SilverStone ML04B Micro ATX HTPC Case

SilverStone ML04B Micro ATX HTPC Case — image 1
SilverStone ML04B Micro ATX HTPC Case — image 2
SilverStone ML04B Micro ATX HTPC Case — image 3
SilverStone ML04B Micro ATX HTPC Case — image 4
SilverStone ML04B Micro ATX HTPC Case — image 5
SilverStone ML04B Micro ATX HTPC Case — image 6
SilverStone ML04B Micro ATX HTPC Case — image 7
71%
29%
86%
Build Quality
68%
Thermal Performance
61%
Acoustic Performance
63%
Internal Space & Layout
59%
Component Compatibility
66%
Ease of Assembly
82%
Aesthetics & Exterior Design
57%
Front I/O Usability
79%
Security Features
72%
Value for Money
64%
Cooling Flexibility
83%
Long-Term Durability
77%
Drive Bay Versatility
More

Overview

The SilverStone ML04B Micro ATX HTPC Case is one of those rare products that has quietly outlasted most of its competition by simply doing its job well. Introduced in 2013, this slim mATX case fills a genuinely scarce niche: a low-profile desktop enclosure that accommodates a full-size ATX power supply without forcing you into a tower. At just 105mm tall and 16.2 liters, it sits flat on a media shelf without looking out of place beside an AV receiver. The aluminum front door gives it a cleaner finish than most steel-only alternatives, and the lockable front panel adds a practical security touch rarely found at this form factor.

Features & Benefits

One of the ML04B's most practical advantages is standard ATX PSU support — something that sounds basic but eliminates a real headache. SFX power supplies cost more, offer fewer options, and can complicate future upgrades. Here, a regular PSU mounts from the side without drama. The drive cage uses multi-purpose mounts that handle both 2.5-inch and 3.5-inch drives natively, which keeps the interior tidier during a build. Four 80mm fan slots give reasonable airflow flexibility for a case this thin, and the adjustable front LED brightness is a thoughtful touch if this HTPC enclosure lives in a bedroom. One non-negotiable limit: CPU cooler clearance stops at 70mm, so sort your component list before purchasing.

Best For

This slim mATX case makes the most sense for a specific kind of builder. If you are assembling a living room media PC and want something that looks natural on an AV shelf rather than under a desk, the proportions and clean black exterior work well. It also suits small offices or shared spaces where a lockable chassis is a genuine practical requirement — not a feature you commonly find at this size. Builders repurposing older mATX hardware will appreciate that standard components fit without expensive substitutions. That said, if you need a full-height GPU or a substantial tower cooler, look elsewhere. Correct expectations going in make a real difference.

User Feedback

Across nearly 600 ratings, the ML04B holds a 4.3-star average — strong for a case that has been on the market for over a decade. Buyers consistently highlight the solid construction and finish, and many point to how straightforward ATX power supply installation is compared to competing slim enclosures. The recurring frustration is cable management. The interior is tight, and without deliberate planning — routing cables before seating the motherboard, using low-profile connectors where possible — it can become a genuine challenge. Some users also find that 80mm fans at full speed are noticeable in a quiet room; replacing them with quality aftermarket options largely solves it. Satisfaction runs high among those who understood the low-profile component requirements upfront.

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Pros

  • Accepts standard ATX power supplies, saving money and avoiding the limited SFX market.
  • The aluminum front door gives the ML04B a noticeably more refined look than steel-only rivals.
  • Lockable front panel and power button are practical security features uncommon at this form factor.
  • Multi-purpose drive mounts handle both 2.5-inch and 3.5-inch drives without additional adapters.
  • Four 80mm fan slots offer real airflow flexibility for such a thin chassis.
  • Adjustable front LED brightness is a small but thoughtful detail for bedroom or living room use.
  • 16.2-liter volume is compact without feeling impossibly cramped for a mATX build.
  • Over a decade on the market with a 4.3-star average signals consistent, reliable quality.
  • Front USB 3.0 ports and audio jack cover everyday connectivity without dongles or adapters.

