[CLOSED] ASICMiner Prisma 1.4th/s - 1.47 BTC

[ferncreekminer]

I'm planning on using 2 x EVGA G2 750Watt PSU per Prisma miner; the 750W has 4 PCIE connectors - so 2 per hashboard isn't a problem.

If anyone is looking for a good deal Amazon has the best price currently; plus their MiR is good for 2 PSUs.

if that is a split rail psu it won't work.  I have a 750 watter and it use up to 3 cables  on the fourth it overloads.  mine is a split rail model .  check and see if it is.

The EVGA G2 750W has a single 12V rail.

Happy to report that this setup is working very nice; seeing around 1445-1460GH/s pulling 1195-1205W at the wall.

The Prisma had shifted a bit inside the foam padding, had 2 handles slightly bent (no damage to the boards) that had to be straightened a bit to be able to plug in the power connectors, the fan screws were loose & a screw was missing opposite side of the fan (found it in the box under the foam padding). Miner up and running within 15 minutes of USPS delivering the box.

Extremely pleased; thanks for organizing the GB CrazyGuy!

After approx 13 hrs of hashing - killawatt bouncing around 1185-1197W.

[Xtra7973]

I wanted to use a HP DPS 1200W until the revised power consumtion reported.  My Back up is 2 HP DPS 800s.  I am a bit concerned about the power draw.  Has anybody tried 240V yet?

I am in the same boat. I was going to use my ax1200i but that isnt going to happen now with the new numbers. I bought one evga 1300 from phillip and now I am going to have to grab another one I guess, http://www.amazon.com/EVGA-SuperNOVA-1300G2-ATX12V-120-G2-1300-XR/dp/B00COIZTZM/ref=sr_1_1?ie=UTF8&qid=1414156713&sr=8-1&keywords=evga+1300 amazon seems to be the cheapest. My only problem is finding extra wires to power it. On evga's website they have them listed but they are sold out, also they are $90.00 that's expensive. Time to keep looking I suppose.

[philipma1957]

Thanks CrazyGuy, I now have 4 prismas connected to one BE cube that is chugging away the past 2 hours now without problems. I needed the dip switch info for sure. Straight forward install, everything there and even a few extra cables. Sweet more stuff for the parts drawer.




Apologies for the dark pic. But you can see I am powering 4 prismas using two stacked 2000watt IBM DPS2000BB power supplies with Sidehack's awesome breakout board and his cables 1 PCI-E per hashing board (which I admit are a little long for this layout). Cables are not hot or warmer than outside environment. I had a little mishap that involved grounding metal to some parts of a hashing board with pops and sparks but that board is chugging away anyhow  

The tubes do give off a lot of heat, more than the S3 for sure, but just a bit more than a S1. Most of the heat is coming from the stacked power supplies pushing ~4500watts combined. (not confirmed soon I will obtain some recycled PDU's that meter each outlet  ) I used the two fans that came with my older S2 kit for the power supplies, one to push, one to pull. One just one wasn't enough it would overheat and shut off.

Pool side reporting 5.7Ths past 1hour, difficulty at 4096.

try setting them to freq 230.  I did extensive testing and used the short tubes for about a month.

your numbers show me that you are running too hot. and maybe under powered.  you can tell by your

Real Performance: 5482.83GHS vs Expected Performance: 5898.24GHS  

92.96%

If you have enough power and are cool enough you run at 98 to 101%.

here I am overclocked  with 2 short tubes. but I used 2 fans and had robust power supply overclock was 280 vs 270 stock



here is a 290 clock. using two fans and handles out not in





second fan added handles out.  handles out takes heat further away from the chips.  no question 2 fans and handles out helps units to be cooler.

[GrapeApe]

I have a couple of extra Dell 750psu's with breakout boards and cables (from sidehack). They are loud but no louder than the Prisma. 2 of them will power 1 Prisma easy with all 8 cables.

I've polluted this thread enough so if interested please PM me .      

.33BTC for 2 of them. PSUs, Boards and Cables

EDIT: Hey Phillipma1957 which fan is that and did it slow down the original at all or does still stay ramped up?

[LordPaco]

So here is the overnight update:

@philipma1957 - I think you are right here, either not enough power or too hot, probably the first.

One of my 30amp 240v breakers tripped shutting off a PDU, so I moved one of the power supplies to another pdu. Problem solved but demonstrates the power these guys drink.

At 240 freq it worked for about 3 hours then slowly the hash would decline, I thought one of power supplies may have overheated but when I checked everything looked fine. Hitting the 'resession' button on the be controller set everything back on que again. Then within several hours same thing.

At 250 freq it worked or about an hour then I had the same problem of the hash rate declining until I hit the 'resession' button. Hash rate did not increase.

At 230 freq it is still working for the past 6 hours with no hash rate decline and it matches the ghs that is to be expected. Curious if this helps with power usage at all, but really hoping it stays this way I'm not in a position to be hitting buttons multiple times a day. So far so good crossing my fingers.

[edit] seems to be generating a lot of duplicate shares is this normal?, Also I think 2048 may be a better diff setting for 4x prisma.

[helipotte]

At one site I have two tubes running "broken down".  What I did is detach the hashing modules from each other and install standoffs on the board side.  They sit flat.

Then I attached one 120mm fan to each one.  They stay at about 40c and 99.5% of expected performance.  Also super quiet as the fans are running off of 5vdc!

