Western Digital vs Monolithic Power Systems
Side-by-side comparison of AI visibility scores, market position, and capabilities
Western Digital (WDC) reported ~$13.0B revenue in FY2024. Leading maker of hard disk drives and NAND flash storage products for cloud data centers, PCs, and consumer devices. HQ: San Jose, CA.
About
Western Digital Corporation is one of the world's largest data storage companies, manufacturing hard disk drives (HDDs) and NAND flash memory (under the WD and SanDisk brands) used in cloud data centers, personal computers, mobile devices, and enterprise storage systems. Founded in Santa Ana, California in 1970, Western Digital has survived multiple technology transitions and industry consolidations to become one of only two remaining large HDD manufacturers (alongside Seagate) and a major participant in the NAND flash market.
San Jose power management semiconductors (NASDAQ: MPWR) Q3 2025 revenue $737.2M (+18.9% YoY); Enterprise Data $191.5M (+33% QoQ) powering NVIDIA/Google/AMD AI GPU clusters, competing with Texas Instruments and Analog Devices.
About
Monolithic Power Systems, Inc. (MPS) is a San Jose, California-based analog and mixed-signal semiconductor company — publicly traded on NASDAQ (NASDAQ: MPWR) as an S&P 500 Information Technology component — designing high-performance power management integrated circuits for computing, cloud infrastructure, storage, automotive, industrial, and consumer applications through approximately 3,800 employees worldwide. In Q3 2025, Monolithic Power Systems reported revenue of $737.2 million (+10.9% sequentially, +18.9% year-over-year), with the Enterprise Data segment (AI server power management) reaching $191.5 million (+33% from Q2 2025) driven by strong demand for power management solutions in next-generation AI platforms from NVIDIA, Google, and AMD. CEO Michael Hsing founded MPS in 1997 and has led the company's growth from a consumer LED driver manufacturer to an AI infrastructure power management leader — with MPS power ICs now embedded in NVIDIA H100, H200, and GB200 GPU clusters as the voltage regulators that convert rack power supply voltage to the precise low-voltage, high-current supply that GPU cores require during AI training inference. MPS's proprietary Intelli-Phase multiphase power architecture delivers 99%+ efficiency for high-density AI compute power delivery — a competitive differentiation that directly affects data center PUE (power usage effectiveness) at scale.
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