Once More, I Floored The Accelerator

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This information all existed in the discord but I wanted to share it with everyone.

So weve developed an FPGA accelerator over the past few months in M.2 (same

as nVME drives) form factor designed to operate both standalone and in

conjunction with GPUs.

The first version to be released has 4x high speed PCIe lanes to communicate

between the system/GPUs as well as 512MB or 1GB of onboard DDR3 along with a

100k+ LE or 200k+ LE FPGA of high speed grade. Weve named it the Acorn, and

the three models are the CLE-101, CLE-215, and CLE-215+

General expectation is it will provide performance roughly scaled with

price/performance of the VCU1525, but it has a unique role and is not applicable

to all of the same algorithms. Its performance in this role is dominated by its

interconnect bandwidth and not its processing power.

It is capable of providing up to 30MH of lift to a mining system with GPUs on a

hand full of algorithms or operate independently at higher-than-GPU level

hashrates for other non-memory intensive algorithms (Keccak, etc). I will be

releasing it alongside our mining software and bitstreams to support hybrid GPU

acceleration. This project was not developed commercially, it was developed out of

a product for my day job for internal use in our own mining systems to give an

edge to traditional PCs and gaming systems turned miners.

The accelerator works by streaming high bandwidth hash state between GPUs and

the FPGA over PCIe., allowing each piece of hardware to handle the portion of the

algorithm it is best at. In general this means memory bandwidth or area heavy

portions of the algorithm may be handled by the GPU, and hash algorithms

designed for hardware implementations are handled by the FPGA. This approach

works for any algorithm whose internal state is 256 bit (60Mh gains) or 512 bit

(x16r, Lyra2Rev2, etc.) or smaller. The accelerator supports rapidly reconfiguring

its algorithms from on-board DDR to enable handling of per-block or period

(TimeTravel10) re-sequencing. It was designed originally to provide performance

gains (especially for older GPUs with poor cores) and power savings for ETH by

way of offloading the opening and closing Keccak calculations, as well as hashselection

to improve locality of reference for early ETH rounds.

Given the anticipated path of ETH itself regarding POS and other fork possibilities

please consider all those things if ETH is your target. It may be the most popular

coin for GPUs, that does not mean it is the best use of FPGA or hybrid tech.

Ive decided to make this hardware available to community at near cost, given all

the FPGA interest lately, alongside my belief that broadly available general

purpose acceleration hardware at its true market cost (not low volume industry

specific dev boards) is the best defense against complete ASIC centralization. You

will see this philosophy reflected in my activity around the VCU1525 board as well.

Anticipated pre-order prices of $199 for the CLE-101 512MB variant and $329 on

the high end highest speed grade CLE-215+ 1GB DRAM version. On-board power

consumption is nominally 15W. It will include a heatsink adequate for this

dissipation level with reasonable airflow. It is important to note that to fit the

FPGA this adapter is slightly outside of the 2280 M.2 specification, weighing in at

2380. The vast majority of M.2 slots should not have an issue with this.

I am also pursuing making available well priced options for individual PCIe x4 to

M.2 M-key host boards (these are broadly available for $10-15), as well as Quad-

M.2 PCIe switched and Bifurcated x16 host boards for those who do not have the

available M.2 M-Key slots or require up to 240MH of acceleration.

I wont post exact per algorithm stats or performance until I can do final testing of

the actual boards to be shipped with the release hardware/heatsink/thermal

management pieces in place, at which point Ill accept pre-orders. This device

requires quite a bit of testing to cover the list of common GPUs, PCIe

configurations, and supported algorithms. I have no desire to sell anyone anything

not useful to them, or to push a board at all, let alone one based on 3D renders,

prototype parts pictures, or choppy YouTube videos, so I believe this full set of

data along with final product pictures and overview must be published before I will

take any preorders. I am sorry if that tests your patience.

Prototypes exist and Ive already secured most of the hardware for a first batch so

lead time will only be PCB + assembly.

At the time of shipping I will be releasing our internal miner software in closed

source form for Windows and Linux that supports GPU only as well as Hybrid

acceleration. Youre also welcome to develop your own bitstreams for the

accelerator, and will have all the specifications necessary to do so.

I will also be publishing the interface for the bitstreams so that open source

miners that wish to can use the FPGA directly.

We are handling all CE, FCC, RoHS, and other certifications as well as ITAR and

export compliance, so we will be able to ship to all non-US embargod countries.

Taxes and import duties will fall on the purchaser. We will be offering at least a 90

day warranty.

All feedback is welcome. This is not my source of income, nor that of the rest of

my team, and we dont want anyones money unless they are happy with what

were offering. Im also happy to continue conversations I am already having with

coin devs and miner developers on how or if FPGAs fit into their plans for their

coin and/or ASIC Resistance strategies. This community is about choice, and I will

respect the choices of those teams.

So all I would like from all of you beyond the feedback, is for anyone interested to

hit our pre-order registration survey at http://www.squirrelsresearch.com to help

us ensure were covering your needs and wants and have all the appropriate

hardware secured. Based on that info very detailed performance information and

full device photos (spoiler – it looks like an SSD with a heatsink on it!) will be

published at the time preorders open, expected in mid-June.

– David

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trillobeat

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Re: Acorn M.2 FPGA based GPU Accelerator

June 01, 2018, 02:15:44 AM

+Merit #2

Good news!

I want to ask again , is the use of the M.2 accelerator helping only a single GPU

on the motherboard or all GPUs will benefit?

The MBs with two M.2 slots can use two accelerator units ? ( in the case a single

GPU per accelerator)

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GPUHoarder

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Re: Acorn M.2 FPGA based GPU Accelerator

June 01, 2018, 02:16:51 AM

+Merit #3

Quote from: trillobeat on June 01, 2018, 02:15:44 AM

Good news!

I want to ask again , is the use of the M.2 accelerator helping only a single GPU on the

motherboard or all GPUs will benefit?

The MBs with two M.2 slots can use two accelerator units ?

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