Obelisk GRN1 IMMERSION (840+ GPS)


The GRN1 Immersion is a high-performance immersion ASIC miner for Grin’s Cuckatoo31+ hashing algorithm. Each GRN1 Immersion contains 48 ASIC chips, with a minimum hashrate of 840GP/S for a power consumption of 4400W.

2 in stock


SKU: MNOB005 Category: Tag: Brand:

Obelisk GRN1 IMMERSION (840+ GPS)

The GRN1 miner comes in three form factors: a traditional form factor, compact form factor, and an immersion form factor. Obelisk GRN1 IMMERSION (840+ GPS)


ModelGRN1 Immersion
ReleaseOctober 2019
Noise level75db
Rack format1U
Temperature5 – 45 °C
Humidity5 – 95 %



Grin is a private and lightweight implementation of the mimblewimble blockchain. Launched on January 15, 2019, Grin strives for scalability, openness, fair distribution, and privacy by default.

Grin’s Proof-of-Work consists of two sets of algorithms, one ASIC-resistant and one ASIC-friendly. Over time, the ASIC-friendly algorithms phase-in, reaching 100% of the block reward by January 2021. Grin’s first ASIC-friendly algorithm is Cuckatoo31+, which should maintain dominance until approximately April 2020.

Each high-performance miner comes with a coupon for use on a future GRN2 order and a donation to Grin development.

Obelisk GRN1 IMMERSION (840+ GPS) Algorithms

This miner is designed for Grin’s Cuckatoo31+ hashing algorithm. It will NOT Work on Cuckaroo29+ or Cuckatoo32+




We’ve developed a service at Obelisk to fix these issues. We will work with coin developers to design a custom, ASIC-friendly proof-of-work algorithm, while simultaneously developing the first batch of ASICs. The algorithm is not disclosed to the public until the ASICs are completed, meaning there is no chance that another group is able to be first to market.

This gives the coin developers control over the launch of their coin. ASICs can be distributed throughout the community, and we can ensure that no party controls more than a certain percentage of the hashrate, nor has any capacity to commit abuse. From Genesis, the coin is protected by powerful community-owned ASICs.

Obelisk GRN1 IMMERSION (840+ GPS)

This does mean that, at launch, the coin is centralized around a single ASIC manufacturer. We believe that this is the best way to guarantee a clean and fair start for a coin, however, it is not the right way for a coin to exist perpetually. An Obelisk Launchpad release will include open source chip design schematics that can be leveraged by competing companies to bring their own ASICs to market, as well as other guidance related to the manufacturing process and various techniques to help competitors get off the ground. We will be doing this because our goal is not a monopoly. Our goal is a healthy and secure cryptocurrency community.



Noise level

Power Consumption

Power Supply


Delivery Batch

In Stock, JAN 20th