Product reference
be quiet! Pure Base 803
A spacious, modular next-gen mid/full-tower case supporting E-ATX motherboards and up to three 420 mm radiators with flexible I/O placement and back-connect motherboard compatibility. Standard variant of the Pure Base 803 series.
AI score breakdown
scored as defaultIts biggest strength is a category-leading cooling and expansion ceiling β up to three 420 mm radiators, eleven 140 mm fan mounts, back-connect motherboard support, RTX 5090 clearance, and seven HDD bays make it one of the most capable airflow/workstation chassis in its class. The biggest weakness is that as an unreleased Q1 2027 product with no independent testing, real-world acoustics, panel fit, and the unusual top-mounted PSU layout are unproven, and Value is omitted because MSRP was not announced. Value is omitted due to unknown MSRP.
The overall score is the weighted average of these criteria — not a separate judgement. AI-generated scores are not hands-on test results. Percentages show each criterion's weight for this product type.
Scoring details
AI model: claude-opus-5
Generated: 2026-08-21
Specifications
| form factor support | E-ATX, ATX, Micro-ATX, Mini-ITX |
|---|---|
| radiator support | up to three 420 mm |
| back connect support | True |
| hdd bays | 7 |
| variant | standard |