Bitcoin Forum
May 29, 2017, 05:55:53 AM *
News: Latest stable version of Bitcoin Core: 0.14.1  [Torrent]. (New!)
 
  Home Help Search Donate Login Register  
  Show Posts
Pages: « 1 2 [3] 4 5 »
41  Economy / Computer hardware / Re: [WTS] Antminer L3 250 MH Scrypt miners hosted included on: February 24, 2017, 05:33:11 PM
Hey guys who is to say what a fair markup, or a massive markup. I had to buy from a re-seller who already had them marked up and I got no bargain basement deal.

If you want to order them from Ali-express for $200-300 less and get them in 3 weeks go ahead. 

What I am actually trying to do is eliminate risk of a foreign order, and wait time for foreign shipping, and include pre-paid power and hosting service.
If someone buys one of these today I will point one of mine at the purchasers pool in 1 hour so there is no delay from purchase until the hosting documents are signed and a unit is set up in the QCBTCM hosting area at Colohub.

 Also doing the simple math from what I paid in BTC 4 weeks ago, and getting paid in BTC now My markup/profit is .15 BTC per unit. A little less after paying shipping.

If .15 BTC is a unfair markup or price gouging then I paid too much myself.

You are always welcome to make me a offer.
I would also consider partial trade in credit for used mining equipment.

Thanks  Smiley
42  Economy / Computer hardware / Re: [WTS] Antminer L3 250 MH Scrypt miners hosted included on: February 24, 2017, 02:59:47 AM
I really want to sell these hosted to offer the chance for some people new to Scrypt ASICSs to get if for a all inclusive price including power and a controlled environment.

Several people have contacted me today and just want the unit, hay I get it as Searing says spinning fans and blinking lights are an addiction.

The OP is updated to show $2375 including shipping FedEx shipping CONUS only.
 
43  Alternate cryptocurrencies / Mining (Altcoins) / Re: GPU MINING RIG taking fire on: February 24, 2017, 01:35:16 AM
Not to scare you guys, but I have now switched to gold and platinum rated ATX PSUs, and Platinum rated Server PSUs for ASIC's and GPU rigs.

I also run them at load of 60% of the rated capacity.  This keeps things cool and quiet.

Here is a picture from before I knew what I know now and was trying to save some money.

Wood is also not good.  Shocked

i don't know how those PSU's get their proper exhaust in your setup, a PSU even they are platinum or even titanium are still designed to release their heat to their surrounding...

anyway running them at ~60% can mitigate the lack of heat exhaust in your setup.

i'm speculating that the PSU that get burned may not have thermal protection (will shut off if it exceeds a certain temp)...since it doesn't have a proper exhaust, it just continued to run even the materials started to burn causing fire.   

In that set up the wood wall was a plane between the input and exhaust sides so the air was forced thru the components and the hot air was exhausted with a 6500 CFM fan.

However I don"t roll like that anymore, I have learned a lot since then.
Here is my updated setup:
[Imgur](http://i.imgur.com/IoVhSWX.jpg)
44  Alternate cryptocurrencies / Mining (Altcoins) / Re: GPU MINING RIG taking fire on: February 24, 2017, 01:27:21 AM
I also run them at load of 60% of the rated capacity.  This keeps things cool and quiet.

Many posts ago in this thread, discussed were functions that help prevent such damage such as current foldback limiting.  But when a PSU is grossly oversized, that protection function is compromised.  The PSU will simply pump out excessive current without triggering protection.

Power supply designs are why, for example, some supplies are under greatest stress when at 50% capacity. Under least stress when at 0% or 100% capacity.  To say more requires numeric specification unique to that PSU.  Without numbers, then the 60% capacity to keep it cool is only wild speculation justified by feelings - not facts.

Same applies to fans.  Too many fans create reliability problems.  Fans must be selected based upon power consumption, acceptable hardware temperatures, and CFM.  Those numbers designed for what must be a good room temperature for any computer - ie 100 degrees F.

Since most who assemble computers do not know how electricity works, then computer assemblers are told to buy a PSU double what is required.  Then help lines are not clogged teaching how electricity works.  Only way to know a power consumption number is measuring with tools that any layman or pre teen can use.  On-line calculators are mostly useless.


@ Westom.  Most ATX PSUs are designed with the specification of a typical load of about 50%. The 50% to 60% area is where you have the greatest efficiency and least stress. Also ATX PSUs are usually not designed for 24 HRS a day duty cycles.

