it.
It runs fine except the failing fan  Grin
4  Alternate cryptocurrencies / Mining (Altcoins) / Re: Gigabyte GTX 1080 TI - Source For New Fans on: December 11, 2017, 08:20:34 PM
I have/had a bunch of Gigabyte 750Ti/970/1070/1080Ti cards. The fans on the 970s died within a year and the fans on the 1070s died within 6 months. Meanwhile, I have 750 Ti's with mostly working fans.

All these cards have crappy sleeve bearing fans. Except for the AORUS series, which is the flavor I have my 1080 Ti's in. The AORUS series have double ball bearing fans which are basically what every card should have; they're superior.

I have also contacted Gigabyte, trying to buy replacement stock fans but they do not sell any parts. But they replace it under warranty, but that might take weeks/months depending on your location.
So you can really only get replacement fans on ebay but they will die just as soon as your stock fans did. But if you send the card back for a warranty process and if they notice that you have replaced the fans, your wannanty will be void so in case the card dies, you have to put the original fans back.

In case you're going with ebay fans, you really only should look at how much amps the stock fans pull after checking yourself (for example 970 G1 - 0.20 amps, 1070 G1: 0.35 amps) and use fans that's equal or lower than that value (unless you want to power the fans straight from your PSU or a fan header). Some cards Gigabyte cards have different fans with different amps so better to check all three and most importantly, check the headers and only order what you can plug in without having to cut cables and replace headers.

TL;DR: only buy cards with double ball bearing fans or you're going to have a bad time.

Thanks for the info bathrobehero.
Point taken about the low quality fans.

I stripped the GPU last week for a 2 monthly service and that's when the problem started.
Ill bring an anemometer home from work tomorrow and work out the air flow on 100% fan speed per fan.
Probably 3D print a new cover and slap some decent fans onto the new GPU case and run them direct from the PSU on 100%.

If I have any issues with the GPU not having a feedback tacho pulse, Ill have to throw an Arduino together to send a false PWM signal back at it.
I had to do this with an S7 last year, as I didnt have the right fan and the IO card wouldnt run the miner up without a feedback.
Shouldn't take more than a few hours to do with an oscilloscope.

Im thinking the GPU will probably be a little more lenient as people do water cool these and throw the fans away anyway.

Probably the most important thing on a GPU is the cooling fans, its stupid skimping on the fan quality.

Happy days.

Well, watercooling is very expensive so it's mainly for gamers.

I would have just ignore the lack of tacho, you don't really need a PWM signal, %-based fan speed is based on voltage anyway, feedback is not critical.

I briefly experimented with putting high CFM Noctua fans on the heatsink (proof of concept on an 1080 G1 with 2 bigger fans instead of 3 smaller: https://i.imgur.com/1pESalU.png). With only a hackjob and hasted quick test the consensus is that it's significantly better at cooling than the default 3 small fans but with significantly more noise even at the same temps. It could be optimized, I'm sure but I haven't had the time to pursue that (to revive a couple of 1070s) and the AORUS cards are working perfectly fine.

Cool, I finish for Christmas in 2 weeks so this could keep me busy for a while.
Im not worried about the noise, its surrounded by S9's anyway.
Its kind of my daughters rig, she finds it really interesting mining.

Just a thought, did you space the fans above the heat sink surface so the back pressure does not over current the new fans?
That could be easy with trial and error to work out.

Right, Im gonna order some fans tonight this could be fun!
5  Alternate cryptocurrencies / Mining (Altcoins) / Re: Gigabyte GTX 1080 TI - Source For New Fans on: December 10, 2017, 08:49:04 PM
I have/had a bunch of Gigabyte 750Ti/970/1070/1080Ti cards. The fans on the 970s died within a year and the fans on the 1070s died within 6 months. Meanwhile, I have 750 Ti's with mostly working fans.

All these cards have crappy sleeve bearing fans. Except for the AORUS series, which is the flavor I have my 1080 Ti's in. The AORUS series have double ball bearing fans which are basically what every card should have; they're superior.

I have also contacted Gigabyte, trying to buy replacement stock fans but they do not sell any parts. But they replace it under warranty, but that might take weeks/months depending on your location.
So you can really only get replacement fans on ebay but they will die just as soon as your stock fans did. But if you send the card back for a warranty process and if they notice that you have replaced the fans, your wannanty will be void so in case the card dies, you have to put the original fans back.

