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Showing 13 of 13 results by seanverlast
Post
Topic
Board Mining (Altcoins)
Re: Using a Grow Tent for a mining rig cooling case?
by
seanverlast
on 26/04/2018, 19:45:39 UTC

Are you venting your hot air outside from the output of exhaust fan(s)?  Also, are you bringing in air from outside on the intake side?  That is what made a big difference for me.

I am jealous of your temps.  I live in Austin, TX and in the summertime it gets brutally hot here.

Yes, exhaust goes outside and intake from the outside as well, ducts are some 8 feet away from each other. I know TX is hot, we get some 115F here during the summer as well... but we get very cold winters, we had like 5F for some weeks last winter with snow and everything. I was running all my GPUs with just a few fans and a 2 feet window open, thats how cold it was.
Post
Topic
Board Mining (Altcoins)
Re: Using a Grow Tent for a mining rig cooling case?
by
seanverlast
on 26/04/2018, 19:19:15 UTC
I had better success with setting my tent up with metal shelving that went from floor to ceiling and using a "hot/cold aisle" approach.  The intake is in front of the shelves and all the fans blowing towards the back of the tent.  The exhaust fans suck from the top of the tent directly outside.  I also used styrofoam insulation boards on the front of the shelves to block off unused space so it forces the airflow directly through the rigs.

4,500CFM is solid, are you bringing air from outside in and pushing it back out without restriction?  If you don't have airflow to/from outside then you will restrict air movement.  Bringing in air from outside and pushing hot air out made a significant difference.

Before the tent I had metal lockers working the way you describe, which is similar to how rackable servers work - intake at front, exhaust to the back. This did the job over the winter but temperatures were different. On each of these I had 2 compartments of 13 GPUs each with 8x50cfm 120mm PC fans at 12V for intake at the front and 2x 200mc/h duct fans for exhaust at the back of the locker. It worked nice (all GPUs under 50C) until spring when temps started spiking over 70C in the locker contraptions so now I am playing with tents.

The tent I am trying now has the intake fans at the bottom and the exhaust at the top, I figure hot air should rise anyway because physics and I also have 6 duct fans inside blowing from bottom to top. I've tried every possible combination of all these fans on/off, switched positions and so on... I figure I'll just have to try some AC because right now the GPUs mine at some 65C during the day and 55-60C at night...I am not comfortable perma running them at ~60C, I'd rather have 50 or 55 max.
Post
Topic
Board Mining (Altcoins)
Re: Using a Grow Tent for a mining rig cooling case?
by
seanverlast
on 26/04/2018, 15:12:21 UTC
I'll leave the maths to the clever people, but having done several similar tests, I can tell you that 6in ducting is not wide enough. 8in can be but it's a struggle - you'll need an epic inline fan that'll eat serious wattage (and cost hundreds for a specialised industrial fan unit).

You basically want the biggest extractor fan diameter you can fit - bigger fan, lower RPM = quieter, cheaper to run.

How does ducting diameter matter? I thought only fan capacity matters, cfm. You can have a fan pull, say, 1000 cfm through a 8" duct and you can have another more powerful fan pull 1000 cfm through a 6" duct.

On a side note, I see nobody mentions which area of the box or tent get ventilated more and which less based on fan placement... in my case I measured temperature in various corners of the tent to find differences of up to 8C even, so some spots in the tent did not get ventilated enough despite having 2 x 500 cfm fans on the exhaust.
Post
Topic
Board Mining (Altcoins)
Re: Using a Grow Tent for a mining rig cooling case?
by
seanverlast
on 26/04/2018, 12:35:05 UTC
Either I'm not doing it right or this tent thing kind of sucks...I have 20 1070's in a 70 f^3 / 2 m^3 tent I am sucking air out of with 2 fans rated at 450 cfm (700m^c / h), and 2 more fans at 150 cfm each on the intake pumping in cold-ish air from my garage at about 70F/20C. Can't seem to get the GPUs under 150F/65C. Won't even try AC because the lowest temp I can get out of a portable 12K BTU is about 16C.