Server PSUs are also designed with peak efficiency in the 50% to 60%, but can run higher with less decay in efficiency compared to a ATX psu, and are designed for a continuous duty cycle.  I do agree that at a 20% load or less you are placing more stress on a PSU and you have much lower efficiency.

I would like to point out that everything I am stating here is not "wild speculation justified be feelings - not facts"  It is actually based on facts. I have done extensive research and my statements about computer power supplies are based on the 80% certification and evaluation reports from Plug Load Solutions.

I measure and monitor the actual power consumption of test set ups, and then build multiples of the same set up over and over. I further have the ability to measure input feeds and per outlet power consumption.

This way I can run my equipment at the sweet spot (most efficient and lowest stress).

Since I treat mining as a business and power is my biggest expense, I monitor it closely. 
I also want to reduce the possibility of damage to equipment and down time, so maybe I do a little more research that the average person.

You can look up the specs on your own PSUs here:

https://www.plugloadsolutions.com/80PlusPowerSupplies.aspx

45  Alternate cryptocurrencies / Mining (Altcoins) / Re: Longterm Mining on: February 23, 2017, 07:41:45 PM
What is the total Amps of power you can receive through your electrical service?

You should not run a load including your other usage besides mining of more that 80% of the service capacity.

This will determine the amount of rigs you can run.

I have a few customers I sold mining equipment to that have flat fee power in the US (think boat slips or RV), but they could only run a few rigs besides there other power needs.

Your fixed power costs is a great benefit to you for mining. You should utilize it, but don't push the safe limits.

   
46  Alternate cryptocurrencies / Mining (Altcoins) / Re: GPU MINING RIG taking fire on: February 23, 2017, 07:21:46 PM
Not to scare you guys, but I have now switched to gold and platinum rated ATX PSUs, and Platinum rated Server PSUs for ASIC's and GPU rigs.

I also run them at load of 60% of the rated capacity.  This keeps things cool and quiet.

Here is a picture from before I knew what I know now and was trying to save some money.





Wood is also not good.  Shocked
47  Alternate cryptocurrencies / Mining (Altcoins) / Re: Antminer L3 - 250mh - 400watt Scrypt miner coming soon on: February 23, 2017, 07:00:18 PM
I have a limited supply of Hosted L3s for sale!

See the marketplace for details:

 https://bitcointalk.org/index.php?topic=1802108.0

48  Economy / Computer hardware / [SOLD] Antminer L3 250 MH Scrypt miners hosted included. on: February 23, 2017, 06:57:01 PM
I am selling a limited supply of L3 Scrypt miners with hosting prepaid at the Colohub data center where I have my my mining farm located.

I will prepay Btcmeqc in full for the hosting period upfront.

The Hosting will be provided by  http://www.btcmeqc.com  user id on Bitcointalk is Colohub.
You will need to sign the hosting agreement with BTCMEQC and follow there rules, such as no overclocking.
  
During the initial hosting period I will provide the use of a 1000watt PSU.

I will also guarantee a operating miner within factory specs during the initial prepaid period. This guarantee will only be honored by a replacement with one from one of my running L3 units.  

After the purchase and payment for the miner you will have 0$ monthly costs, No shipping to pay, No PSU to purchase, No power bill to pay, No internet fees, and No maintenance fees for the duration of the initial hosting period.

After the initial hosting period you can continue the hosting with Btcmeqc, and rent the PSU for $5.00 per month, or pay to ship the miner to yourself or someone else if you are selling it at that time.
At the end of the hosting period I will ship FedEx in the original box anywhere CONUS for $25

Antminer L3 with 6 months prepaid hosting $2,500 4/1/17 -$100 Now $2,400 SOLD

Antminer L3 with 12 months prepaid hosting $2,650 4/1/17 -100 Now $2,550 (Best Value)     SOLD

Antminer L3 Non Hosted shipped straight to you now $2,375 4/1/17 -$100  Now $2,275 Shipping included CONUS only.  SOLD


SPECIAL PRICE ENDS TODAY AT 11:59 PM CENTRAL US  SOLD

Crypto is the only accepted payment method.

PM if interested    







[Imgur](http://i.imgur.com/gFoeMkg.jpg)

[Imgur](http://i.imgur.com/zGZisTh.jpg)



 
49  Alternate cryptocurrencies / Mining (Altcoins) / Re: Antminer L3 - 250mh - 400watt Scrypt miner coming soon on: February 23, 2017, 03:27:46 PM
Actually I was thinking about "normal retail" ATX PSUs - without adapters. Any suggestions would be appreciated.

