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Crypto

Arbitrum, Optimism, Base rebut Vitalik criticism of Layer 2 scaling model

Major Ethereum Layer 2 developers including Optimism, Arbitrum and Base have responded after Ethereum co-founder Vitalik Buterin raised doubts about the Layer 2 scaling model, Cointelegraph reported on Tuesday. Buterin said Layer 2 can no longer be key to Ethereum scaling, citing reliance on multisig bridges and security concerns. Developers argued Layer 2 remains important even if the mainnet scales and highlighted throughput and feature upgrades.

AI & Enterprise

Positron raises $230 million to challenge Nvidia AI chips

AI chip startup Positron has completed a $230 million Series B funding round, TechCrunch reported on Tuesday. The company plans to use the funds to develop high-speed memory chips. Qatar's sovereign wealth fund QIA participated in the investment round. Positron is drawing attention as big tech companies move to reduce reliance on Nvidia. The company said its Atlas chip delivers performance similar to Nvidia's H100 GPU while cutting power use to one-third.

AI & Enterprise

AMD shares fall 9 percent after earnings as Q1 outlook disappoints

AMD posted fourth-quarter revenue of $10.27 billion, beating market expectations, but its shares fell 9 percent after its first-quarter guidance missed some analysts' estimates, CNBC reported on Feb. 4. AMD forecast first-quarter revenue of $9.8 billion, plus or minus $300 million. Susquehanna analyst Chris Rolland said market expectations were too high and that fourth-quarter results were less positive than expected due to the inclusion of China revenue.