{"data":{"slug":"graphcore-bow","etype":"chip","name":"Graphcore Bow IPU","cat":"AI Accelerator","subtitle":"The wafer-on-wafer pioneer whose company became SoftBank's AI chip arm.","summary":"Graphcore's Bow IPU was the first production chip to use wafer-on-wafer 3D stacking (with TSMC), putting a power-delivery die under the compute die. The IPU's 1,472 cores and on-chip SRAM anticipated later designs, but the company missed the LLM wave commercially and was acquired by SoftBank in 2024 — its team now builds AI silicon inside the SoftBank/Arm orbit.","attrs":[{"g":"Overview","l":"Designer","v":"Graphcore"},{"g":"Overview","l":"Status","v":"Historical — company acquired by SoftBank (2024)"},{"b":"Vendor spec","g":"Manufacturing","l":"Process","v":"TSMC N7 with wafer-on-wafer stacking"},{"b":"Vendor spec","g":"Memory","l":"On-chip memory","v":"900 MB SRAM"},{"b":"Vendor spec","g":"Compute","l":"FP16","u":"TFLOPS","v":"350"}],"kf":{"node":"TSMC N7 (WoW)","year":2022,"class":"AI Accelerator","memory":"900 MB SRAM","designer":"Graphcore"},"aliases":["IPU","Bow","Graphcore"],"ticker":null,"exchange":null,"hq":null,"founded":null,"website":null,"status":"Historical","region":null,"asof":"2026-01-15","sources":[{"url":"https://www.graphcore.ai/","label":"Graphcore"}]},"meta":{"found":true,"count":1,"served_from":"site cache (no live upstream calls)","as_of":"2026-10-14T02:37:11+00:00","disclaimer":"Research and information only — not investment advice. Structured records carry basis labels (vendor spec / reported / estimate); market quotes are delayed/indicative.","attribution":"Records compiled from vendor documentation, official filings and reputable public reporting; market quotes via financial data providers. See /data-sources."}}