I think people who got this to work live in colder areas or made it during the winter, over here I will probably get 40C during the summer.

So you might want to reconsider if you are planning on spending $800 on a tent, vents, tubing and so on.
Post
Topic
Board Mining (Altcoins)
Re: Mining rig cooling solutions
by
seanverlast
on 14/03/2018, 15:03:09 UTC
If you have only single 6 GPU mining rig,just need a big fan and a window facing outside, control your rig temperature under 70 degree C,it's all

That is what I have but they're all over the place, which is why I want to merge them into bigger rigs and stack GPUs vertically.
Post
Topic
Board Mining (Altcoins)
Re: Mining rig cooling solutions
by
seanverlast
on 14/03/2018, 13:42:59 UTC
Hi guys,

Didn't want to post a new thread but here's the situation I have:

I have some open-air 6 GPU rigs scattered all over my house I'd like to move in my 4m by 6m garage at 3m height (13 by 20 ft and 10ft height). For this to work I have to find a way to have larger rigs and stack them vertically and be able to cool the space without AC (at least during the night, because during the day it can get 40C/100F around here. I use nvidia 1070s in all rigs.

So first thing I tried is this:

https://www.dropbox.com/s/man1u53mh0va9y4/Photo%2014-03-2018%2C%2015%2015%2035.jpg?dl=0

... a larger open air chassis with enough space to fit in around 40 GPUs right now with enough space for another 40 on the 2nd "floor". At the bottom I've placed 6 fans rated at about 200m^3/hour each (7000f^3). Result: some GPUs were ok at about 30-40C, others went all the way up to like 70C with outside temp at around 10C/50F, I suppose based on how them fans were blowing air from underneath. Needless to say I have to use compressed air to blow out all the dust from the cards after this little experiment.

Ditched this for the time being and now I'm trying:

https://www.dropbox.com/s/676b12qxaxcfzrp/Photo%2014-03-2018%2C%2015%2015%2045.jpg?dl=0
https://www.dropbox.com/s/0iwo6n9ng6rgpl1/Photo%2014-03-2018%2C%2015%2015%2052.jpg?dl=0
https://www.dropbox.com/s/rfq0gsbrhgvrbl7/Photo%2014-03-2018%2C%2015%2016%2004.jpg?dl=0

I've designed this to hold up to 40 GPUs in each compartment. Those are regular 12V PC fans on the locker doors, and I had the same 200m^3 fans in those holes on the sides (4 of them). If I could get this to work I would move all GPUs in a few of these lockers and spend the summer in any other way than rebooting rigs. Unfortunately the results were awful, even with only 9-10 GPUs per compartment they were getting as hot as 65C / 150F.

I have not tried yet the weed tent nor the mineral oil bath, considering to give these a try as well.

Bottom line is I am getting frustrated and afraid I'll have to either turn it all off during the day for the entire summer, or switch to AC which will set me back some $. Would very much appreciate any feedback or suggestions.

Cheerios!
Post
Topic
Board Bitcoin Discussion
Re: What if holding the bitcoin becomes illegal?
by
seanverlast
on 07/02/2018, 23:46:32 UTC
I think this question should be rephrased: what if governments declare all cryptocurrencies illegal?

Because it would make no sense to ban just one, be it btc or another, people would just switch to a different crypto and the govt would not achieve much considering their care is not for people losing their money or homes due to mindless all-in trading, but their only care being to keep collecting taxes so that our chosen few may live lives of luxury off our hard earned money, and the real leaders of this world and owners of most assets on the planet, banks, will maintain control over all money supply and currency transfers.