Cons

  • The 70mm CPU cooler height limit is a hard constraint that cuts off most mainstream cooling options.
  • Internal cable routing is genuinely tight — poor planning early in the build creates real headaches later.
  • 80mm fans at higher RPMs can be audible in quiet rooms, requiring aftermarket replacements for silence-focused builds.
  • Only low-profile expansion cards are supported, which significantly limits discrete GPU choices.
  • The side-mounted PSU placement can complicate airflow planning depending on the power supply fan orientation.
  • At 11 pounds unloaded, this HTPC enclosure is heavier than some users expect for its footprint.
  • The design has not been refreshed since 2013, so front I/O options feel dated compared to newer cases with USB-C.
  • Limited internal space makes future component upgrades or hardware swaps more involved than in a standard mid-tower.

Ratings

The scores below for the SilverStone ML04B Micro ATX HTPC Case were produced by our AI system after analyzing thousands of verified purchase reviews from global buyers, with spam, bot submissions, and incentivized feedback actively filtered out. Each category reflects the honest balance of what real builders praised and what genuinely frustrated them — nothing is glossed over.

Build Quality
86%
Buyers consistently describe the chassis as solid and well-finished for its price tier, with the aluminum front door standing out as a clear step above the all-plastic fronts common on competing slim cases. The steel body shows minimal flex during handling, and the overall assembly feels deliberate rather than cost-cut.
A subset of users noted that some internal panels have slightly sharp edges that can catch skin during builds, and the front door hinge, while functional, lacks the premium damped feel you might expect given the aluminum construction.
Thermal Performance
68%
32%
For media center and light office workloads, airflow through the four 80mm fan positions is adequate, and builders who populate all slots with quality fans report stable temperatures even under moderate sustained loads. The side-mounted PSU placement also keeps heat from pooling in the main chamber.
The slim profile fundamentally limits airflow volume, and thermally demanding CPUs or workloads push the case near its ceiling quickly. The 70mm cooler restriction forces reliance on low-profile coolers that are inherently less capable, making this HTPC enclosure a poor match for anything above a mid-range processor under sustained load.
Acoustic Performance
61%
39%
At low fan speeds during idle or light use, the ML04B is reasonably quiet and unobtrusive in a living room setting. Builders who proactively replace stock or budget 80mm fans with premium low-noise alternatives report a noticeably quieter system that holds up well during media playback.
The reliance on 80mm fans is an inherent acoustic compromise — smaller fans must spin faster to move the same air volume as larger alternatives, and at mid-to-high RPMs the noise becomes clearly audible in a quiet room. This is a structural limitation of the form factor, not a fixable defect.
Internal Space & Layout
63%
37%
The internal layout is logically organized for its size, with the drive cage system handling multiple drive formats without adapters and the side-mounted PSU leaving the motherboard area reasonably accessible. Experienced builders find the space workable once they understand its geometry.
Cable management is the most consistently cited frustration among real buyers. The clearances between components are tight enough that untidy cable routing can obstruct airflow or interfere with drive installation, and the lack of a dedicated cable management channel means patience and pre-planning are not optional.
Component Compatibility
59%
41%
Standard ATX power supply support is a genuine differentiator here — it removes cost and availability barriers that comparable slim cases impose. Drive bay versatility is also strong, with multi-format mounts covering most combinations of SSDs and mechanical drives without extra hardware.
The 70mm CPU cooler height limit and low-profile-only GPU restriction meaningfully narrow the component pool, and buyers who discover these constraints after purchasing consistently leave negative feedback. Anyone planning a performance-oriented build will find the compatibility envelope too restrictive to work around comfortably.
Ease of Assembly
66%
34%
The overall case structure is straightforward to access, with the side panel coming off cleanly and the motherboard tray area being reasonably reachable for a slim desktop. Builders familiar with mATX systems generally report no unexpected mechanical surprises.
First-time builders or those used to the spacious interiors of mid-towers often find the ML04B challenging. Routing power and data cables without disturbing already-seated components requires multiple attempts, and the tight interior does not tolerate improvisation during the build process.
Aesthetics & Exterior Design
82%
18%
The combination of the aluminum front panel, clean black finish, and slim proportions gives this slim mATX case a look that blends naturally with AV equipment and does not scream generic PC tower. The lockable front door keeps bays and ports hidden when not in use, adding to the tidy appearance.
The design is showing its age relative to newer cases with mesh fronts, RGB accents, or tempered glass panels. For buyers who prioritize a modern aesthetic, the ML04B looks conservative, and the front I/O panel lacks the USB-C ports now expected on current-generation builds.
Front I/O Usability
57%
43%
Two USB 3.0 ports and a headphone jack cover the basic daily needs for a media center PC — connecting a USB drive, a controller, or headphones without reaching around to the back panel is genuinely convenient in a living room context.
The absence of USB-C is the most glaring modernization gap on this case. Given that the product has not been revised since 2013, buyers expecting current front panel standards will be disappointed, and the single audio port offers no microphone input separately.
Security Features
79%
21%
The lockable front door and power button are features that stand out in a category where most manufacturers skip physical security entirely. For shared office environments or deployments where preventing unauthorized access or accidental power cycling matters, this is a practical and appreciated inclusion.
The lock mechanism uses a simple key cylinder that security-conscious buyers may consider insufficient for sensitive deployments. It deters casual access effectively but would not stand up to any determined attempt, so it functions more as a convenience deterrent than genuine protection.
Value for Money
72%
28%
In the narrow market of slim mATX cases that accept full-size ATX power supplies, the ML04B faces limited competition, which means buyers are not overpaying for features they do not need. Those who purchase it with clear use-case expectations almost universally feel the investment was justified.
For buyers who later discover the cooler or GPU limitations post-purchase, the value perception drops sharply. The price also feels less competitive when measured against newer Mini-ITX cases that offer comparable footprints with more modern feature sets, even if they require SFX power supplies.
Cooling Flexibility
64%
36%
Having four 80mm fan positions in a case this thin is genuinely more than many direct competitors offer, and thoughtful placement — typically one front intake and one rear exhaust at minimum — produces a reasonable positive-pressure airflow path that keeps dust accumulation manageable.
80mm is a constrained fan format with fewer high-performance options than the 120mm or 140mm market. Buyers cannot install larger, quieter fans as a straightforward upgrade, which puts a ceiling on how much the acoustic and thermal situation can be improved through aftermarket solutions alone.
Long-Term Durability
83%
The steel-and-aluminum construction has held up well for buyers who have been running systems in the ML04B for multiple years, with no significant reports of structural degradation, panel warping, or hinge failure over extended use. Its continued market presence since 2013 is itself a reasonable signal of build longevity.
The front door lock mechanism is the most frequently cited wear point over time, with occasional reports of the key cylinder becoming stiff after prolonged use. Replacement parts are not commonly stocked, which could become a frustration for buyers who rely on the security feature.
Drive Bay Versatility
77%
23%
The multi-purpose drive mounts are one of the more practical design choices in this HTPC enclosure — mixing SSDs and mechanical drives in the same build requires no separate trays or adapters, which keeps the build cost down and the interior cleaner.
Maximum total storage device count is modest relative to what a full-size desktop case would support, and buyers planning NAS-adjacent builds with four or more drives will hit capacity limits quickly. The 5.25-inch bay also has limited utility in an era where optical drives are increasingly optional.

