# Computer case CHIEFTEC BM-25B-OP — ATX / Mini-ATX / Mini-ITX, SECC, black, 198×465×425 mm

**URL:** https://aio.lv/en/product--chieftec-bm-25b-op--2126877
**Data updated:** 2026-03-20 21:18 (EET)
**Category:** Computer Cases
**Manufacturer:** CHIEFTEC
**Manufacturer code:** BM-25B-OP
**EAN:** 753263076366
**Warranty:** 2 Years
**Availability:** Available for order
**Price:** 87.49 €
**Prices and availability valid until:** 2026-07-12 23:59
**Price without VAT (21%):** 72.31 EUR
**Can be purchased by legal entities:** Yes (invoice)
**Buy:** https://aio.lv/en/product--chieftec-bm-25b-op--2126877

## Delivery options

| Delivery method | Delivery time | Cost |
|---|---|---|
| Office pickup (2b. Kengaraga str., Riga, Latvia, LV-1063) | 30.06.2026 | free |
| Pickup points | 03.07.2026 | 1.99 EUR |
| Courier delivery to door | 03.07.2026 | 7.23 EUR |

## Summary description

CHIEFTEC BM-25B-OP is a mid-tower PC case made of SECC in black, supporting ATX, Mini-ATX and Mini-ITX motherboards and ATX power supplies. Dimensions are 198 × 465 × 425 mm. Drives: four 3.5", one 2.5" and three 5.25" bays. Front/rear fan support: 90/120 mm front, 80/90/120 mm rear. Includes 2× USB 2.0 and 2× USB 3.2 Gen 1 Type-A ports.

## Long description

CHIEFTEC BM-25B-OP is a mid-tower PC case constructed from 0.7 mm SECC steel in a black finish, designed to accommodate ATX, Mini-ATX and Mini-ITX motherboard form factors and standard ATX power supplies. With external dimensions of 198 × 465 × 425 mm and a weight of approximately 8.2 kg, the chassis combines a compact footprint with practical internal capacity. Drive support includes four 3.5" bays, one 2.5" bay and three 5.25" bays. The front panel provides easy access to 2× USB 2.0 and 2× USB 3.2 Gen 1 Type-A ports, while fan mounting positions support 90/120 mm fans at the front and 80/90/120 mm at the rear. The BM-25B-OP continues CHIEFTEC's CLASSIC Series approach by offering a refreshed front design together with toolless drive installation options and reliable SECC construction for everyday system builds.
Advantages
The chassis offers a sturdy SECC steel construction that ensures structural rigidity and long-term durability while keeping the overall weight manageable for a mid-tower. Multiple drive bays—including dedicated 3.5" and 2.5" locations plus three external 5.25" bays—provide flexible storage and optical drive options without the need for additional adapters. Front-panel connectivity includes two USB 3.2 Gen 1 Type-A ports for faster data transfer alongside two USB 2.0 ports for legacy peripherals. Fan mounting options at the front and rear accommodate different cooling setups and help maintain airflow in both basic and upgraded configurations.
Suitable for
 Home and office builds using ATX, Mini-ATX or Mini-ITX motherboards
 Systems requiring multiple internal 3.5" hard drives and a single 2.5" SSD
 Budget-friendly multimedia PCs with optical drive or front bay devices
 Compact mid-tower setups where a balance of drive capacity and small footprint is needed
Key specifications
 Form factor: mid-tower compatible with ATX, Mini-ATX, Mini-ITX
 Material: 0.7 mm SECC steel
 Exterior colour: black
 Dimensions (W × H × D): 198 × 465 × 425 mm
 Weight: 8.2 kg
 Drive bays: four 3.5" bays, one 2.5" bay, three 5.25" bays
 Front/rear fan support: front 90/120 mm; rear 80/90/120 mm
 Front I/O: 2× USB 3.2 Gen 1 Type-A, 2× USB 2.0
 Power supply compatibility: standard ATX PSUs
How to use
Install the motherboard onto the appropriate standoffs for ATX, Mini-ATX or Mini-ITX layouts, then mount a standard ATX power supply in the dedicated PSU area. Place 3.5" hard drives into the toolless 3.5" bays and secure the 2.5" SSD in its dedicated slot; optical drives or other 5.25" devices fit into the three external 5.25" bays. Connect front-panel USB and power/reset cables to the motherboard headers according to the motherboard manual. Use the provided mounting positions to install a front 90/120 mm fan and a rear 80/90/120 mm fan if additional active cooling is required. Route cables to minimize airflow obstruction and reattach side panels before powering on the system.
Usage recommendations
For typical desktop and multimedia applications, pair the BM-25B-OP with an air-cooled CPU cooler and one or two case fans to maintain adequate airflow. When populating multiple 3.5" drives, ensure there is sufficient clearance for drive heatsinking and arrange cables to avoid blocking the front intake. Use the USB 3.2 Gen 1 ports for external drives or high-speed peripherals and reserve USB 2.0 ports for keyboards, mice or other low-bandwidth devices.

