Hey Miners 👷🏻‍♂️⛏ Here's our quick review about Acorn CLE-215+ by SQRL🐿!


Acorn CLE-215+ is a GPU mining accelerator made by SQRL🐿. Acorn increases the GPU hashing power with a little increase on power consumption. While GPU is not fully optimized to hash some algorithms, Acorn offloads and perform the tasks where GPUs fall behind, and it performs those tasks much faster.

Acorn CLE-215+ by SQRL🐿

How to Mine with Acorn

Currently, Acorn CLE-215+ only supports Zen Protocol standalone mining.

Install Acorn

Install Acorn to an M.2 slot in your motherboard or you can also use PCI to M.2 riser.

Install Driver

You can download the driver 👉here, download based on your operating system (Windows or Linux).

Windows: Double click MSI and follow prompts
Linux: Extract tgz → chmod +x sqrldma.run → sudo ./sqrldma.run

Start Mining

You can download the bitstream and miner 👉here.

Windows: Edit pool and wallet in bat file (start_215Plus_2core.bat for Acorn 215+) → Double click bat file to start mining

Linux: Edit pool and wallet in sh file (start_215Plus_2core.sh for Acorn 215+) → ./start_215Plus_2core.sh to start mining

Miner Control Keys

Keyboard Use For
+ or - increment or decrement core clock for all acorns
1 - 9 select a specific acorn for commands to apply to
a reselects all acorns
d disabled
e enables
q quits

Reference: http://www.squirrelsresearch.com/get-started-acorn/

FPGA Guide

Your Guide to FPGA Mining

Mining Performance

We ran ZP standalone miner on a single Acorn CLI-215+. We ran the Acorn with 195Mhz clock speed and room temperature around 25oC. The result we got:

Hashrate: 402.89MH/s
Power: ~20W
Temperature: ~68oC
Crashing: Yes (After ~18 hours)

AcornMiner: Hashrate=390MH/s. Temperature=68.17 C.
Pool side: 402.89MH/s (18 hours average)
Note: Many people in the Discord community also report crashing even with a lower frequency than us. So, please run it at a lower frequency first!


  • 🏃‍♂️ GPU Acceleration. Able to improve GPU's performance significantly, but not yet available.
  • 🌎 Ships Immediately Worldwide. You can buy in SQRL Store🛒.
  • 🔧 90 Days Warranty.


  • 🐌 Slow Bitstream/Miner Development. Miner for GPU is still not available after a few months.
  • 💸 Long ROI. Standalone mining (ZP) only generates about $0.02-0.03/day
  • 💥 Crashing Problems. Some people in Discord experienced crashing even non-functioning Acorn.

Company Background

Squirrels Research Labs (SQRL) is a sister company of Squirrels LLC under the Squirrels Inc. umbrella. SQRL focuses on hardware development and research projects that contribute to the overall success of the Squirrels brand.

SQRL is building the next generation of cryptocurrency mining hardware. Think mega hash rate, high performance, and low power. By using a different approach to mining using FPGA-based hardware, they’re able to make existing GPU-based mining rigs competitive against ASIC alternatives. In addition to accelerating existing GPU systems, SQRL is developing standalone FPGA-based hardware that, unlike ASIC hardware, is resistant to algorithm changes.

You can find some of them on discord under these usernames: GPUHoarder#5195, SQRL_Jess#9016, Lims#7654, Meatlegs#1952, sqrl_aaron#7471, and SQRL_Ryan Hardware Engineer#8059.

Official Website: http://squirrelsresearch.com/
Email: support@squirrelsresearch.com