# Computer case Chieftec CM-01B-U3-OP Midi Tower Black

**URL:** https://aio.lv/en/product--chieftec-cm-01b-u3-op--297929
**Data updated:** 2025-12-29 15:31 (EET)
**Category:** Computer Cases
**Manufacturer:** CHIEFTEC
**Manufacturer code:** CM-01B-U3-OP
**EAN:** 4710713230064
**Warranty:** 2 Years
**Availability:** Available for order
**Price:** 358.49 €
**Prices and availability valid until:** 2026-07-14 23:59
**Price without VAT (21%):** 296.27 EUR
**Can be purchased by legal entities:** Yes (invoice)
**Buy:** https://aio.lv/en/product--chieftec-cm-01b-u3-op--297929

## Delivery options

| Delivery method | Delivery time | Cost |
|---|---|---|
| Office pickup (2b. Kengaraga str., Riga, Latvia, LV-1063) | 02.07.2026 | free |
| Pickup points | 07.07.2026 | 1.99 EUR |
| Courier delivery to door | 07.07.2026 | 6.15 EUR |

## Summary description

The Chieftec CM-01B-U3-OP is a Midi Tower computer case designed for PC builds. It features a sleek black design, top-mounted power supply, and supports various fan sizes including 120 mm for front and side, and 92 mm for the rear. It accommodates 3.5" HDDs and has dimensions of 190 mm width, 456 mm depth, and 420 mm height, making it a versatile choice for any setup.

## Long description

The Chieftec CM-01B-U3-OP is a Midi Tower computer case in black, designed for PC builders who want a practical, space-efficient chassis. It features a top-mounted power supply layout, support for Micro ATX and ATX motherboards, four 3.5" drive bays and three 5.25" bays. The case supports front and side 120 mm fans and a rear 92 mm fan, and includes two USB 3.2 Gen 1 (Type-A) ports on the front panel.
Advantages
The CM-01B-U3-OP offers a balanced combination of functionality and cost-efficiency with a sturdy SECC steel construction and a compact Midi Tower form factor. Multiple front panel options with USB and HD Audio connectors provide flexibility for different setups, while the top-mounted PSU and support for common fan sizes simplify installation and cooling configuration.
Suitable for
Home and office PC builds using Micro ATX or ATX motherboards
Systems requiring multiple 3.5" HDDs (up to 4 bays)
Budget-conscious users seeking a reliable, easy-to-build case
Key specifications
Brand: CHIEFTEC
Model: CM-01B-U3-OP
Form factor: Midi Tower
Material: SECC steel
Supported motherboards: Micro ATX, ATX
3.5" bays: 4
5.25" bays: 3
Front I/O: 2 × USB 3.2 Gen 1 (Type-A), HD Audio (depending on front panel)
Fan support: front/side 120 mm, rear 92 mm
Power supply: top-mounted (not included)
Dimensions (W×D×H): 190 × 456 × 420 mm
Weight: 6.63 kg
Colour: Black
How to use
Install the motherboard (Micro ATX or ATX) onto the standoffs and secure it with screws. Mount the power supply in the top compartment and connect power cables to components. Install 3.5" HDDs in the dedicated bays and secure optical drives or other 5.25" devices in the front bays. Fit fans in supported positions (front/side 120 mm, rear 92 mm) to ensure adequate airflow. Connect front panel USB and HD Audio to the motherboard headers as required.
Usage recommendations
For balanced cooling, install at least one front 120 mm intake fan and a rear 92 mm exhaust fan. Use cable routing behind the motherboard tray where possible to improve airflow and simplify assembly. Verify front panel connector compatibility with your motherboard before installation.

## Specifications

### Design

| Feature | Value |
|---|---|
| Type | PC |
| Form factor | Midi Tower |
| Supported motherboard form factors | Micro ATX, ATX |
| Number of 3.5" bays | 4 |
| Number of 5.25" bays | 3 |
| Side window | No |
| Material | SECC |
| Product colour | Black |
| Built-in speaker(s) | No |
| Suitable for | Home/Office |
| Number of internal 3.5" bays | 3 |
| Maximum CPU cooler height | 155 mm |
| Maximum graphics card length | 280 mm |
| Number of expansion slots | 7 |
| LED indicators | Y |

### Power supply

| Feature | Value |
|---|---|
| Power supply included | No |
| Power supply location | Top |

### Ports & interfaces

| Feature | Value |
|---|---|
| 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 |
| Side fans diameters supported | 120 |
| Rear fans diameters supported | 92 |
| Number of side fans supported (max) | 2 |
| Number of rear fans supported (max) | 1 |

### Storage

| Feature | Value |
|---|---|
| Supported HDD sizes | 3.5 |

### Weight & dimensions

| Feature | Value |
|---|---|
| Material thickness | 0.6 mm |
| Weight | 6.63 kg |
| Height | 420 mm |
| Width | 190 mm |
| Depth | 456 mm |

## FAQ

### How much does the Computer case Chieftec CM-01B-U3-OP cost, and is it available for purchase?

The price is 358.49 € (valid at the time of publication and already includes all taxes). The item is available for order — 2 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 02.07.2026 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 Computer case Chieftec CM-01B-U3-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, form factor, number of 3.5" bays, number of 5.25" bays, side window, power supply included, 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 Computer case Chieftec CM-01B-U3-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/297929/64876046_large.webp