In case you're going with ebay fans, you really only should look at how much amps the stock fans pull after checking yourself (for example 970 G1 - 0.20 amps, 1070 G1: 0.35 amps) and use fans that's equal or lower than that value (unless you want to power the fans straight from your PSU or a fan header). Some cards Gigabyte cards have different fans with different amps so better to check all three and most importantly, check the headers and only order what you can plug in without having to cut cables and replace headers.

TL;DR: only buy cards with double ball bearing fans or you're going to have a bad time.

Thanks for the info bathrobehero.
Point taken about the low quality fans.

I stripped the GPU last week for a 2 monthly service and that's when the problem started.
Ill bring an anemometer home from work tomorrow and work out the air flow on 100% fan speed per fan.
Probably 3D print a new cover and slap some decent fans onto the new GPU case and run them direct from the PSU on 100%.

If I have any issues with the GPU not having a feedback tacho pulse, Ill have to throw an Arduino together to send a false PWM signal back at it.
I had to do this with an S7 last year, as I didnt have the right fan and the IO card wouldnt run the miner up without a feedback.
Shouldn't take more than a few hours to do with an oscilloscope.

Im thinking the GPU will probably be a little more lenient as people do water cool these and throw the fans away anyway.

Probably the most important thing on a GPU is the cooling fans, its stupid skimping on the fan quality.

Happy days.
6  Alternate cryptocurrencies / Mining (Altcoins) / Gigabyte GTX 1080 TI - Source For New Fans on: December 10, 2017, 07:01:36 PM
Hi.

Specifically looking for a UK source for a replacement fan for a Gigabyte Nvidia GTX 1080 Ti 11GB GAMING OC Graphics Card.
There are a couple that look ok on eBay (China / Hong Kong).

Ideally after a UK seller.

Anyone know what model the fan is or point me in the right direction please?
7  Bitcoin / Mining support / Re: Antminer S7-LN Troubleshooting/Repair/Parts Help on: September 30, 2017, 10:36:32 AM
Try swapping io card between miners first, to determine if hash cards at fault or controller.
I’ve replied to you on Reddit.
8  Bitcoin / Mining support / Re: Antminer S7 not hashing on: September 30, 2017, 10:32:32 AM
Try turning on leave for five minutes then hold down reset button for ten seconds with paper clip.
Failing that either faulty controller board or all the hash cards probably broken.

Was the fan damaged when you received unit? On boot only discharge fan will operate air inlet fan won’t spin up until it mines.
9  Bitcoin / Mining support / Re: Cleaning Mining Equipment on: September 26, 2017, 08:02:41 PM
I clean my S9 miners every 8 weeks.

Turn off and unplug, allow to cool.
Remove fan near power supply connectors, take the adapter plate off the miner body X 4 screws.
Remove cables connecting hash cards to control card X 3.
Slide out hash cards.

Carefully brush hash cards using anti static brush, remove all dust and debris.
Blow with canned air.

Remove other fan and clean with brush, wipe blades with suitable cleaner.
Clean inside of case if necessary.

Put back together in reverse order, cross fingers and run up.

Pretty easy to do after a couple of tries.

10  Bitcoin / Hardware / Re: Bitmain's Released Antminer S9, World's First 16nm Miner Ready to Order on: September 24, 2017, 04:03:05 PM
Well, lost X3 hash cards this weekend over various miners.
Since buying batch 2, Ive had one hash card fail since all 10 miners arrived.

Temps are dropping in the UK, day and night temps are making the mine much cooler.

Im guessing some joints have broken down on the hash cards as they are now running way cooler.
All three cards have broken chains. No burning, no missing heat sink so should be good to repair.

Oh well, all packed up for a trip over to Denver.
Suppose given some of the horror stories on here Ive done well hash card wise since they arrived.
11  Bitcoin / Hardware / Re: Avalon A7 announced on: September 22, 2017, 04:01:05 PM
I suppose that one good thing coming out of this is that the Distributor is now a USA based company.

This should make warranty claims much easier with the point of sale not being in China.
At least western rules will apply now and there will be someone who will have to take responsibility for equipment should it prove "not for purpose".

I know that the gear is sold with 3 months warranty, in the UK no one would get away with this, goods should be fit for purpose for at least 12 months.

Just hope minerwarez have thought this through.
12  Bitcoin / Hardware / Re: S7 (or S9?) - Higher Hashing when Hot? on: September 21, 2017, 04:53:31 PM
I know it seems odd, but these mining chips do like to run a little warm. I ahve found that if I let the board temps get under 60c on the S7s they actually start to become unstable and crash a lot more than expected. Avalon 6 miners are the same way, under 60c and they see a noticable hash rate drop. I have personally found with the s7 that the sweet spot is 65-70c.