So...what will happen if orning or buying or selling crypto becomes illegal? Like, jail time illegal. As in, every possible buyer or seller could be an undercover agent working for whatever govt agency will enforce the ban.
Post
Topic
Board Mining (Altcoins)
Re: ASUS B250 Mining Expert MB - 19 Cards!
by
seanverlast
on 07/02/2018, 15:30:06 UTC
I have two of these boards, I run 13 GTX 1070's on one and 9 on the other. I use i3 processors and 1000W FSP Aurum PSUs, plus SATA powered risers. My findings:

- Must enable CSM in bios in order to detect the SSD/HDD and boot up.
- will not start with 2 DDR4 modules (corsair vengeance 8gb at 2400 MHz each), in fact not only it won't start it behaves as if something shorted and won't start up sooner than 30 mins after pulling out the 2nd module
- will not start with more than 13 video cards plugged in no matter what. cards and risers powered from the PCIe PSU cables ofc.
- Asus customer support is a f****ing sad joke, the most interesting "reply" I got was to RTFM along with 3 screens of canned garbage and disclaimers that took them a week to send.
- online manuals are useless, possibly compiled in india or paki or something, even a 15 year old's common sense does a better job at solving issues.
- PCIe 1x connectors are low quality and poorly soldered to the board, didn't see a manufacturer such as asus building a heavy duty niche board without paying more attention to these "details".
- board has no power button, annoying.
- couldn't get wake on LAN to work yet, possibly bios issue.
- board price should have been $160 or so but often retails at $400 or so, that's another bad joke and definitely not worth buying at $400.

The rigs are somewhat difficult to manage due to lack of space that quickly becomes a problem with so many GPUs. So you will probably want to build a custom chassis for this toy and use PCIe extenders, longer riser cables (the 60 cm version), possibly forget about plugging the PSUs in the mobo ATX connectors and do a bypass that will also allow you to use multiple 650W PSUs that are more cost efficient if you throw in some PCIe splitters, just be careful with the amps. https://howchoo.com/g/nmu4mtjjnzq/how-to-diagnose-a-psu-without-any-tools

Once these annoying gimmicks are out of the way it all runs smooth and stable at some 32-33Mh/s with ETH per card (zotac and KFA2 cards)

But I will not buy more unless they fix the 13 GPU "limit" or bug or whatever it is...because the component cost saving promise turns into wasted time managing difficult rigs and guessing fixes for various snags.

cheerios
Post
Topic
Board Mining
Re: ASIC miner for genomic sequence alignment
by
seanverlast
on 16/09/2017, 22:14:11 UTC
Hello,

I am a scientist and some of the work I do involves next-generation sequencing data.

The way this data is generated is that short pieces of sequence 'reads' of about 100 bases (letters) are generated in a massively parallel way and then aligned (matched) to a reference genome. The human genome, for example, is about 3 billion bases long. This is, of course, a computationally intensive process and is usually carried out on a cluster or in the cloud.

What I was wondering, is whether this process could be carreid out using an ASIC miner (probably a scrypt ASIC). The tools usually used for alignments include BWA (http://bio-bwa.sourceforge.net/bwa.shtml) and Stampy (http://www.well.ox.ac.uk/project-stampy) in case anyone is interested in answering this question. By way of incentive, this is a multi-billion$ industry...

*waits for sequence to align for the next few weeks*

An ASIC miner is made out of lots and lots of specialized integrated circuits that have been customized to do one thing only: hashing at very high speeds. Since this type of MCU does not waste any cycles on anything else it is very efficient compared to, say, a personal computer processor which does a lot of other things at the same time.

Unless you can break down your sequencing algorithm to solving lots of SHA256 hashes, you can't use a mining ASIC for that.

You should look into specialized ICs if already designed, if not (likely) you can try to contact an electronics engineer to help you design some FPGA-based boards for your specific algorithms. A FPGA based solution will be much faster than what your current options are (mainly the hyped and overpriced cloud) and if you get some VC you can design your own ASICs and break the world record for processing genome data.

Keep in mind that most popular VC companies will not fund you because they're likely in cahoots with certain companies and other groups of interest that would be very keen (multi-billion dollar worth of keen) to keep ripping off their pharma clients and specialized in blowing away R&D budgets through the Seychelles.

So your best bet is to hit it off with a small group of literate private investors (not some random hillbilly who just found oil in their backyard) and invest significant effort in your qualifying process.

Contact this person if you're really serious with your research: https://twitter.com/rikisabatini
Post
Topic
Board Bitcoin Wiki
Re: Request edit privileges here
by
seanverlast
on 27/01/2016, 15:56:59 UTC
Hello!

