Intel Details Its Bitcoin-Mining ‘Bonanza Mine’ Chips and 3,600-Watt Miner

Bonanza Mine

(Image credit: Intel)

At ISSCC 2022, Intel shared the deep-dive details of its new Bitcoin-mining Bonanza Mine ASICs and outlined how it melds 300 of these tiny power-efficient chips into a powerful 3,600W miner that challenges the best on the market from Bitmain and MicroBT with up to 40 THash/s of performance.

We first discovered Intel’s Bonanza Mine ASICs in a listing for a presentation at the ISSCC 2022 conference, and the information below comes from the presentations at the event. This material covers the first generation of Intel’s mining chips, known as BMZ1, but the company has already moved on to its second-gen ‘Bonanza Mine’ ASIC, known as BMZ2, that it is now making available to customers.

After news of the company’s efforts came to light, Intel finally officially acknowledged its blockchain/Bitcoin silicon program, divulging that it already has several large customers for the second-gen chips. That includes BLOCK (helmed by CEO Jack Dorsey of Twitter fame), Argo Blockchain, and GRIID Infrastructure.

Intel hasn’t shared details of the second-gen chips and systems yet, but we do know they are derivatives of the BMZ1 ASICs shown below.

Bonanza Mine

(Image credit: Intel)

Here we can see the BMZ1 chip in its rather small 7 x 7.5mm exposed-die FCLGA package (132 balls). As you’ll see below, 300 of these chips power the system.

Each chip die measures 4.14 x 3.42mm, for a total of 14.16mm^2 of silicon, so these are comparatively small slivers of silicon. The smaller die size improves yield and maximizes wafer area usage (up to 4,000 die per wafer), thus helping maximize production capacity (though it does require more wafer dicing/packaging capacity). Intel says these are 7nm ASICs, but doesn’t specify if that is its own ‘Intel 7,’ the original 7nm before it renamed the process node to ‘Intel 4,’ or TSMC’s 7nm process.

Each Bonanza Mine ASIC has 258 mining engines, and each engine computes parallel SHA256 double hashes. These engines comprise 90% of the die area and operate at what Intel characterizes as an ‘ultra-low’ voltage of 355mV.

Zooming out to the 300 chips in the system, there’s a total of 4,248mm^2 of silicon that delivers up to 40TH/s at 3600W of power consumption. Each ASIC operates at 1.35 to 1.6 GHz at 75C, consuming an average of 7.5W apiece while hitting up to 137 Ghash/s. That works out to 55 J/THash/s at 355mV.

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Bonanza Mine

(Image credit: Intel )
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Intel Bonanza Mine ASIC

(Image credit: Intel)

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