This article covers SilverStone Fortressシリーズ PCケース シルバー SST-FTZ01S.

Overview

The SilverStone Fortress SST-FTZ01S is a slim Mini-ITX case built with a unibody aluminum frame, offering a premium look and feel. It was designed to push the boundaries of slim form-factor cases, supporting high-end components including a full-size graphics card up to 330mm in length. This makes it an excellent choice for compact gaming rigs or HTPC setups that need real performance. Despite being introduced around 2015, the FTZ01S remains popular among Mini-ITX enthusiasts due to its sturdy construction, positive-pressure cooling design, and flexible orientation (horizontal or vertical). Its silver brushed-aluminum finish blends well with modern living spaces, and the included dust filters help maintain a clean interior over time.

Compatibility Guide

The SST-FTZ01S is strictly designed for Mini-ITX motherboards. It does not support Micro-ATX or ATX boards. The power supply must be an SFX or SFX-L unit; standard ATX PSUs will not fit. For graphics cards, the maximum length is 330mm, but users should check card thickness and connector clearance, as some wide cards may interfere with the side panel. Storage options include two 2.5-inch drives and one 3.5-inch drive. M.2 SSDs are supported via the motherboard. CPU cooler height is limited to roughly 83mm, so large air coolers are out; low-profile air coolers or liquid cooling (120mm radiator in front) are recommended. The case includes two pre-installed 120mm fans at the front and supports an optional 80mm fan at the rear.

Product Info

Released in early 2015, the SilverStone Fortress FTZ01S (SST-FTZ01S) sits in the mid-to-high-end segment of slim Mini-ITX cases. Its all-aluminum construction and attention-to-detail set it apart from plastic alternatives. The original MSRP was around 15,000 JPY, but current prices on marketplaces have fallen to about 3,280 JPY, offering great value for the build quality. Warranty is one year from the manufacturer. Weighing 4.6 kg, the case feels solid despite its compact dimensions. Cooling performance is adequate for mid-range builds, and the positive-pressure design helps reduce dust buildup. It also supports liquid cooling radiators up to 120mm, making it suitable for modest overclocking setups.

Best Use Cases

This case is ideal for gamers seeking a compact yet powerful Mini-ITX system. The GPU clearance allows for mid-to-high-end cards like an RTX 4070 or RX 7800 XT (provided they aren't overly thick). For HTPC enthusiasts, the horizontal orientation fits perfectly in an AV cabinet, and the low noise level enhances movie and music experiences. It also suits users who want a small footprint on their desk. Paired with a vertical stand (sold separately or included in some bundles), it takes minimal desktop space while housing a fully capable PC. However, due to the cooler and PSU constraints, it is best suited for experienced builders who can carefully select compatible components.

Things to Consider

Because the SST-FTZ01S is nearly a decade old, compatibility with the latest components can be tricky. Modern high-power graphics cards may be too thick or have fan positions that hit the side panel. Additionally, SFX PSUs with high wattage (750W+) are available but often more expensive than equivalent ATX units. CPU cooler height limitation (83mm) forces the use of low-profile coolers or liquid cooling, which may limit CPU choices to mid-range chips or require a water block for high-end processors. Airflow at heavy load can be restricted, so users should plan their component temperatures carefully. If you prioritize raw expandability and cooling over aesthetics and compactness, newer cases like the Cooler Master NR200P offer more flexibility. But for those who appreciate the classic aluminum look and slim design, the FTZ01S remains a compelling and affordable choice.