Could I get my username activated please - alex_lw

Thank you!
Post
Topic
Board Gambling
Re: New bitcoin sportsbook and casino
by
seanverlast
on 09/11/2015, 14:29:08 UTC
Hi There

Best of luck with the new sportsbook and casino.

I noticed you said that players can deposit in bitcoin and then will have the facility to withdraw in credits that are redeemable
for cash. Can you please explain this a bit more for me.


We have a prepaid credit feature - if you have $1000 in deposits or winnings or referral commissions in your wallet (on our website) you can generate codes of $200 each which you can sell to whoever for cash/paypal/skrill/bitcoin, and you get a 10% bonus as well, so after printing out $1000 credit codes you will still have $100 in your account which you can use as you wish.

Whoever buys credit from an affiliate/customer can add the credit to their account by entering the code on the website. They will still qualify for bonuses as well.

Right now we don't have any local agents yet but once we will, you will also be able to get in touch with an agent to redeem the codes for cash.

Hope this helps.
Post
Topic
Board Gambling
Re: New bitcoin sportsbook and casino
by
seanverlast
on 09/11/2015, 13:36:36 UTC
This isn't indeed the right section. This should go on Gambling Smiley
Exactly... Kindly move this thread to its appropriate section as follows:  Bitcoin Forum > Economy > Marketplace > Gambling    https://bitcointalk.org/index.php?board=56.0
How to move: The option is located on the lower left of this thread

Update:
Since this is still not a finished one, then the right place for it would be on : Bitcoin Forum > Bitcoin > Project Development    https://bitcointalk.org/index.php?board=12.0


Question:
The $100 credit for Paid Reviews, are they also non withdrawal as to the one's product testers are getting or for reviewers could be withdrawn?

Thanks for the pointer earlier. Project is finished but we don't want to link it here, at least not yet. The $100 credit for paid reviews can't be withdrawn, all reviews and links will be paid for separately.
Post
Topic
Board Gambling
Topic OP
New bitcoin sportsbook and casino
by
seanverlast
on 09/11/2015, 13:16:34 UTC
Hello and thank you in advance for giving this a read. I hope I am posting this in the right section.

My name is Sean, I work with a small group of entrepreneurs and investors to start a new bitcoin sports betting and casino website. I am trying to get some input and feedback from the community regarding some of the best practices and common expectations for and from this kind of business. We have been looking for quite some time at this forum and several others and feel that there are users who have significant experience with similar websites, so we'd like to ask for suggestions so we can improve our service.

PRODUCTS
First of all, I will explain what we plan to offer:
1) Casino games - 4 roulette tables, 2 blackjack tables, several slots, 2 poker games. For now we will only launch with about 10 or 15 casino games until we can reach an agreement with one or two of the big providers such as PT or NE or MG.
2) Multiplayer poker - we will start our network from scratch (unfortunately), our game will work in-browser without any software downloads.
3) Sportsbook - 3% to 10% odds on soccer, american football, basketball, NHL, horses. No live betting.
4) In the very close future, live casino - we are in discussions with two providers, as soon as an agreement is reached regarding revshares and integration.
5) Binary options (stocks, metals, currencies) - as soon as we finish our integration with our 3rd party product provider.

DEPOSITS/PAYOUTS

Deposits and payouts only with bitcoins. There is also a prepaid code system which allows members to deposit bitcoins, buy credit codes and sell them for cash either in-person or through the internet.
Deposits will be instant, payouts will take anywhere between 1 hour and 24 hours at first, then depending on volume we might want to automate this so that payouts also are processed instantly

ACCOUNT TYPES
All users must have an account, even if it's an "anonymous" account where they do not have to provide any personal information. An e-mail address will be sufficient. The following account types will be available:
Standard - normal users, casual gamblers/players
VIP - high volume accounts with minimum deposits of $5000 in BTC per month
Trader - for arbitrage traders who want higher odds in order to match their bets vs an exchange

What we are looking for

Mainly suggestions and constructive feedback, as follows:

