It make sense. Outtacke fans should automatically create an ariflow. Until now I tried adding intake fans in 2 and 3 positions and instead of lowering temperatures I got an awesome +10°C in the room What do you suggest for the 12x24cm hole I have on the side of the wall (4) considering that there's fresh air in the other room?

I have a severe issue with my cooling system.

I have 50+ GPU in a room mining 24/7. They're all GTX 1070/1070ti and right now their average temperature is 84°C and their fans are spinning between 50 and 80%. In front of evey GPU I placed a 12cm fan but it's so damn clear that the real problem is that I am unable to dissipate heat. The room is hot as hell and the passive ventilation is not enough to cool the room. I prepared an awesome image with my paint skills that says everything

http://dev.revhosting.org/bit/airflow.png

Here is my question. I don't fu**ing know how to configure the holes/windows I have. I tried with few setups and I got even hotter temperatures. Keep in mind that I have enough fans for all holes in questions. I'd like to avoid conditioned air solutions. What do you suggest?

Thank you

Yes, I am already able to pull data live from explorers of all altcoins and store them for later use. I'm interested in altcoins that support masternodes and for all of them I already have difficulty, network hash, ttf / block time, block reward, last block (I don't think that it's necessary in the formula). I'll take as example still RAP.

At the time of writing this I know for sure that during the last 10 days I mined between 130 and 180 RAP per day. Min and max values are so different because the coin is small and hashrate fluctuates a lot. Anyway it shouldn't be a problem for now. Let me add all variables.

My hashrate = 22000000 (hash/s)
Network hashrate = 175377838 (hash/s)
My share = 22000000 / 175377838 = 0.1254434 (1.25%)

TTF/s = 128 (seconds)
Emissions = 86400 / 128 = 675

Block Reward: 2.976 RAP
Difficulty = 5.660038

The amount of RAP mined per day at 22000000 hash/s should be equal to ((My share * Emissions) * Block Reward) therefore ((0.1254434 * 675) * 2.976) = 251.99 RAP.
The result is 71% greater than reality For sure I should add the difficulty in the formula but I don't know how.

I correct myself. I don't need to use it on Excel in a strict sense. I'm using Excel just to make calculations on the fly. In the end I'll need to add the formula in a software I developed to manage and monitor all my rigs remotely and automatically.

Right now I am already "pinging" services like Whattomine, Mastenodes.online etc. to perform automatic actions but Whattomine gives values for a very small amount of altcoins. I need to apply the same formula to all other coins so that I can use the auto-switch to mine masternodes depending on my priority list, the amount of nodes I want and of course the days needed.

Hi,

I'm trying to find a formula to calculate expected earnings when mining depending on my hashrate. I know the formula that is used for BTC but I'm mining altcoins (prevalently neoscrypt). Before you ask I don't want to use websites like Whattomine since I need to play with results on Excel. It shouldn't be so hard but I am having problems. I am playing with this formula I found on StackExchange:


The problem is that the result of the formula is hugely different from reality. In this precise moment I am mining for testing purposes RAP with 2 of my rigs and I have the following values:

• My Hashrate is 22 Mh/s
• Network Hashrate is 264 Mh/s
• 24 Hour Avg Block Time is 127 seconds
  

---

Let's insert my data in the formula:

HR = 22 MHs / 264 MHs = 0.08333
E = 86400 (1 day) / 127 TTF = 680.3149
C = 0.08333 * 680.3149 = 56.69

The formula says that I should gain 56.69 RAP per day but in reality I am getting between 120 and 150 RAP per day! What is wrong in my calculations?

Solved! The wallet was opening for real out of screen. Last time I opened it from my office PC (34 inch display 21:9 widescreen) via Remote Desktop. My home PC is 22" and Windows for unknown reasons keeps opening the wallet it in the non-existent part of the screen In any case thank you for reply.

I don't know where I should ask this question. I hope it can help.

I've a considerable amount of RAP (even though I don't know their value ) and the wallet no longer works. I'm on Windows and I have several wallets on my PC that uses the same software (GBX, INN etc.). They only wallet that doesn't work is RAP. When I start it I see the splashscreen then the window goes out of screen on the right. I can't access it. I can only see hover preview on my taskbar with application title "Rapture Core - Wallet" and a big white screen below. I tried to install multiple times but it still doesn't work

I own 3 masternodes but I still don't understand why I cannot retreive informations about my balance using explorers. I can normally see it via SSH with the proper command but according to explorers "Address not found" is the only possible response. I can successfully inspect all my wallets but not my masternodes.

Before you ask yes, all my masternodes are active, functional and receive rewards. Am I missing something important?

