Swedish ASIC miner company kncminer.com

[Zelek Uther]

I can see why jelin was so frustrated with the AX1200i. It won't even power one Neptune module plus controller... the Over Current Protection (OCP) kicks in and the PSU shuts down.

As annoying as this is, it is a safety feature as it would normally be unusual to draw that much current through a single PCIe cable. So i blame KnC for not putting two PCIe jacks on each module, rather than Corsair for their smart PSU. Bitmain put two PCIe jacks on each S3 blade, but it turns out only one is needed. That's a forward thinking design (in case the BM1382 28nm chip needed the power) - KnC take note.

Corsair link software lets you increase the OCP limit which fixes the problem... BUT the link cable is designed to plug into a motherboard USB pin header, not into a USB port (which makes sense as the PSU is designed to be inside a PC). Damn, I've only got a laptop.

I've got 2-to-1 PCIe cables ordered from Cablez, hopefully they will spread the Amps between two ports on the PSU and get around the OCP.

I'm also trying to source an EVGA 1300W superNOVA G2, but no luck yet finding one in New Zealand.

So my Neptune has been delivered, visually looks ok, but I can't power it on yet.

[Phoenix1969]

It didnt take Elenelen long to ramp right up to 500mhz with simple vrm heatsinks. Imagine what we could do if that cooling tower, thermal blanket, and that stupid bar were all gone, and replaced with an H2O cooler. the vrms, and any heatsink you put on them would then have excellent exposure to airflow.

[Airwhale]

It would have been really cool (no pun intended ) if they had stuck to the 4 chip design and single case, and went with water-cooling, and heat-sinks on the VRM's, the "bigger" VRM's... but it probably would have gobbled even more power. I think tho that the absence of the bulky cooling tower will also help the VRM's, especially if they had heatsinks to catch even more cooling action...

Still waiting for someone to slap on some H-80's and apply some "Padrino tweaks"....  

Yeah,  I agree.  Unfortunately, the limiting thing behind overclocking seems to be the VRMs,  which are already pushed close to the max.  They are rated for 40amps,  can be safely pushed to 48-50amps. (and of course,  adding another 6 pin connector,  but that's a relatively cheap and easy hack)  That's the neptune at normal wattage and 500mhz. I wish KnC wasn't so stingy with the things that are not the ASIC!

Unless you replace those VRMs,  better cooling can only get you so far.  

If they came with 50amp VRMs,  I would have slapped some nepton 280Ls on them and I'm guessing they could have been pushed up another 10-30%.  I'm wondering if KnC will do that for batch 3 of the neptunes,  just like batch 2 of the Jupiter had the performance bump.

Nah,  who am I kidding.  KnC wouldn't do that!  Every move they have done over the past three months except completely shipping out new super jupiters when they destroyed the first shipment has been to their customers detriment. 

[Airwhale]

I can see why jelin was so frustrated with the AX1200i. It won't even power one Neptune module plus controller... the Over Current Protection (OCP) kicks in and the PSU shuts down.

Just FYI,  the AX1200 (no i) works great,  if you have one of those around.  I think other folks have pushed the OCP way up on the iand had luck with that, also.

[Phoenix1969]

There was actually "Talk" early on about a dc/dc "Team" who was supposedly working on a custom solution if I remember correctly.... evidently that never transpired.

[Biffa]

Neptune card in Novec 7100.  This was just a quick test.  Hopefully I will have more numbers tomorrow.

[Airwhale]

FUN!!!! Please keep us posted!

[tolip_wen]

Neptune card in Novec 7100.  This was just a quick test.  Hopefully I will have more numbers tomorrow.

Sweet!
What do you do when the liquid gets hot? radiator?

YMMV

[Biffa]

Not me, smracer in this thread: https://bitcointalk.org/index.php?topic=7216.msg7644407#msg7644407

[Phoenix1969]

Hahaha... 2 cool.... Thanks Biffa

[The Avenger]

Neptune card in Novec 7100.  This was just a quick test.  Hopefully I will have more numbers tomorrow.