1) Regarding our bonuses program.
We've noticed a lot of websites offer bonuses varying from one-time $/EUR 20 fixed amount and up to 500% every-deposit bonus. We can work with either fixed amount bonuses or percents, either one-time bonus or a bonus for each transaction. We are however concerned regarding offering high bonuses because I see how lots of websites fail because of this - they offer 100% bonuses on each deposit and later when people win and request payouts they close down shop. We do not want this to happen, so we must offer the right bonuses so that users are attracted to the service, but at the same time we want to make sure the business is sustainable.
We can offer the following types of bonuses:
- first deposit fixed amount, like for instance $25 one time with the first deposit
- every deposit, fixed amount - up to $50 on each deposit of $50 or more
- first deposit, a percentage in bonus, for instance 25% up to $50
- a percent of  each deposit, like for instance 50% on each deposit up to $500
- bonus coupons - enter a code and get a bonus based on the last deposit, each coupon will have a bonus percent and cap. Those we'll give away only to select customers and also offer for free for Christmas.
Note that we can offer different bonuses to different types of accounts, for instance traders can get an one-time $20 bonus while VIPs can get 100% on each deposit. Rollover requirements may be different, as I will further outline below.

So, question #1: what do you think we should offer in terms of bonuses?

2) Regarding rollover requirements.
As mentioned above we can offer different types of bonuses to different types of accounts.
For example, a $25 one-time bonus can come with 5x rollover requirements on sports with minimum odds of 2.5 per bet, while a 100% each deposit bonus would require a 20-30x rollover requirement with minimum odds of 4.5 per bet. This is so that people who just want to have fun can get enough bonus funds to play for a long time, while others such as traders or those guys who just want to get rich quick will have a hard time clearing the bonuses through payouts from our site.

So, question #2: what do you think the rollover requirements should be, for the bonuses you suggested previously?

3) Margins on sports events
By default all our market data will come at 2-3% margins. We will further customize these margins based on account type, sport and time of the year. For instance, we can lower default margins to a standard 10%, but drop it to 1% for Christmas. We can also customize margins based on types of accounts, for  VIPs we can offer a 1% boost on Soccer or Horses, while for traders we can offer a 0% margin on odds under 2.0 (or whatever is the minimum for wagering requirements) so they can clear the funds through an exchange and return for additional business.

So, question #3: how would you customize the margins on a sportsbook?


4) Casino games
All games are configured to pay out 90% to 95%. For now we do not plan on changing this, but please send suggestions for promos or casino-only bonuses.

We are also interested in:

Product testing

Where we will give you a $100 code and you can go ahead and play with the website as much as you want. Just so that there won't be any confusion, you will not be able to withdraw this money. You cannot withdraw any winnings either.

Affiliates
We will have a 30% affiliate program with real-time reporting and also 10% commission on all credit sales (prepaid codes), so if you feel you can bring in some customers please e-mail your name and phone number and someone from our side will give you a call.

Paid links:
We are interested to buy quality non-spammy links at a flat rate per month, we can pay in either Paypal/Skrill, Bitcoin or with credit codes (15% bonus on these) you can sell to other people for cash. If you are interested please send an e-mail with links to your sites, pages you're willing to link from, your asking price, your name and phone number and if we're interested we'll give you a call.

Paid reviews:
We will give you $100 credit to play with the site and you can write up a review, send it to us first for confirmation, and publish this on your website. You will not be able to withdraw the test credit or any winnings. You can use affiliate links and promo coupons so you get more $ from your traffic. If you are interested please send links to your site(s), sample content you've written, asking price and your name and phone number and we'll get in touch with you.

We are also interested in any constructive feedback that can help us improve the product, eg feature suggestions, do's and don'ts, links to other sites or games that you like.

To get in touch please send e-mail to sean.everlast@gmail.com. Note that if you post replies/questions here we may not be aware for several days, so it's best to get in touch over e-mail.

I will be looking at this forum but will not participate in discussions, so any questions you expect answers to should be forwarded by e-mail at first, then discussions can take place over the phone.

Later edit:
We are OK to use escrow if required, or we can pay in advance via Paypal/Skrill only to verified business accounts.