I usually like to use server PSUs for miners that require a heavy load. Since the L3 only requires about 400 Watts across 4 board connections, and 1 controller/fan connection a good rated ATX is fine.
I recommend a gold or platinum rated PSU running a load at 1/2 its capacity. so for a 400 Watt load a 850watt or higher PSU.  The EVGA Supernova G2 1000 gold rated PSU is actually Platinum certified.
I have a few of these that I can sell for $100 + shipping. Pm Me if interested.
   
50  Economy / Computer hardware / Re: [WTS] KNC Titan 4 point cooler mount modification bracket kits + Taco Preventer on: February 02, 2017, 12:49:15 AM
**New Difficulty Special***

Free Shipping in the US on all orders of 4 or more bracket kits!

I also have heatsink kits available for $8 per cube with the purchase of Bracket Kit.

Thanks!
51  Alternate cryptocurrencies / Mining (Altcoins) / Re: my seasonic platinum power supply charred and broken, just share my experience on: January 26, 2017, 09:16:31 PM
some day ago i got a problem in my zcash rig, only 1vga showing from total 4vga, can't showing my 3vga, trying to check anything, any cable its woking perfect, then im trying to put my vga directly on motherboard not using pcie riser, and the vga normally working perfect.
so im check the power supply and i found this

1 of my pcie (sata pin connector) get charred and brokken after i force to take the cable, and the cable is burned out.
im still happy other pin stil working perfect.

for all miner i recomendation some instruction :
1. dont use 1 pin cable for supply more than 2 sata pcie riser
2. don't use low power supply to supply pcie riser, even if you use other big power supply to give power vga.

Thanks

You call that Charred and Broken?

Call me when you have one that looks like this:





Now that is Charred and Broken!
I have since switced to server PSU that are rated for 24/7 operation.
 
52  Alternate cryptocurrencies / Mining (Altcoins) / Re: Antminer L3 - 250mh - 400watt Scrypt miner coming soon on: January 26, 2017, 08:38:04 PM


 And since when does Iowa have data halls? The main reason I moved OUT of Iowa was the expensive(ish) electric.

ColoHub is located in Iowa. They are offering hosting right now at $55 per KW per month.

This is where I have my farm, and lucky for me its 2 miles from my house.

Here is their Miner Hosting/Data Center Thread:

 https://bitcointalk.org/index.php?topic=1709887.msg17132668#msg17132668

53  Economy / Services / Re: Miner Hosting/Data Center Colocation on: January 23, 2017, 11:05:33 PM
Hello everyone,
I can verify that the Colohub facility is as nice as it sounds, and that the staff is professional.

I have had my KnC Titans, A4s and Gpu Rigs and my server there for over 6 months.

Searing and myself met with them last summer and toured the facility when we were buying some of the KnC Bankruptcy Estate Titans
and trying to figure out where we were going to put them.

The staff there is knowledgeable and helpful and experienced with cryptocurrency and miners. There staff is a wiz at building and setting up gpu rigs.   

Tim and the other staff members there were a great help to me in getting set up there.
 
Its also a great bonus for me that it is less than 2 miles from my front door!

Mark
54  Alternate cryptocurrencies / Mining (Altcoins) / Re: Looking like the ZEC party is over on: November 23, 2016, 07:29:38 PM
[

Also, it looks like the 50$ range is kind of the current resistance price for ZEC, I haven't seen it drop below that
[/quote]

Not to split hairs but if the resistance is below you its called support price or level. I know you know what you meant, but lets help the newbies to technical trading.


A support level is a level where the price tends to find support as it falls. This means the price is more likely to "bounce" off this level rather than break through it. However, once the price has breached this level, by an amount exceeding some noise, it is likely to continue falling until meeting another support level.

A resistance level is the opposite of a support level. It is where the price tends to find resistance as it rises. This means the price is more likely to "bounce" off this level rather than break through it. However, once the price has breached this level, by an amount exceeding some noise, it is likely to continue rising until meeting another resistance level.

When  a support level is breached it is likely to become resistance level, and vise versa.

Technical analysis is based on history and we do not have enough history on ZEC to actually do any valuable analysis yet.

The approximately  $53 or .0722 BTC level appears to be support at this time. Typically this level will need to be retested, maybe several times.

What is interesting is that we have a moving average cross over for the first time in ZEC existence on the 2HR charts.
It will be weeks, or even months before we will have usable data on the daily charts, unless you are just looking for the downward trend to continue, but this could be about as dangerous as pre selling ZEC tokens before it launched at $.09.

