Author Topic: Spinoff from my RAM based FPGA miner - 25Khs at 5W usb dongle - Scriptor Solo  (Read 1309977 times)

Offline beekeeper

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https://vimeo.com/76914502  8)
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Mod notes:
This thread is quite old and got split a few times, i'll keep the overview posted here - posts that belong to stlit off topics will be removed without comment

UPDATES THREAD ONLY
https://litecointalk.org/index.php?topic=24224


Reflinks, Resell Shops and co go here
https://litecointalk.org/index.php?topic=22683.0

Weekly payout discussion
https://litecointalk.org/index.php?topic=22563.0

"Is this legit?"
https://litecointalk.org/index.php?topic=22433.0

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https://litecointalk.org/index.php?topic=22653.0

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https://litecointalk.org/index.php?topic=22755.0

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User Balance Feature
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Cheers
Sy
« Last Edit: January 11, 2015, 02:20:14 AM by HauntingShade »

Offline Groovy

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Well-done. Really compact design too.

Scaling it up, I gather it uses a touch over half the Watt/kH of a GPU?

Do you mind sharing what model/size FPGA you have used?

Offline Sy

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That would indeed be a good number for a fpga, post some hardware details pls.

Offline beekeeper

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Hi,
No, I cant exactly tell what chip model is used.
However, to give you an idea, this is 8 cores Scriptor 8x Light:
http://ltcgear.com/wp-content/uploads/2013/10/scriptor_8x_cyclone_B.jpg
It is based on Altera Cyclone chips, but at this moment it cannot be sold because firmware cannot be protected with those Cyclone chips. But they do good material for a farm. ;)

The USB dongle is based on better chips than Cyclone.

Offline Sy

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So - are those 25 khs with one Cyclone chip or 8? *confused*

Offline beekeeper

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25Khs on one chip. On 8 chips its 240Khs (30Khs per chip).
Smaller board caps faster the KHs.

Offline worldlybedouin

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I'll signup to buy a dozen  :)

Looks promising...keep up the good work!

Offline kramble

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but jasinlee came out of no where without any proof and got mad when we asked about one, and the reason was" he is afraid that someone will steal his work" , can I steal this mans work ? I don't think so.

The problem (as Beekeeper has stated above) is that the devices do not support an encrypted bitstream. So once he releases them onto the market, any competitor could clone the boards and firmware (of course its illegal to copy the IP, but try chasing that up in court as a small business).

Myself I'd dearly like to know the actual Altera part used (so I can gauge how his firmware compares in performance to my own open source version), but I'm not holding my breath. Anyway good luck, its great to see more work being done openly in this field.

Offline thitha2907

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with asic affect on bitcoin you will never get ROI, or if you lucky you will get ROI and than your device generate cost but not value
 ;D
and with this dif, price, ROI for scrypt ASIC will be thousand years since today

btw OP, how many dollars for 1khash

Offline beekeeper

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with asic affect on bitcoin you will never get ROI, or if you lucky you will get ROI and than your device generate cost but not value
 ;D
and with this dif, price, ROI for scrypt ASIC will be thousand years since today

btw OP, how many dollars for 1khash

The USB dongle is closer to 2$/KHs, extra components and other costs distribute bad on just one chip. The 8 cores board its 1$/KHs. With current firmware. Future firmware would certainly improve this numbers.

Offline beekeeper

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Myself I'd dearly like to know the actual Altera part used (so I can gauge how his firmware compares in performance to my own open source version), but I'm not holding my breath. Anyway good luck, its great to see more work being done openly in this field.

I would not compare them directly. The firmware is designed to return some KHs but at the same time keep power usage at a decent number. I did download your design and looked over, maybe I am mistaking but you are not looking to design "power optimal".

Offline kramble

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I would not compare them directly. The firmware is designed to return some KHs but at the same time keep power usage at a decent number. I did download your design and looked over, maybe I am mistaking but you are not looking to design "power optimal".

Yes, I've just been trying to maximize the hash rate, and on a specific LX150 part at that (the two chips on my single Lancelot board), rather than designing for the full range of temperature/performance spread that a commercial bitstream would need to support. I gather that some other contributors have achieved good results on Altera devices using my design though. Its certainly not optimal power-wise, and the monolithic pipeline is probably not the best way to go about implementing scrypt.

I'd love to hear your professional criticism of my code (from a learning point of view, just being a novice at this I'd like to know how I can do better). Don't hold back, I can take the knocks  ;)

Offline beekeeper

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I'd love to hear your professional criticism of my code (from a learning point of view, just being a novice at this I'd like to know how I can do better). Don't hold back, I can take the knocks  ;)

Hi,
I am in no position to criticize your work, actually I have to congratulate you for the job done.
There are myriads of details you need to take in account when you designing for low power, but you need to take them in account early in your design or you may need to return later and change design drastically. Also, it is very possible that if you design for portability between FGPA families, you will miss features each family has for low power.
This is my experience, again, I am not a consultant and I am not pretending I know your design better than you know it. Earlier when I mentioned, it was just a superficial observation and I was rather curious to know if I am right or maybe I missed the picture entirely.

Offline kramble

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I am in no position to criticize your work, actually I have to congratulate you for the job done.
There are myriads of details you need to take in account when you designing for low power, but you need to take them in account early in your design or you may need to return later and change design drastically. Also, it is very possible that if you design for portability between FGPA families, you will miss features each family has for low power.
This is my experience, again, I am not a consultant and I am not pretending I know your design better than you know it. Earlier when I mentioned, it was just a superficial observation and I was rather curious to know if I am right or maybe I missed the picture entirely.

OK, no problem. Thanks for the kind words. It looks like you'll have some very willing customers if you bring it to market (they certainly seem keen on your bitcointalk thread).

Best of luck

Offline beekeeper

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Ok, we opened our shop, We waiting for feedback..
There is an hidden product which an be bought bulk only today,  en grossist.
« Last Edit: October 16, 2013, 11:37:51 PM by beekeeper »