Awesome! So awesome I'm going to do a bunch of smileys like jelin  


Edit - he's now posted a video of card running in Novec 7100

I am using a much bigger box for my final unit and hopefully I can fit 20-25 Neptune cards in the box with a very large radiator.

I will add them 5 at a time until I can't dissipate the heat anymore.

Here is the video - https://www.youtube.com/watch?v=gk3Vydo-L58

[jelin1984]

What the f..... These thing is fantastic

Please step by step details

How we can do that 

[CYPER]

What the f..... These thing is fantastic

Please step by step details

How we can do that 

You get a big jar, fill it with tap water ans submerge the board in it.
Trust me, I am an engineer

[s1gs3gv]

Actually it currently takes 10 days with 3.3 TH/s to mine a bitcoin.

Can you imagine what its going to be like for the August/Sept SP30 customers ? Thats a few more diff changes down the road still ...

[crashoveride54902]

Actually it currently takes 10 days with 3.3 TH/s to mine a bitcoin.

Can you imagine what its going to be like for the August/Sept SP30 customers ? Thats a few more diff changes down the road still ...

pretty much screwed like all the rest of the preorders to date...only one that worked great was avalon preorder...everyone thinking they will get that kind of success

[redmetal]

Actually it currently takes 10 days with 3.3 TH/s to mine a bitcoin.

Can you imagine what its going to be like for the August/Sept SP30 customers ? Thats a few more diff changes down the road still ...

pretty much screwed like all the rest of the preorders to date...only one that worked great was avalon preorder...everyone thinking they will get that kind of success

I agree, Avalon first batch has been the only mining gear that has paid off way more than it cost. From here on in your lucky to break even at best. Unless someone comes up with a way to produce 1ph for around $10,000.

[samsonn25]

Actually it currently takes 10 days with 3.3 TH/s to mine a bitcoin.

Can you imagine what its going to be like for the August/Sept SP30 customers ? Thats a few more diff changes down the road still ...

ROI  3-4 BTC

[Phoenix1969]

Actually it currently takes 10 days with 3.3 TH/s to mine a bitcoin.

Can you imagine what its going to be like for the August/Sept SP30 customers ? Thats a few more diff changes down the road still ...

pretty much screwed like all the rest of the preorders to date...only one that worked great was avalon preorder...everyone thinking they will get that kind of success

I agree, Avalon first batch has been the only mining gear that has paid off way more than it cost. From here on in your lucky to break even at best. Unless someone comes up with a way to produce 1ph for around $10,000.

Not true... Many of us mined around 50 coin per Jupiter... just so you know....
with all the problems I had with Jupiters, it was worth every red cent imho.

... and Yifu Guo was no angel. There were a lucky few who got Avalons early, but make no mistake,
Avalon is just as guilty(or more) when it comes to orders which were delivered late.

http://www.coindesk.com/avalon-asic-customer-bitcoin-refunds-delivery-delays/

https://bitcointalk.org/index.php?topic=294234.0   Avalon chips refund not received - Lawsuit action proposal

http://www.reddit.com/r/Bitcoin/comments/1jwraw/1400000000_in_avalon_chips_missing_and_you/  "Held in customs"  yeah, right.

Whatever gave you the idea Avalon was so "Golden"?  and after a good shafting from Avalon, I bought from BFL.
Jupiter made up for all that, and more.

...but I agree.... Neptune, and every other miner screwed from here on out.... sad

 

[Syke]

Not true... Many of us mined around 50 coin per Jupiter... just so you know....

And it cost, what, 60 coins?

... and Yifu Guo was no angel. There were a lucky few who got Avalons early, but make no mistake,
Avalon is just as guilty(or more) when it comes to orders which were delivered late.

Most of batch-1 that was a big winner. Batch-2 was a toss up. Everything after that was a disaster.

[xstr8guy]

Wat? You're selling English lessons for BTC?  lol


no i need btc donation
for my english lesson

see my btc adress and donation some btc

untill now only 1 donation for my lessons
please donation some btc

maybe ask knc to daontion some btc

Wait, what?!

You've been mining BTC for a long time and you had $10k to buy a Neptune. But you can't afford to pay for your own English lessons?