COOLER MASTER MasterBox Q300P Micro-ATX Full Tower PC Case

Product code: 245813

Product features

  • Includes case cooling
  • USB 3.0 x 2
  • Includes RGB lighting / window
  • 4 expansion bays

Product features

  • Includes case cooling
  • USB 3.0 x 2
  • Includes RGB lighting / window
  • 4 expansion bays
Product information
Top features:

- Make your build stand out with customisable RGB lighting

- Flexible system building with multiple position options (and a modular i/o and mention clean routing space)

- Show off what's inside with an edge to edge glass side panel

Make your build stand out

Elevate your rig with the Coolermaster MasterBox Q300P Micro ATX Full Tower PC Case.

With customisable RGB lighting on the pre-installed fans, your components will be illuminated to make them look even more impressive, and you can programme the lighting to match your other peripherals for a clean, professional look. There's an included RGB controller, so getting the everything to match will be quick and hassle free.

Flexible system building

When you're constantly upgrading your components, you need a PC case that offers maximum flexibility. The MasterBox Q300P has a modular I/O panel that can be moved to six different locations on the case, so you can use it in whatever position best fits your setup. It also has four removable handles, so you can be confident moving it around.

Behind the motherboard, there is also space for cable management, so the look of your PC won't be ruined by messy wires.

Show off what's inside

With an edge-to-edge grey tinted glass side panel, you can show off what's inside your PC without having to take it apart.

Technical specifications for COOLER MASTER MasterBox Q300P Micro-ATX Full Tower PC Case

Case format Full tower
Form factor - Micro-ATX
- Mini-ITX
Motherboard support - Micro-ATX
- Mini-ITX
Case material Steel
Window material Plastic
Case bays - 3.5" bay x 1
- 2.5" bay x 2
Expansion slots 4
External connections - USB 3.0 x 2
- 3.5 mm jack x 1
Fan mount locations - Front (x2) 120/140 mm
- Top (x2) 120 mm
- Rear (x1) 120 mm
- Botom (x1) 120 mm
Radiator mount locations - Front (x1) 120/140 mm
- Rear (x1) 120 mm
Power supply unit ATX PS2
Fans included - 120 mm front fan x 2
- 120 mm rear fan x 1
Window Yes
LED lighting Yes - RGB
Maximum component size - Maximum GPU length: 360 mm
- Maximum CPU cooler height: 157 mm
- Maximum PSU length: 160 mm
Colour Black
Box contents Coolermaster MasterBox Q300P Micro-ATX Full Tower PC Case
Dimensions 450 x 230 x 450 mm (H x W x D)
Weight 5.2 kg
Customer reviews

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Price Promise, delivery & returns

You won’t get it cheaper. Full Stop.

You won’t get it cheaper. Full Stop.

We'll price match any product against any other retailer, online or in store. We’ll also match discount codes.

How to request a price match

Delivering your online order

Get this delivered when it suits you

We’ll show you your current delivery options for this item in checkout. Subject to the time you order, and where you want delivery, these options will include:

  • FREE standard delivery in 4-7 working days
  • Next day delivery or any following day between 8am & 5pm (£5.00)
  • Delivery in a timeslot of your choice next day or any following day (£10.00)
Please note: if we’re out of stock of an item but getting more in, we indicate – on listings pages and the product page – how soon we can dispatch for delivery to you. In this case, please go ahead and order, and we’ll contact you later to confirm an exact delivery date.

Important update on our delivery service for small items

Our courier partners (DPD, Royal Mail and On the Dot) have all updated their delivery processes to take extra precautions due to Coronavirus (COVID-19). Please follow the below advice:

1. Customers can use the DPD app to nominate a ‘safe place’ for their delivery to be left if they do not want close contact.

For customers unable to use the DPD app, DPD is still able to offer a contact-free delivery, and will take a picture of the property and capture a proof of delivery name instead of capturing a customer signature.

2. Royal Mail is an unsigned service . Where Royal Mail needs to deliver a parcel, its teams will place the parcel at the customer’s door. Having knocked on the door, the delivery teams will step aside to a safe distance while the item is retrieved. If the delivery cannot take place, Royal Mail will take the parcel to the local depot for collection by the customer.  The parcel will be held for 18 days as per normal process.

3. For On the Dot, where a standard signature delivery is not possible, On the Dot will attempt to leave the parcel in a safe place and inform the customer of where the parcel has been placed.

To see the courier partner for your delivery, please check your dispatch confirmation email (which will also include your tracking reference).

Availability Checker

How and when can you get hold of your selections? Finding out should be quick and easy, so with just a few clicks our Availability Checker shows you:

  • Delivery dates, time-slots and prices
  • Local stores with stock you can collect from now
  • Local stores you can get items sent to for you to collect later
To use our Availability Checker, simply:

  1. Enter a town or postcode in the box on the product page for an item you’ve selected
  2. Click on the magnifying glass
  3. Review the delivery and collection options local to you – just click on any one to add it to your basket

Stock updates

Find something you want but it’s not in stock? On the item’s product page, simply click on ‘Email me when back in stock’, and let us have your email address. We’ll let you know as soon as it’s available again.

Returns and refunds

Whether an item you’ve bought is faulty or damaged, or you’ve changed your mind, it’s easy to get a refund.

Items you haven’t opened
Within 21 days of receiving an item you paid for online, on the phone, or in store you can return it for a full refund – provided your purchase is still in its original and unopened packaging. This promise is in addition to your statutory rights.

Items you’ve opened
Within 14 days of receiving an item you paid for online or on the phone, you can return it, even if you’ve opened it. To receive a refund, you must:

  • Let us know you plan to return the item within 14 days of delivery/collection
  • Physically return it within a further 14 days.
The item must be returned in ‘as new condition’ – not used or installed, and in its original packaging. More on returns and refunds.

Order online and collect in store

Click & Collect ­­– Selected stores are now open for collection ONLY, allowing you to safely order online and collect from store.

If you’re coming by car you can use our Drive Thru parking bays.

  • Once you’ve had confirmation your order is ready to collect, drive to the store.
  • When you’ve arrived, click on the link in your confirmation email to let our team know.
  • One of our colleagues will put your order in your car boot.

If you’re on foot use our safe Walk Up service.

  • Once you’ve had confirmation your order is ready to collect, walk to store and head to the collection point.
  • When you’ve arrived, click on the link in your confirmation email to let our team know.
  • You’ll get a text when our colleague is bringing out your order.
  • Please remember to keep 2 metres away from our colleagues and other customers.

If your store already has stock of your item, you may be able to collect on the same day. If your store doesn’t have stock, we can get some in, but it may take a little longer. Don’t forget to wait for your ready to collect email and check store opening hours before heading out.

We strongly recommend that you check whether the item will fit in your vehicle before placing your order.

Creation - your plan Flexible credit you control

To spread the cost, pay by Your Plan, our uniquely flexible credit option. Available on all orders £99 and over, this lets you:

  • Spread the cost with monthly payments, 24.9% APR Representative (variable)
  • Choose the payment term that suits you
  • No deposit to pay and choose to pay it off early at no extra cost
  • Plus once you've opened an account, you can use it to spend again in the future on anything £99 and over
Learn more

How to apply
If you’re buying this item online, you can apply for credit at checkout. Or if you’re reserving online, or shopping in store, apply here.

DSG Retail Limited acts as a credit broker and not a lender. Credit is provided by Creation Consumer Finance Ltd.
Both DSG Retail Ltd and Creation Consumer Finance Ltd are authorised and regulated by the Financial Conduct Authority.

COOLER MASTER MasterBox Q300P Micro-ATX Full Tower PC Case