Edit: I got it! Our sysadmin blocked all ports

** You can skip this part **

I would like to start this thread offending MSI but let's move on. I'll just say that I hate they way the use their damned asterisks! I purchased a Z270 M3 board and I realized that it doesn't support 6 GPUs. I am not a total noob therefore before purchasing it I read all specifications and the manual and they only talk about M2 slots that disable specific PCI ports when in use but in reality there was something more! After spending more than 5 hours in their forum I started to see a lot of quotes by MSI staff to people having my same problem:

All these mysterious asterisks that they keep quoting from Z270 M3 specification page, ARE MISSING! I don't really know where the hell this information was written! There's NOTHING in the manuial and NOTHING on their website but they keep quoting this important information without any source I'm gonna send back this damned board asap.

** Start here **

Now that I am calm, could you please recommend me motherboards that supports 6 and 12 (or 13) GPUs? I already know the following models:

6 GPU:
- ASRock H81 Pro BTC+ (6 GPU)
- Gigabyte GA-Z170X-GAMING 6 (7 GPU)
- BIOSTAR TB250-BTC (6 GPU)

12/13 GPU:
- ASRock H110 Pro BTC+ (13 GPU)
- BIOSTAR TB250-BTC PRO (12 GPU)

But since I no longer trust myself and I am starting to hate the stupid use of asterisks, could you please give me confirmations and recommendations?

Thank you a lot!

Thank you for reply.

Well, I do understand perfectly but let's suppose that I have an huge amount of coins of a specific currency due to mining or due to the fact that we're crazy (we are! ).
How can I can the best profit from it? More masternodes or a single one with tons of coins? I would say that it should be the same if we don't consider the costs of having multiple VPS and IP addresses but I am not sure about it.

Hi,

In this precise moment we have an Arctic Coin masternode that costed us about 200 €. We used it as a test before taking more expensive masternodes like Innova or bigger ones. The question is that I don't understand one particular thing...

More coins or more masternodes?
Let's say that a masternode of a particular cryptocurrency requires 1000 coins. Now let's suppose that I already own 5000 coins. Should I run 5 masternodes each one with 1000 coins or a single masternode with 5000 coins? Which of the two gives more profit? Is it the same?

Thank you!

Why? What's your opinion? Don't forget that I am paranoid so I must know it!

Personally I'm thinking to store all my wallets on a metallic plate (QR code) and copies on plastified paper. I want to store the first in a safe-deposit box in my bank insured for 30.000 € - even if the value of my wallets in theory could be greater - and the latter in a secret and inaccessible place that even CIA can't find As if it isn't enough I'm going to use my personal "system" for the letters and numbers wrote on the paper.

Frankly I don't understand why people don't use safe-deposit box. For less than 30/50€ per year you can keep your box in the vault of a bank. 1 key is for you 1 key is for the guy with a gun that lives in the vault. Evey time you enter you have to sign the attendance register. If your box is stolen or if the bank cannot find it (e.g. earthquake, meteors etc.) the insurance company have to pay out 10-30k (or even more) immediately with real money even if your box was empty. Way better than an USB device in my opinion.

p.s. Yes, I am a bit paranoid

I'm gonna bump my owm post with new details.

For now we decided go with an "asap" configuration starting with 10 kwh solar panels and 2x UPS (can't remember their wattage) with cheap energy from power gird. The building is situated in Italy (Sicily) therefore we can enjoy almost 365 days of sun We decided to install all our rigs inside electric containers like this one...

http://www.eleco.mo.it/wp-content/uploads/2014/01/Container-Cabine-Elettriche-9.jpg

Each container has conditioned air from one side and heat extractor on the opposite side. We put all containers inside the building for extra safety. I still have to figure out if in this specific scenario fans installed in front of GPUs are necessary. I don't want to waste power and money fans that are probably useless. To host masternodes we are going to use a standard datacenter therefore there's nothing special to say.

I am open to suggestions!

I want to buy this card but franky the story behind this board is fuzzy. I mean their claim is loud and clear «19 GPU» but in reality you can have 13 conventional GPU and 6 mining ones. Could you please give me clear answers to the following questions that everyone needs to hear?

• I still don't understand if I can mix AMD and Nvidia cards respectively on Windows / Linux. I want my GPU to be 100% GTX 1070 but this question could become crucial later on
• We all know that the issue is caused by Asus itself but I don't get if this is a clear bug or a wanted "feature"
• Asus promised a BIOS update (maybe) aimed to solve this bug (or feature?). What's the hell is going on? Their latest update doesn't change anything
• Final question: buy or pass? If we pass what is its closest alternative?

Hi,

During the last few months I've started to invest in this market of cryptocurrencies and now I'm starting to build my first GPU-based mining rig. I shared my experience with a few friends of mine and quite soon we realized that we all want to create a large-scale infrastructure. Basically I am talking about creating a datacenter for mining.

