# PC case Chieftec BM-25B-OP ATX Black

**URL:** https://aio.lv/en/product--chieftec-bm-25b-op--2108458
**Data updated:** 2025-12-29 10:37 (EET)
**Category:** Computer Cases
**Manufacturer:** CHIEFTEC
**Manufacturer code:** BM-25B-OP
**Warranty:** 2 Years
**Availability:** Available for order
**Price:** 70.99 €
**Prices and availability valid until:** 2026-07-11 23:59
**Price without VAT (21%):** 58.67 EUR
**Can be purchased by legal entities:** Yes (invoice)
**Buy:** https://aio.lv/en/product--chieftec-bm-25b-op--2108458

## Delivery options

| Delivery method | Delivery time | Cost |
|---|---|---|
| Office pickup (2b. Kengaraga str., Riga, Latvia, LV-1063) | 29.06.2026 | free |
| Pickup points | 02.07.2026 | 1.99 EUR |
| Courier delivery to door | 02.07.2026 | 7.06 EUR |

## Summary description

The Chieftec BM-25B-OP is a versatile PC case designed for ATX, Mini-ATX, and Mini-ITX motherboards. It features a sleek black design and supports various fan sizes for optimal cooling, including front fans of 90 and 120 mm, and rear fans of 80, 90, and 120 mm. The case accommodates multiple HDD sizes (2.5, 3.5, 5.25 inches) and has dimensions of 198 mm width, 465 mm depth, and 425 mm height, making it a practical choice for any build.

## Long description

The Chieftec BM-25B-OP ATX Black is a mid-tower PC case compatible with ATX, Mini-ATX and Mini-ITX motherboards. Constructed from 0.7 mm SECC steel and finished in black, the chassis continues the Classic Series lineage with a refreshed front panel and internal improvements. The design supports multiple drive sizes and a variety of fan configurations to suit standard system builds.
Advantages
The BM-25B-OP offers a sturdy SECC-steel construction, tool-less drive installation kits and a compact, practical footprint (198 mm W x 465 mm D x 425 mm H). Front and rear fan support for several sizes allows flexible cooling setups, and multiple external and internal bays accommodate 5.25", 3.5" and 2.5" drives. Front I/O includes USB 3.2 Gen 1 Type-A and USB 2.0 ports for common connectivity needs.
Suitable for
Home and office desktop builds using ATX, Mini-ATX or Mini-ITX motherboards
Systems requiring multiple 3.5" hard drives and at least one 2.5" SSD
Builds that need straightforward tool-less drive installation and standard front I/O
Key specifications
Supported motherboard form factors: ATX, Mini-ATX, Mini-ITX
Material: 0.7 mm SECC steel
External bays: 3 × 5.25"
Internal bays: 4 × 3.5", 1 × 2.5"
Front I/O: 2 × USB 3.2 Gen 1 (Type-A), 2 × USB 2.0
Fan support (examples): Front — 90 mm or 120 mm; Rear — 80 mm, 90 mm or 120 mm
Dimensions (W × D × H): 198 × 465 × 425 mm
Weight: 8.2 kg
Colour: Black
How to use
Install a compatible motherboard (ATX, Mini-ATX or Mini-ITX) on the standoffs, fit the PSU and route cables through the available openings. Use the tool-less drive kits to secure 3.5" and 5.25" drives, and mount the 2.5" drive in the dedicated bay. Choose and install front and rear fans according to your cooling needs and connect them to the motherboard fan headers. Connect front-panel USB ports and power/reset switches to the motherboard headers following the board manual.
Usage recommendations
For balanced cooling and quiet operation, install a 120 mm front fan combined with a 120 mm or 90 mm rear exhaust. Use the tool-less bays to reduce assembly time and ensure cables are routed away from airflow paths to maintain optimal cooling performance.

## 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 PC case Chieftec BM-25B-OP cost, and is it available for purchase?

The price is 70.99 € (valid at the time of publication and already includes all taxes). The item is available for order — 574 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 29.06.2026 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 PC case Chieftec BM-25B-OP 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 PC case Chieftec BM-25B-OP?

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/2108458/64919666_large.webp