- Form factor
- Mid-Tower
- Motherboard support
- ATX / mATX / ITX
- GPU clearance
- 380 mm
- Released
- 2026

Ultra Tower · ATX / mATX / ITX · GPU up to 420 mm
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FSP U691-BP Case Full Tower mITX, mATX, ATX (BTF) Black is an ultra tower PC cabinet that takes ATX / mATX / ITX motherboards and graphics cards up to 420 mm long. It came out in 2025.
Check the manufacturer's page before buying.
Unleash Performance with Stunning Clarity Elevate your setup with the U691 Three-Glass PC Case, where sleek design meets superior functionality. Featuring tempered glass panels on the top, front, and sides, this case offers a crystal-clear view of your build while ensuring enhanced durability. Perfect for gamers and PC enthusiasts who demand both aesthetics and efficiency. 120mm PWM ARGB FAN The rear is equipped with a 120mm PWM ARGB fan, controlled via a dedicated controller. 180mm-high CPU COOLER Supporting up to 180mm CPU Cooler. Seamless Compatibility, Unmatched Performance The U691 case supports ATX (BTF), M-ATX, and Mini-ITX motherboards, featuring built-in cable routing holes for effortless back-connect motherboard integration. With space for graphics cards up to 420mm and CPU coolers up to 180mm, it ensures a clean, organized build while delivering an immersive, unrestricted gaming experience. Superior Airflow & Spacious Capacity The U691 PC case is designed with mesh panels and dust filters on the bottom and side for enhanced airflow.
| FSP U691-BP Case Full Tower mITX, mATX, ATX (BTF) Black | FSP U660-B Case Full Tower mITX, mATX, ATX (BTF), E-ATX | FSP M540-BA Case Midi Tower mITX, mATX, ATX (BTF) Black | ASUS A32 PLUS TG ARGB BLACK | |
|---|---|---|---|---|
| Form factor | Ultra Tower | Full-Tower | Mid-Tower | Mid-Tower |
| Motherboard support | ATX / mATX / ITX | ATX / mATX / ITX | ATX / mATX / ITX | ATX / mATX / ITX |
| GPU clearance | 420 mm | 420 mm | 420 mm | 420 mm |
| Released | 2025 | 2026 | 2025 | 2026 |
Ultra Tower, ATX / mATX / ITX, GPU up to 420 mm.
Ultra Tower.
It was released in 2025/04 (FSP).
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