The race to power artificial intelligence creates opportunities for both hardware giants and niche companies.

Choosing between Aehr Test Systems (AEHR +3.25%) and Super Micro Computer (SMCI -3.12%) depends on your specific risk tolerance.

Aehr provides the testing equipment necessary to ensure semiconductor quality, while Super Micro builds the high-performance server racks that house those chips.

Both are central to the global computing shift, but they operate at very different scales.

We look at their recent performance and financial health to see which might be the better buy today.

The case for Aehr Test Systems Aehr Test Systems designs test and burn-in solutions for semiconductor devices used in electric vehicles, artificial intelligence, and telecommunications.

Its systems ensure reliability by testing chips in wafer or singulated die form before final assembly.

Five customers accounted for 70% of net sales in its 2026 fiscal year (FY), ended May 29, according to its latest annual report, and customer concentration like this adds a layer of risk to the business.

In FY 2026, revenue reached $50.0 million, representing a revenue decline of 15.2% compared to the prior year.

The company recorded a net loss of $7.1 million during this fiscal period, following a previous period of much higher profitability.

Its net margin for the year was -14.3%, which measures the percentage of total sales that remains as profit.

As of its May 2026 balance sheet, the current ratio is 10.3x, while the debt-to-equity ratio is zero.

A current ratio over 1.0 suggests the company has more than enough short-term assets to cover its immediate bills.

Free cash flow was negative $5.4 million, indicating the company is utilizing its cash reserves to maintain operations and development without relying on outside lenders.

The case for Super Micro Computer Super Micro Computer serves a diverse set of market verticals including enterprise data centers, cloud computing, and edge computing.

It is an increasingly vital player among semiconductor stocks because its rack-scale IT solutions facilitate the deployment of advanced artificial intelligence chips.

Four customers each accounted for 10% or more of net sales in fiscal 2025 according to its latest annual report, and customer concentration like this adds a layer of risk to the business.

In FY 2026, ended June 30, revenue reached $39.1 billion, representing significant revenue....