The S7's like being hot boxes.
As UK temps are falling I'm lowering fan speeds in my mine = warmer miners = more stable hash rate.
13  Bitcoin / Hardware / Re: Avalon A7 announced on: September 01, 2017, 09:07:12 PM
Somebody who placed order on 31th August also paid for the order? Mine are #90193 and #90832.


No, and I'm #89374.

I'm 89356 and i have not received a payment addy yet, but thats ok. As long as they get one to me within a week i'll be alright. Their products are so much higher quality than BITMAIN... i'll wait patiently.

It's the quality I'm looking for. The hash power of the S9 is nice, but problems are not so good.
I'm replacing my last 2 S7's and where I would normally have had S9's, I'm going for Avalons.
I only read good things about them so I'm sure the wait will be worth it.
14  Bitcoin / Hardware / Re: Avalon A7 announced on: September 01, 2017, 07:12:50 PM
Somebody who placed order on 31th August also paid for the order? Mine are #90193 and #90832.


No, and I'm #89374.

Well I'm at least 500 after you so I'm gonna have to wait a while if you haven't managed to pay yet.
With today's technology still find this strange regarding payment with eCommerce and all.
My first order with Canaan so a long wait it is.
15  Bitcoin / Hardware / Re: Avalon A7 announced on: September 01, 2017, 03:09:05 PM
I got an order in early as the sales started again without problems.

I am order number #89842 and replied with a ticket to pay in btc.

Anyone around 89842 got wallet address to pay to yet?

I guess this is going to take them some time, must be rushed off of their feet with orders!
16  Other / Archival / Re: Pictures of your mining rigs! on: July 30, 2017, 09:04:20 PM
Here's a couple of photos showing how I re arranged my miners. Four miners per rack. Each shelf has 2 X 1300W IBM server power supplies, both wired to a single switch fused spur. All four spurs (one from each shelf) wire back to a consumer unit with a 10A circuit breaker for each spur. Also a fifth breaker for a utility socket for each rack. Fed with a 3-Phase 400v circuit and a neutral to give me 230v.

It's 3-Phases with four outlets so each rack alternates the phase the 4 th outlet is on to maintain a balance.




17  Bitcoin / Hardware / Re: High Volume Water Cooling, is it an option? on: July 20, 2017, 07:40:52 PM
To give you an idea of how big a unit you would need for heat disipitation.

See the pictures here :-

http://www.pwmaintenance.co.uk/air-blast-cooler-service/


Scroll down the page and take a look at the photos.
This is a pair of 400kw air blast coolers we installed a while back.
Each one will dump 400kw of heat from a water cooler compressor.
They are sized to give a 15 Deg temp differential.

Big cooling needs big coolers.
18  Bitcoin / Hardware / Re: Bitmain's Released Antminer S9, World's First 16nm Miner Ready to Order on: July 13, 2017, 11:42:04 AM
Hi.

Logged into the mine today to check over everything as you do, one of my S9's is reporting a crazy hash rate on HB2.
Ive been over and done a hard reset and its still reporting the same after a hard reset.

...

Any ideas folks?

Its certainly not hashing at that rate although I wish it was!
You have at least 1 bad chip.
Look in the "Kernel Log" (under the "System" tab) for the words "get RT hashrate" and you should be able to see if it's just 1 bad chip or more than one (the "Asic[xx]=" part will read way higher than the rest). Sadly, there's nothing you can do to fix it on your own.

Fantastic, and here it is :-

Asic[33]=19016.2

OK, off to my friend Ashli over at Denver.

Thanks ComputerGenie!
19  Bitcoin / Hardware / Re: Bitmain's Released Antminer S9, World's First 16nm Miner Ready to Order on: July 13, 2017, 11:01:42 AM
Hi.

Logged into the mine today to check over everything as you do, one of my S9's is reporting a crazy hash rate on HB2.
Ive been over and done a hard reset and its still reporting the same after a hard reset.



Any ideas folks?

Its certainly not hashing at that rate although I wish it was!
20  Economy / Computer hardware / Re: Bitmain Antminer S9 on: July 12, 2017, 06:54:00 AM
Hi.

I'll take the S9, I'm in the UK.
Must use escrow, I'll pay the fees.
Let me know.
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