It is good gear if you can host it in the right place. Selling it was not a bad idea on your part.

I am  happy to mine here.

it was  my feeble attempt to add to your joke. internet jokes can fail sorry as i thought yours was funny enough to add to more to it.

dude go out walk around the block then check for a new block. 

Like to like should work well. If you jog around the block it will hit quicker.

corrected pardon my lack of memory.

I have tossed 50 th at it for the next 4 hours.

I have the best single psu you can get to runs this (money no object)  the evga 1600 watt platinum psu.

At setting 22=  freq 230 (slight underclock)  this gear does great.  I get 88.727gh x 16 = 1420 gh  with 2.63% errors poolside at mmpool.org  it is about 1400gh watts

watts bounce from 1100 to 1130 on a kill-a-watt   

so best number is  1100/1420 = .7746 watts at the k-watt-meter 
worst number is 1130/1400 =    .8071 watts at the k-watt-meter   


 the psu can do 1600 watts and it cost me 300 usd .
with a 10year warranty I plan to use it in some type of mining for years to come.

This prisma really needs quality power supply and good cooling. 

I can only  manage  the heat correctly  with an open door setup. 

Thoughts are this you need to be a little more advanced to use this then an s-3.
It is loud.
For now I will not run this if I am not at home  as my mining area can't quite be made fire resistant.

If you can set this in an outside building  with proper cooling it is pretty nice.
You avoid the sound problems.
You avoid the burn up risk .

If you are an apartment person this is a no go.



@ crazyguy 

I sent a pm today with a few questions . Please let me know if you got it.
 

Thanks phil

 My s-3's have been good.

 But the prisma scares me. I am in NJ , USA It mines in my garage when I open the back door to let in cold air and blow the hot air out temps run well. Once I close the garage door it gets hot. The minera software on the rasp pi is weird the underclocks creep up. in hash in heat and in watts.

My thought was run the prisma at:

 freq 230 garage door open   ---- works great no problems
 freq 200 garage door closed ---- works weird 
 freq 190 garage door closed ---- works weird
 freq 180 garage door closed ---- works weird

the underclocks also work weird if I 
do them with garage door open. 
They don't go slow which means they get hot.

If I can't get it to underclock well  I won't be able to run it when I am not home.

 If he takes paypal any buyer is protected it is a small buy it should be safe.

Just don't pay him with anything but paypal.

If he does right by the 4 paypal buyers it would be a start.

  I am USA based I do not want to do escrow for this.
  I do own one of these and I can tell you these are not set it and forget it.  They like cool air need room to breath and are loud.

read this thread  to be sure you want one of these as they are harder to do then s-3's

https://bitcointalk.org/index.php?topic=795477.0


mine is running here. I am using an older version of minera  so take the  89gh and x 16 = 1424 on an underclock to freq 230 vs 240  .  but to keep unit cool I keep my garage door open.

 temp is 88f  or 31c next to the miner.  I use a rasp pi to run it.   my outside temp is 44 f or 7 c     without the door open gear warms up a lot.

Yeah I think low growth is sticking around for now.

Yeah the am prisma crashed and I had no other gear pointed at that pool.

I am not sure I want to keep this prisma it is temperamental.

well don't know why but diff dropped just a bit over night .

todays numbers at

https://bitcoinwisdom.com/bitcoin/difficulty   >>>>>>>>>> (+1.98%)

BTC = 397 USD

Bitcoin Difficulty:   39,603,666,252
Estimated Next Difficulty:   40,385,955,869 (+1.98%)
Adjust time:   After 205 Blocks, About 1.4 days
Hashrate(?):   290,064,664 GH/s
Block Generation Time(?):   
1 block: 10.0 minutes
3 blocks: 29.9 minutes
6 blocks: 59.8 minutes


and at http://www.bitcoincharts.com  >>>>>>>>>>>>> (+1.81%)

Blocks   330419
Total BTC   13.511M
 
Difficulty   39603666252
Estimated   40324260391 in 205 blks
 
Network total   305024.736 Thash/s
Blocks/hour   6.46 / 558 s


so with a little more then 1 day to go diff may be 2%.  I had thought it would be more like 4 or 5%

this is a winner take all pool.  the size of the it  has no meaning to an individual miner.

 for sake of argument pool is 2ph or a block a day with normal luck.  it is made up of 1200 sp20's .   when one of them hits that block it is theirs alone.   since the pool hits a block a day with normal luck the chance of your sp20 would be about 1200 to 1 your payout would be 24.875 btc . the rest goes to CK.

If you solo mine by yourself in your home with that 1 sp20  your chance is still 1200 to one.  the advantage to using CK's pool is no maintenance of a server to run the blockchain to mine on it.

Every 'small' miner should toss some gear here not a lot but some.  I run 1 defective s-3 here with ⅓ of the hash the other ⅔ goes to Btcguild.

I have I guess 99gh mining here.  the s-3 has 2 dead chips send 99gh here and 260gh to btcguild

so my little 99gh has a 1 in 20,000 chance at a block for today at today's diff numbers.  
no hard work and with the s-3 load balanced it still earns money with btcguild

many moons ago I had gridseed  build worked for 2-3 months then stopped on wemineltc. still worked on cex.io   a suggestion try 2 or 3 or 4 other pools

they stay pretty much in lock step. my freq 190 goes to 1225gh and 990-1005 watts.  so far every setting gets about .83 watts once you figure in the error ratings.

this is an sp20 thread. I don't want to clutter it with asicminer data but  right now I only have the asic miner.    I will do plenty of sp20 data once I get it.  I have pretty much a top of the line psu the evga 1600 p2
so my asic miner data will all be best case as will my sp20 when I get it.