Suitable for:

The SilverStone ML04B Micro ATX HTPC Case was built for a specific kind of builder, and those people will genuinely appreciate it. If your goal is a living room PC that sits flat on a media shelf beside an AV receiver without drawing attention, this enclosure delivers a clean, professional look that most compact cases simply cannot match. It is also a strong pick for anyone repurposing an existing mATX system into a tidier, more space-efficient form — especially because standard ATX power supplies fit without modification, keeping component costs predictable. Small offices or shared workspaces that need a lockable chassis will find the front door and power button security genuinely useful rather than gimmicky. Builders who have already done their homework on low-profile CPU coolers and compact GPUs, and are comfortable working within those constraints, will find the build process straightforward and the result rewarding.

Not suitable for:

The SilverStone ML04B Micro ATX HTPC Case is a poor fit for anyone planning a performance-focused or thermally demanding build. The 70mm CPU cooler height cap rules out virtually every mainstream tower cooler on the market, which means high-TDP processors will need careful pairing with capable low-profile alternatives — and even then, thermal headroom is tighter than in a full-size enclosure. Dedicated gaming builds are similarly constrained, since only low-profile GPUs fit, which significantly limits graphics performance options. Builders who prioritize easy cable management or plan to swap components frequently will find the interior frustratingly snug — it rewards patience and planning, not quick iteration. If you want room to grow, upgrade freely, or install a custom cooling loop, this slim mATX case is the wrong starting point regardless of its other strengths.