The disadvantage is they take up more space this way.

[TracerX]

At one site I have two tubes running "broken down".  What I did is detach the hashing modules from each other and install standoffs on the board side.  They sit flat.

Then I attached one 120mm fan to each one.  They stay at about 40c and 99.5% of expected performance.  Also super quiet as the fans are running off of 5vdc!

The disadvantage is they take up more space this way.

I'm interested to see the design--can you post a pic if we ask nicely?

[philipma1957]

At one site I have two tubes running "broken down".  What I did is detach the hashing modules from each other and install standoffs on the board side.  They sit flat.

Then I attached one 120mm fan to each one.  They stay at about 40c and 99.5% of expected performance.  Also super quiet as the fans are running off of 5vdc!

The disadvantage is they take up more space this way.

I'm interested to see the design--can you post a pic if we ask nicely?

yeah . I would like to see it.

 also at   crazyguy   a 1 board piece could be a good seller.

  sell the board
 the heat sink
 the thermal pad
adapter plug
sd image card

 I would buy that .

It should do 325-375gh

  use 250-300 watts. 

could be made to be very quiet with fans.

[helipotte]

Like this:




Temp is monitored by fan controller.

Nice and quiet.

[jelin1984]

The prisma miner is noisy???.

[wasikidding]

The prisma miner is noisy???.

It has been noted the fan will produce 70db + so yeah

[philipma1957]

I have a couple of extra Dell 750psu's with breakout boards and cables (from sidehack). They are loud but no louder than the Prisma. 2 of them will power 1 Prisma easy with all 8 cables.

I've polluted this thread enough so if interested please PM me .      

.33BTC for 2 of them. PSUs, Boards and Cables

EDIT: Hey Phillipma1957 which fan is that and did it slow down the original at all or does still stay ramped up?

that is a great fan 140 mm  made to fit 120 mm    quiet  but it did not make the stock fan slower.

I wire the stock fan to a fan controller that fixed noise.

link for fan

http://www.amazon.com/gp/product/B00A460TK6/ref=oh_aui_detailpage_o04_s00?ie=UTF8&psc=1

Many times I pull one   s-3 stock fan and add this works well for that too.

[GrapeApe]

Well I don't know why I didn't think of that, even after seeing the image of the one above taken apart. God damn fan controller!!! I just went and got one and yes it does help quiet it down some. I am ordering some extra fans for the push pull effect and with the controller the sound should be manageable now.

[philipma1957]

Well I don't know why I didn't think of that, even after seeing the image of the one above taken apart. God damn fan controller!!! I just went and got one and yes it does help quiet it down some. I am ordering some extra fans for the push pull effect and with the controller the sound should be manageable now.

 just so you don't overheat please drop freq down until you get the second fan.  

try 230 or 220.

 somewhere on the short tube thread there are photo of burnt out  tubes.  

we basically turned the handles out  and did 2 fans for anyone of us that did this temps went down.  and the % of good hash got close to 98-101

good info on freqs for the short tubes below

https://bitcointalk.org/index.php?topic=735982.msg8544454#msg8544454


handles out 2 fans good photos

https://bitcointalk.org/index.php?topic=735982.msg8613806#msg8613806

[GrapeApe]

Well I don't know why I didn't think of that, even after seeing the image of the one above taken apart. God damn fan controller!!! I just went and got one and yes it does help quiet it down some. I am ordering some extra fans for the push pull effect and with the controller the sound should be manageable now.

 just so you don't overheat please drop freq down until you get the second fan.  

try 230 or 220.

 somewhere on the short tube thread there are photo of burnt out  tubes.  

we basically turned the handles out  and did 2 fans for anyone of us that did this temps went down.  and the % of good hash got close to 98-101

good info on freqs for the short tubes below

https://bitcointalk.org/index.php?topic=735982.msg8544454#msg8544454


handles out 2 fans good photos

https://bitcointalk.org/index.php?topic=735982.msg8613806#msg8613806

Yep already ahead of you I dropped it down to 230. The other fans will be here next week but this is a huge improvement (noise reduction).

[mrpark]

I got my prisma and controller today. packed well, looks great. My wife was thinking I was crazy getting a package from "crazyguy"

2 newbie questions about the block errupter.

1) where do I plug in to the prisma?
2) I am using a 12v 6 amp connector that fits. Is that safe to use? it says 5v but does not mention how many amps....

[CrazyGuy]

I got my prisma and controller today. packed well, looks great. My wife was thinking I was crazy getting a package from "crazyguy"

2 newbie questions about the block errupter.

1) where do I plug in to the prisma?
2) I am using a 12v 6 amp connector that fits. Is that safe to use? it says 5v but does not mention how many amps....

As long as you are over 1 amp, you are good, It will only pull what it needs. Hook in to the uart1 port on the controller and check out the second post in this thread for further details on setting the switches etc...

[Blazed]

If I pay today what is estimated time I would receive a Prisma ?

[philipma1957]

If I pay today what is estimated time I would receive a Prisma ?

  Along the lines of this question.

 When will you have one on asicpuppy?

[CrazyGuy]

If I pay today what is estimated time I would receive a Prisma ?

  Along the lines of this question.

 When will you have one on asicpuppy?

I hope to have some up on ASICPuppy next week, with the arrival of batch 2. The unfortunate story of batch 2 is that they shipped without a commercial invoice, and were denied entry by customs. They are being reshipped...