I just stopped my freq 260 testing and am now trying freq 220 with the asic miner (slight under clock)   I had short tubes form asic miner and found they liked a slight under clock.


I am still of the opinion that the sp20 is a better deal and while people are comparing them at 600 vs 900 usd   my cost due to btc  price shifts   was 637 am vs 834  sp20.     so I am working with a 197 usd price difference.

Not 300 as some would be.

the prisma does .8 watts a gh at :

freq 190
freq 200
freq 210
freq 220
freq 230
freq 240
freq 250
freq 260

I have been testing for days.

 I can't tell you what a sp20 does I don't possess it yet.  but on the website they claim 1100 watts at 1700 gh or just under .65 watts

edit they claim 1152 watts and 1.7 gh

right now I am doing 1588 gh with 1215-1254 watts and errors of 8% on the  am prisma.  so I am netting 1453 at the pool.

1215/1453 = .83
1215/1588 = .76

1254/1453 = .86
1254/1588 = .79
so at freq 260 oc       you are over .83 if you count the pool stats.


I have been testing to determine best setting.
current numbers below   are freq 260.  I am inclined to want sp20-'s over am prisma's   but to be fair I have to run the sp20 to be sure.

Yes as I type this right now I am on another pc buying a coin from coin base. If it was 1849 buying a gold nugget would take time and effort.

 BTC has lots of advantages  over gold nuggets or bars.

Mining crypto coins will stick around for years to come since it offers  the ability to stash cash in the cloud. Is an inflation hedge and many other things.

I mine for fun since I will never be able to mine in house with big volume ever again.  I also buy BTC in order to make money. In order to have an inflationary edge.
In order to have more then the clothes on my back if I ever feel I need to run.

16 x 95.5 = 1528  this version is a little bit older but it seems to be better then the new one.  poolside I am doing 1428


since error rate is 6%

 94 x 1528 = 1436  so   those are close  with rounding etc.

I own 8 s-3's.
 I own 1 asic miner prisma.

I purchased 1 sp20.  I always wanted one from spondoolies.

The asic miner prisma is very loud has had more then one documented melt down.

Cost is 1.47 x  387 = 568 usd   plus 30 usd to ship total of 600 usd  it uses same psu as the sp20


the sp20 is 835 shipped to the usa if you can find a promo for it.        so the price difference is 235 usd.   with btc moving in price I paid 200 usd different  for my two order.

the best I can do with the asic miner  prisma is 1545 ch at 1235 watts  .  this is .799 watts  per gh


the sp20 should do .65 per gh  or better.   .65 vs .80 is a big difference.

I see you have the rpi B model with a case, I have the B+ no case, my temps were always around 84.00F max usually always around 80.00F, last night I logged into the pi and overclocked the pi's frequency to 450mhz without upping the voltage, just to see if anything changed with the hash rates or to see if the BET0 or the new BET1 errors I was getting on reboot/restart would go away. Since I overclocked it the only thing ive noticed is the slight temp increase to 88.00F and a slight, probably just by chance, lower rejection rate, not enough lower rejection rate to say it solved anything. But I have never seen my pi B+ get anywhere close to some of those temps you had. Do you think with the case on it maybe trapping some heat inside it? In two of your pictures I noticed one said 102.00F and the other said 104.00F. Was that before the fans? I have my pi sitting next to one prisma, right below them on the next shelf down is a window box fan blowing air up to keep the bottom of the prismas cool. Also two fans per prisma, push/pull, and one fan between the prismas blowing air down the middle of them. So I guess I was getting lucky with the placement of the pi as its getting cool from the box fan below it. I just wish we had a way to get the true temps of these prismas while running. I have a laser thermal gun, but the temps are sporadic depending where I point it at. The exhaust fans are around 120F on both units consistently. I am running them right now with no overclock as im worried because of the pictures posted. Better safe than sorry. Does anyone know if there is a way to find the true temps these prismas are running at? Are they even capable of giving us that information?
[/quote]

 with garage closed the rpi runs 105-107 f  with garage open it runs  78 to 90 f depending on the clock.

I have added ceramic tiles under the prisma just in case.
I still can't seem to tame the temps with the  door shut.  I have clocked down to freq 190 and door shut I get to  1050 watts from 990 open in just a few hours.


_______________________________________________________________________________ _______________________________________________________________________________ _______________________________________________________________________________ ________________________

On the oc side  with the colder 40f weather  and door open gear is nice. This is freq 260

hash at 1545 gh watts at 1250    using top end evga 1600 p2 psu    so these are kind of as good as it gets for power


in f and c temps are great.

in f


in c



ceramic tiles over a piece of laminate flooring


low watts with door cooling in effect  freq 260 hash 1545 errors 6.96%   1216/1545 = 0.787 at the meter plug



high watts with door cooling in effect freq 260 hash 1545 errors 6.96% 1254/1545 = 0.811 at the meter plug