We have lot free space, terrains, solar panels and most important one of us has factory that is already consuming megawatts of energy. We can also manufacture custom stuff of any material directly on site (e.g. racks to contain most of the components). The idea was to start next month with something like 50 GPU and few Antminers just for fun and eventually go for a large-scale infrastructure if it's worth with hundreds of ASIC and GPU. Obviously we have money to support this project and we won't cry if it's a total failure. We can stand that.

This may seem like an odd question but what are the best practice to create a mining datacenter? Keep in mind that more or less I know how to "play" with a conventional datacenter for hosting providers (it was my old job). I suppose that ASIC/GPU miners and servers share many aspects, requirements, dos and don'ts. No dust, low temperatures, ventilation and stuff like that but is there something peculiar or relevant on which I should focus for an ecosystem made of miners?

Thank you for your time

Thank you.

D'oh! Few hours ago I bought all parts except the motherboard so maybe I can still change my mind about this Asus board.

What's the story behind this 19 GPU motherboard that can only run 13 general-purpose GPUs? I finished to read many articles and posts about this issue and I am very confused. What's the point of supporting 19 GPU when 6 of them must be Nvidia P106 with no output ports that use the same power of their counterparts (the GTX 1060 that I don't want to run)? Please tell me if there's a workaround like using Linux and/or a mix of AMD and Nvidia cards. Is it possible that there are still no BIOS updates by Asus to fix this problem?

I did some calculations and probably you're right. Let me explain.

I'll start with 6x GTX 1070. Each of them uses between 150 watt @ 30 Mh/s out of the box. I've seen people getting 30 Mh/s using just 105 watt with a bit of tuning. Long story short the power consumption should vary between 900 watt (worst-case scenario) and 630 watt (best-case scenario). I also need to consider the consumption of other parts (CPU G3900, ASUS B250 Mining Expert, RAM 1x4GB, 1xSSD, 6x 12cm fans). Probably we're around 1000 watt therefore we have...

1st PSU to power 6x GPU and the entire system: 1000 watt (max) / 730 watt (min). If everything I said is correct, yeah, I should take max 1200 watt.

Now let's suppose that I one day want to add 6x additional GTX 1070. I'll need to attach another PSU to the ASUS B250 to provide energy just for the GPUs therefore...

2nd PSU to power 6x GPU: 900 watt (max) / 730 watt (min). A PSU with 1000 watt should be enough.

3rd PSU to power 6x GPU: same exact story.

If everything is correct I saved a decent amount of money so thank you

I understand but I am not that good to "play" with PSU. I prefer to go for a plug and play solution even if I'm going to pay more.

Good point but I prefer to avoid server-grade PSU. They're cheap but also noisiest compared to desktop-oriented ones. Moreover I'll need additional cables and usually they're less efficient. The DPS-2000BB for example is 80 Plus Silver (85%) against 80 Plus Titanium (90%+). I know that it costs 4 times more but money is not a problem.



I admit that I decided to go for gtx 1070 just because AMD scares me a bit. Usually AMD cards are cheaper which is a plus but they use more power, have slower support for drivers (DAG issue has been fixed in... months? can't remember) and need more tuning. On the other hand I see people getting 30+Mh/s on the gtx 1070 farming ETH and consuming 105 watt with just few restarts. Isn't it impressive?

Let me make it clear. Money is not a problem. I'm not trying to save a few bucks. All I want is a mining rig with the best possible hasrate / power consumption ratio. As far as I know an RX 580 can't give me 30 Mhs @ 105 watt mining ETH. That said, if we don't consider the price of these cards, can we say that the gtx 1070 has a better watt-per-hash ratio than the RX 580?

Thank you for reply.

WTF!!! You gave me a super-awesome info! I wanna kiss you lol A consumer-grade motherboard with 19 GPU slots by Asus! I immediately changed my mind. I'll go for it. Does it run smoothly? I mean is it plug and play or do you do need to play with settings in order to make it work with an high numer of GPUs?

Now I'm gonna recalculate all things since I want to make a system that allows me to add 1 PSU (same brand, same wattage) every 6 GPUs (same model). Probably the AX1500i (1500 Watts) is too much but its smaller brother the AX1200i (1200 Watts) is probably too close to the limit... I mean...

1st array of 6 GPU (max 150 watt each) --> 900 watt
2nd array of 6 GPU (max 150 watt each) --> 900 watt
3th array of 6 GPU (max 150 watt each) --> 900 watt

But one of the PSU should also power the motherboard, CPU, RAM, SSD etc. so probably the best option is...

1st array of 6 GPU + System --> ≃1200 watt powered by AX1500i
2nd array of 6 GPU (max 150 watt each) --> 900 watt powered by AX1200i
3th array of 6 GPU (max 150 watt each) --> 900 watt powered by AX1200i

Is this a good idea?

Nice