US: 1-800-809-MINE (6463) | International: +1-913-815-8801

Now Shipping:
The Monarch
Butterfly Labs 28nm Technology Bitcoin Mining Card

Monarch

One of the quietest and most power-efficient
Bitcoin miner yet

Versatile and quiet.

PCI liquid cooled card mounted on a sled for easy external hosting, or remove from the sled to mount internally in a compatible PCI slot (requires appropriate power supply)



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We are pioneers of the industry - having manufactured the first commercial Bitcoin mining hardware.

Butterfly Labs has shipped more ASIC products than all competitors combined

BFL Truck

The Monarch 28 nm Bitcoin mining card is our 4th generation bitcoin processor - our 2nd generation ASIC chip.

BFL Facility

Our facility in Kansas has the largest production capacity of all Bitcoin hardware manufacturers.

Our engineering and management team has deep experience in technology and the Bitcoin space.

Current orders are shipping

No new retail orders at this time.
Institutional buyers contact us if you want to place an order.