## Specifications

### Design

| Feature | Value |
|---|---|
| Type | PC |
| Supported motherboard form factors | Mini-ITX, Mini-ATX, ATX |
| Number of 3.5" bays | 4 |
| Number of 2.5" bays | 1 |
| Number of 5.25" bays | 3 |
| Side window | No |
| Material | SECC |
| Product colour | Black |
| Number of internal 3.5" bays | 3 |
| Maximum CPU cooler height | 140 mm |
| Maximum graphics card length | 250 mm |
| Number of expansion slots | 7 |
| Number of external 5.25" bays | 3 |
| On/off button | Yes |

### Power supply

| Feature | Value |
|---|---|
| Supported power supply form factors | ATX |

### Ports & interfaces

| Feature | Value |
|---|---|
| USB 2.0 ports quantity | 2 |
| USB 3.2 Gen 1 (3.1 Gen 1) Type-A ports quantity | 2 |
| Audio input | Yes |
| Audio output | Yes |

### Cooling

| Feature | Value |
|---|---|
| Number of front fans supported (max) | 1 |
| Front fans diameters supported | 120, 90 |
| Rear fans diameters supported | 120, 90, 80 |
| Number of rear fans supported (max) | 1 |

### Storage

| Feature | Value |
|---|---|
| Supported HDD sizes | 2.5, 3.5, 5.25 |

### Weight & dimensions

| Feature | Value |
|---|---|
| Material thickness | 0.7 mm |
| Weight | 8.2 kg |
| Height | 425 mm |
| Width | 198 mm |
| Depth | 465 mm |

### Packaging data

| Feature | Value |
|---|---|
| Package weight | 9400 g |

### Other features

| Feature | Value |
|---|---|
| Screws included | Yes |

### Logistics data

| Feature | Value |
|---|---|
| Harmonized System (HS) code | 84733080 |

## FAQ

### How much does the CHIEFTEC BM-25B-OP PC case cost, and is it available for purchase?

The price is 87.49 € (valid at the time of publication and already includes all taxes). The item is available for order — 10 pcs. are in stock, and you can place your purchase right now with delivery across Latvia and Europe or choose pickup at the Riga collection point. We offer favorable purchase terms, including the option to split the payment into convenient monthly installments. Availability and price are updated in real time, so we recommend placing your order in advance.

### If I order this product today, when will I receive my order?

If you place your order today, delivery will be as fast and convenient as possible. You will be able to pick up your order on 30.06.2026 at the Riga pickup point or choose delivery across Latvia and Europe. We carefully inspect every purchase and pack it securely for safe transportation.

### What payment options are available?

AiO.lv offers several payment methods: Bank transfer, Bank cards on-line, Apple Pay, Google Pay, Installment. All transactions are 100% secure and encrypted.

### Can CHIEFTEC BM-25B-OP PC case be purchased with a lease?

Yes, the purchase is available both on credit and with an interest-free installment plan. Learn more about installments and credit options: https://aio.lv/en/payment#b3

### Can this product be purchased for a company (with VAT)?

Yes. AiO.lv works with legal entities in Latvia and across Europe. The product price already includes VAT. For certain product categories, as well as for companies from other EU countries with a valid VAT number, a 0% VAT rate may apply. We issue the invoice immediately after the order is placed, support electronic BIS invoices, and automatically generate all necessary accounting documents. You can complete the purchase for a company online — simply select the company profile and choose bank transfer as the payment method during checkout.

### What is the warranty period?

All CHIEFTEC products come with an official 2 Years warranty. It covers all manufacturing defects and malfunctions that may occur during use. The warranty is valid at all authorized CHIEFTEC service centers and through AiO.lv

### Can the product be returned after purchase?

Yes, you can return the product within 14 days of purchase if you bought it as a consumer (not a legal entity). Returns are possible without giving any reason — the main condition is that the product retains its original appearance and full set of accessories. We will make the process as simple and convenient as possible: just contact our customer support team, and we will help you arrange the return.

### Where should I contact for warranty service?

For warranty-related questions you can contact the AiO.lv (SIA VSPRO) customer support team. More information about warranty service: https://aio.lv/en/warranty

### How can I tell if this product suits my needs?

When making a choice, we recommend paying attention to the key features: type, number of 3.5" bays, number of 2.5" bays, number of 5.25" bays, side window, usb 2.0 ports quantity, usb 3.2 gen 1 (3.1 gen 1) type-a ports quantity, weight, supported motherboard form factors, material, product colour, compatibility with your devices or usage conditions, material quality, functionality, and warranty terms. These characteristics will help you determine how well the model meets your needs.

### Where can I download the instructions for CHIEFTEC BM-25B-OP PC case?

You can download the instructions in PDF format from the “Instructions” section on the product description page. The file contains complete information about installation, setup, and usage.

## Image

https://aio.lv/img/cache/product/2126877/64921483_large.webp