Until we have a longer price data time frame, and we reach full block reward the best gauge of price or value will be the ZEC mining profitability VS ETH mining profitability from a miners prospective, and at this point what else do we have.

I know the profitability does not absolutely dictate price, but it will raise and lower hashrate to keep ZEC profitability at a approximate parity to ETH profitability.

I believe that this will be the case near term until utilization, store of value, or something else takes over.    

Just my .02705 mBTC  
  
55  Alternate cryptocurrencies / Mining (Altcoins) / Re: [Mining OS] SimpleMining.net - 95-178sol/s + v1032 Temp/Fan settings on: November 17, 2016, 02:48:29 AM
would it be possible to intergrate a CPU miner in the os?
some of my nicehash rigs make a bit off the cpu lately (Zcash) 
i know it dosent make much but every bit of profit counts.

just a thought.

great work up to date, thinks are looking good Smiley

The last time I used the Silentarmy v5 choice in SimpleMining it was also mining with the CPU alongside the GPUs

56  Alternate cryptocurrencies / Mining (Altcoins) / Re: A2 MEGA 110MH PSU Failure on: November 16, 2016, 09:25:45 PM
With the Corsair I have just confirmed that the original A2 Power cables will work with the same modification where you cut the spline of plastic on the cable connector between the 2 pins just left of the clip with the clip up and the connector facing away from you.

This way you can use the existing A2 power cables if they are in good shape.

Thats all my modification is. Cutting out this plastic webbing so there are 8 individual pins. that webbing is to prevent this cable to be installed in a PSU where the PCI-E connector have 3 power and 5 ground. In both the Corsair & BFL they are 4 ground & 4 Power at the PSU with power at the clip side of the connector.
I cut the plastic webbing on the power cable connector with a hacksaw blade, and clean it up with a utility knife so it goes in easy and the retention clip is engaged.

Alway use a multi-meter to test the power output to each pin when mixing or matching power cables and PSU!

57  Alternate cryptocurrencies / Mining (Altcoins) / Re: A2 MEGA 110MH PSU Failure on: November 16, 2016, 08:18:25 PM
How is this for a match made in Hell.  A Innosilicon a2 mated with a BFL PSU?
I have already created several of these Devil spawn.

Butterfly Labs BFL 1250W 80+ Gold ATX Fully Modular Power Supply New Sealed Box. $100 + $16 shipping.

http://www.ebay.com/itm/Butterfly-Labs-BFL-1250W-80-Gold-ATX-Fully-Modular-Power-Supply-New-Sealed-Box-/162251676596?hash=item25c6f41bb4:g:1TkAAOSwnGJWT4H1

It has 6 8 pin PCI-E connector ports, the voltage passes through with power to the 4 pins on the clip side of the connector at the card. additionally if you have a bad cable you can use one of the 2 CPU cables that comes with the PSU.

You just need to cut the spline between pin 5 & 6 on the A2s power connector so it will go in the PSU.   

Works like a charm, and the price is right.

Good Luck!
58  Alternate cryptocurrencies / Mining (Altcoins) / Re: [Mining OS] SimpleMining.net - new miner 90-170sol/s on: November 12, 2016, 10:37:13 PM
The update it automatic. just download  R series v1019 if your cards are 2xx, 3xx. and RX series v1019 if your cards are 4xx.

it will auto update from there quickly in minuets.
59  Alternate cryptocurrencies / Mining (Altcoins) / Re: RX480 (Reference) 31+Mh, Custom Rom on: November 12, 2016, 08:11:40 PM
At Fensgold:

You can get 75 SOL on a stock RX480 at the moment using Silentarmy V5 or with Simplemining using the Silentarmy mining option.
60  Bitcoin / Hardware / Re: Spondoolies SP30 Loop Errors ? on: November 07, 2016, 08:00:27 PM
Go into the settings and disable loop 3. Also check your temps and make sure you are below 120 temp. I think that 125 is the limit to where its cuts off.
Have you updated the firmware to 2.7.1? I think that its the latest and available on the spondoolies Bitcointalk thread.
I have found for them to run continuous without stopping you need to bypass or disable bad loops, and up the fan speed and, or throttle back loops to keep them 100 to 115 temp.
 
Pages: « 1 2 [3] 4 5 »
Sponsored by , a Bitcoin-accepting VPN.
Powered by MySQL Powered by PHP Powered by SMF 1.1.19 | SMF © 2006-2009, Simple Machines Valid XHTML 1.0! Valid CSS!