Esperanto’s ET-SoC-1 was a data-center inference accelerator built around 1,093 RISC-V cores—not a general-purpose replacement for GPUs and not primarily a chip for training AI models. The company’s 2021-era design targeted recommendation workloads, where irregular memory access can matter as much as raw arithmetic throughput.
What was Esperanto’s thousand-core chip?
The ET-SoC-1 was an accelerator system-on-chip from Esperanto Technologies. In a circa-2021 report by Embedded/EE Times, the design was described as containing 1,093 RISC-V cores: 1,088 small ET-Minion cores, four larger ET-Maxion cores and one service processor. Founder and executive chairman Dave Ditzel said, “We are the first to put a thousand RISC-V cores on a single chip.” That is his company’s claim, not an independently audited historical ranking.
The high core count was a means to combine many relatively small general-purpose processors with vector and tensor operations. Esperanto’s design rationale was that recommendation inference could involve irregular memory accesses that conventional accelerator architectures may not serve efficiently. This describes the workloads the company emphasized, not every AI inference task.
Was ET-SoC-1 for training or inference?
Its principal reported target was inference—running a trained model to produce results—especially recommendation models in data centers. Ditzel told Embedded/EE Times, “Their real problem is inference,” referring to the customers he described. That statement should not be read as a claim about all cloud providers or all AI workloads.
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According to the report, customer requirements included INT8, FP16 and FP32 support, and latency was a priority. Esperanto’s approach paired general-purpose RISC-V cores and vector/tensor capabilities with substantial memory resources to address the needs it identified. It was not presented as a universal substitute for GPUs in training or other AI applications.
How did the chip fit into a data-center system?
The circa-2021 report discussed a six-chip Glacier Point v2 accelerator card, not just an isolated chip. It attributed to the company a figure of about 800 TOPS at 1 GHz for that six-chip configuration and a total card power budget below 120 W. These are reported design and company claims, not independent benchmark results.
Rank #2
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| Configuration or figure | What the source reported | How to interpret it |
|---|---|---|
| Six-chip Glacier Point v2 card | About 800 TOPS at 1 GHz; below 120 W total | Esperanto’s reported configuration claim in Embedded/EE Times, circa 2021; not an independent measured comparison. |
| Chip power and frequency profiles | A reported 20 W-per-chip “sweet spot”; profiles spanning 10–60 W and 300 MHz–2 GHz | Different operating points were described for different uses; 20 W is not a universal chip power figure. |
| Memory in the reported system | Just over 100 MB of on-chip memory and around 100 GB of on-card memory for weights and activations | Figures from the historical system description; they should not be substituted for specifications of a later, separate card configuration. |
| Later single-chip PCIe card | One ET-SoC-1, PCIe Gen 4, and 32 GB LPDDR4x DRAM | Specifications on Esperanto’s product page; its publication date is not stated. |
The later ET-SoC-1 product page describes a low-profile, single-chip PCIe Gen 4 card with 32 GB LPDDR4x DRAM, as well as eight- and 16-card server configurations. The same page lists more than 160 million bytes of on-chip SRAM. These product-page details describe a different configuration from the six-chip Glacier Point v2 figures in the earlier report.
How should its performance claims be judged?
A TOPS figure alone does not tell you how an accelerator will perform on a real workload. Meaningful comparisons require the same model or workload, numeric precision, memory capacity and bandwidth, power measurement, host and card setup, and software support. It also matters whether a number is theoretical, based on emulation, or measured on production hardware.
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Embedded/EE Times reported a competitive performance statement attributed to Ditzel that was based on hardware emulation. Esperanto’s circa-2022 article for RISC-V International relayed a claim that a 120 W six-chip card delivered “59 times the performance and 123 times the energy efficiency of one 250-W Xeon.” Neither statement establishes a generally comparable, independently verified head-to-head result. The Xeon comparison is especially dependent on the test workload, precision, system boundaries and measurement method.
Independent reader supportYour contribution helps us test, update, and keep practical guides available for everyone.What happened to the product?
Esperanto’s official press archive says the company announced cloud evaluation access in April 2023 and had shipped evaluation servers. Those are historical statements; they do not establish that the evaluation program remains active.
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- Onboard CH343 and CH334 USB HUB chips, supports USB and UART development at the same time via a USB-C port
- Comes with online examples and tutorials for ESP-IDF development environment
The company’s current home page says Esperanto Technologies has ceased operations and that its intellectual property was acquired by Nekko.ai. The page also retains copy describing a server as available for purchase or remote cloud access. Because those statements conflict, they do not establish current stock, sales fulfillment, support, pricing or an active cloud service. Anyone seeking access should confirm arrangements directly with the current rights holder or a verified fulfillment channel rather than assume the old product listing is still actionable.
Quick Recap
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- Ample PSRAM Storage – The development board offers 8MB PSRAM, providing substantial extra memory for handling more complex tasks, large data buffers, and advanced processing.
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