Specifications

  • Form Factor: Slim desktop enclosure designed for Micro ATX motherboards, intended to lie flat on a media shelf or desk.
  • Dimensions: The case measures 440mm wide, 105mm tall, and 350mm deep, giving it a low-profile footprint suited for AV setups.
  • Internal Volume: Total internal capacity is 16.2 liters, compact by desktop standards yet sufficient for a capable mATX system.
  • Body Material: The main chassis is constructed from steel, while the front door panel is aluminum for a cleaner, more finished appearance.
  • Motherboard Support: Compatible with Micro ATX motherboards only; larger ATX or smaller Mini-ITX boards are not officially supported.
  • PSU Compatibility: Accepts standard ATX (PS2) power supplies mounted on the side, with a maximum depth of 140mm.
  • CPU Cooler Limit: Maximum CPU cooler height is 70mm, requiring the use of low-profile coolers regardless of processor choice.
  • Expansion Cards: Supports up to four low-profile expansion cards; full-height GPUs or other full-size cards are not compatible.
  • Fan Slots: Four 80mm fan mounting positions are available, allowing flexible airflow configuration across the chassis.
  • Drive Bays: Storage options include one dedicated 2.5-inch bay, two combo 3.5-inch or 2.5-inch bays, and one multi-purpose bay accepting 5.25-inch, 3.5-inch, or two 2.5-inch drives.
  • Front I/O: The front panel provides two USB 3.0 ports and one audio-out jack for everyday peripheral and headphone connectivity.
  • Security: Both the front door and the power button are lockable, providing basic physical access control for shared or office environments.
  • LED Indicator: A front-panel LED activity indicator includes adjustable brightness settings, useful for reducing visual distraction in dark rooms.
  • Weight: The unloaded case weighs approximately 11 pounds (roughly 5kg), reflecting its steel and aluminum construction.
  • Color: Available in black, designated by SilverStone as the ML04B variant.

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FAQ

The hard limit is 70mm. That rules out virtually all standard tower coolers, so you will need a dedicated low-profile model. Popular choices include the Noctua NH-L9a and the Thermalright AXP90, both of which fit comfortably within that ceiling.

You can use a standard ATX power supply, which is one of the ML04B's genuine advantages over many competing slim cases. The PSU mounts on the side and can be up to 140mm deep, covering most mainstream units without issue.

No. Only low-profile expansion cards are supported, which significantly limits discrete GPU options. If gaming performance is a priority, this enclosure is not the right choice — you will want a case with full-height card support.

It depends largely on the fans you use. The included or standard 80mm fans can become audible at higher RPMs, which is noticeable in a quiet room. Swapping them for quality low-noise aftermarket 80mm fans — Noctua and be quiet! both make good options — makes a meaningful difference.

It takes more planning than a mid-tower. The interior is tight, and if you route cables without a clear plan, things get cluttered fast. The practical advice is to route and loosely secure all cables before seating the motherboard, and to use flat or right-angle connectors where possible. It is manageable, but not forgiving of improvisation.

No fans are included in the box. The case provides four 80mm mounting positions, but populating them is left to the builder. For most light-duty or media center builds, two well-placed 80mm fans — one intake, one exhaust — are sufficient.

When locked, the front door covers the optical or storage bay area and prevents access to the power button. It is not a high-security solution, but it is genuinely useful in small offices or shared spaces where you want to prevent accidental or unauthorized power cycling and basic tampering.

Yes, without adapters. The drive cage uses multi-purpose mounts that natively accommodate both form factors across its various bays, so mixing an SSD and a mechanical drive in the same build is straightforward.

For its specific niche, yes. Slim Micro ATX cases that accept standard ATX power supplies remain genuinely scarce, and the ML04B holds its ground in that gap. The front I/O lacks USB-C, which is its most dated aspect, but the core build quality and functional design have not aged poorly.

Only Micro ATX boards are officially supported. Mini-ITX boards will physically fit on the standoffs but are not an intended configuration, and larger standard ATX boards will not fit at all. If you are planning an ITX build, SilverStone makes dedicated ITX cases that are a better fit.

Where to Buy

Walmart
SilverStone ML04B Micro ATX HTPC Case
In stock $122.10
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Newegg.com
SilverStone ML04B Micro ATX HTPC Case
In stock $131.47
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eBay
SilverStone ML04B Micro ATX HTPC Case
In stock $155.13
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