# PC case CHIEFTEC GS-03B-OP Midi Tower, black — supports Mini-ITX/Micro-ATX/ATX/EATX, 3×140mm front fans + 1 rear fan, 2×3.5" bays, side window

**URL:** https://aio.lv/en/product--chieftec-gs-03b-op--11357951
**Data updated:** 2026-01-13 11:28 (EET)
**Category:** Computer Cases
**Manufacturer:** CHIEFTEC
**Manufacturer code:** GS-03B-OP
**EAN:** 0753263078865
**Warranty:** 2 Years
**Availability:** Available for order
**Price:** 56.49 €
**Prices and availability valid until:** 2026-07-16 23:59
**Price without VAT (21%):** 46.69 EUR
**Can be purchased by legal entities:** Yes (invoice)
**Buy:** https://aio.lv/en/product--chieftec-gs-03b-op--11357951

## Delivery options

| Delivery method | Delivery time | Cost |
|---|---|---|
| Office pickup (2b. Kengaraga str., Riga, Latvia, LV-1063) | Thursday | free |
| Pickup points | 25.06.2026 | 1.99 EUR |
| Courier delivery to door | 25.06.2026 | 7.10 EUR |

## Summary description

The CHIEFTEC GS-03B-OP is a black Midi Tower PC case designed for Mini-ITX, Micro-ATX, ATX and EATX motherboards. It comes with three pre-installed 140 mm front fans and one rear fan for improved airflow, supports 2.5" and 3.5" drives with two 3.5" bays, and features a side window. Dimensions: 238×440×450 mm; weight about 8–9.3 kg.

## Long description

The Chieftec GS-03B-OP is a black Midi Tower PC case designed to accommodate Mini-ITX, Micro ATX, ATX and EATX motherboards. It includes a side window, dust filters and preinstalled cooling fans to support internal airflow and mounting of 2.5" and 3.5" drives. The case dimensions provide space for typical gaming and productivity builds while keeping a compact mid-tower footprint.
Advantages
The case comes with multiple preinstalled fans to improve airflow, a side window for component visibility, and anti-dust filtering to reduce maintenance. It supports several motherboard form factors and both 2.5" and 3.5" drive sizes, offering flexibility for storage and system configuration.
Suitable for
Home or office desktop builds
Mid-range gaming PCs
Productivity and multimedia workstations
Systems requiring multiple HDDs or SSDs (2.5" and 3.5")
Key specifications
Form factor: Midi Tower
Supported motherboard sizes: Mini-ITX, Micro ATX, ATX, EATX
Preinstalled fans: front and rear configuration (includes three 140 mm front fans and one rear fan)
Side window: yes
Dust filter: yes
Drive support: 2.5" and 3.5" HDD/SSD bays
Exterior colour: black
Dimensions (approx.): 238 mm (W) x 440 mm (D) x 450 mm (H)
Weight: 8.06 kg
How to use
Install a compatible motherboard (Mini-ITX, Micro ATX, ATX or EATX) following the standoffs and I/O alignment, mount storage drives into the dedicated 2.5" or 3.5" bays, and connect the preinstalled fans to the motherboard fan headers or a fan controller. Install the power supply in the designated compartment and route cables through the case cutouts for optimal airflow and neat cable management. Verify front-panel connectors are connected to the motherboard header before powering on.
Usage recommendations
For reliable cooling performance, use the case's preinstalled front 140 mm fans in combination with the rear fan and keep dust filters clean. When installing high-profile CPU coolers or long graphics cards, check component clearance against the case dimensions. Use 2.5" SSDs for faster system drives and 3.5" HDDs for larger mass storage.

## Specifications

### Design

| Feature | Value |
|---|---|
| Type | PC |
| Form factor | Midi Tower |
| Supported motherboard form factors | Mini-ITX, Micro ATX, EATX, ATX |
| Number of 3.5" bays | 2 |
| Side window | Yes |
| Product colour | Black |
| Illumination | Yes |
| Anti-dust filter | Yes |
| Illumination colour | Multi |
| Suitable for | Gaming |
| Number of internal 3.5" bays | 2 |
| Maximum CPU cooler height | 178 mm |
| Maximum graphics card length | 425 mm |
| Number of expansion slots | 7 |
| Maximum PSU length | 200 mm |
| Illumination location | Back, Bottom, Case fans, Front, Top |
| On/off button | Yes |
| Tempered glass panel(s) | Yes |
| RGB control button | Yes |

### Power supply

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

### Ports & interfaces

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

### Cooling

| Feature | Value |
|---|---|
| Front fans installed | 3x 140 mm |
| Number of front fans supported (max) | 3 |
| Front fans diameters supported | 140, 120 |
| Rear fans diameters supported | 140, 120 |
| Top fans diameters supported | 240, 360, 280, 140, 120 |
| Number of rear fans supported (max) | 1 |
| Number of top fans supported (max) | 3 |
| Rear fans installed | 1x 140 mm |
| Liquid cooling capability | Yes |
| Rear radiator sizes supported | 140, 120 |
| Front radiator sizes supported | 360, 280, 240 |
| Top radiator sizes supported | 360 |
| Fan speed control | Yes |

### Storage

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

### Weight & dimensions

| Feature | Value |
|---|---|
| Weight | 8.06 kg |
| Height | 450 mm |
| Width | 238 mm |
| Depth | 440 mm |

### Packaging data

| Feature | Value |
|---|---|
| Package weight | 9280 g |
| LED controller | Yes |

### Packaging content

| Feature | Value |
|---|---|
| Manual | Yes |

## FAQ

### How much does the CHIEFTEC GS-03B-OP Midi Tower PC case cost, and is it available for purchase?

The price is 56.49 € (valid at the time of publication and already includes all taxes). The item is available for order — 365 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 Thursday 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: Cash payment, Bank transfer, Bank cards on-line, Apple Pay, Google Pay. All transactions are 100% secure and encrypted.

### 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, weight, supported motherboard form factors, 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.

## Image

https://aio.lv/img/cache/product/11357951/65837412_large.webp