Antec 300 Three Hundred Two Tower Case - with USB 3.0

Product overview



Standard Due date unavailable

Let the Games Begin

The team that brought you the Three Hundred is back with an enclosure designed to handle today and tomorrow's high-performance systems. Introducing the Three Hundred Two, the next standard in affordable gaming cases. Our newest chassis is built for gamers from the inside-out, from its aggressive front bezel, to its advanced cooling system. With tool-less 5.25" & 3.5" drive bays, a large cable management compartment and two front panel USB 3.0 ports with an internal connector, the Three Hundred Two is the rightful heir to the Gaming Series legacy


  • 11 drive bays: 3 x 5,25" tool-less drive bays / 2 x 2,5" drive bays (dedicated) / 6 x 3,5" tool-less drive bays
  • Motherboards: Standard ATX, microATX, Mini-ITX
  • 8 expansion slots
  • Maximum graphics card size: 318 mm (12,5")
  • Maximum CPU cooler height: 170 mm (6,7")
  • Cooling System: 1 x 120 mm rear TwoCool™ fan / 1 x 140 mm top TwoCool™ fan / 2 x 120 mm front intake fans (optional) / 1 x 120 mm side intake fan (optional) / 1 x 120 mm side exhaust fan behind motherboard (optional)
  • Perforated front bezel for maximum air intake
  • Water cooling support: top water cooling grommets
  • Enlarged CPU cutout
  • Front I/O ports: 2 x USB 3.0 with internal motherboard connector / Audio In/Out
  • No power supply included
  • Unit Dimensions: 513 mm (H) x 229 mm (W) x 471 mm (D) / 20,2" (H) x 9,0" (W) x 18,5" (D)



Product Description
Antec Three Hundred Two - tower - ATX
Product Type
System cabinet
Form Factor
I/O Connectors
2 x USB 3.0 , 1 x audio line-out , 1 x microphone
Supported Motherboards
ATX, microATX, Mini-ITX
System Cabinet Features
Meshed front panel, CPU cut-out, cable management holes
Power Device
No power supply
Specification Compliance
ATX / PS/2
Dimensions (WxDxH)
22.9 cm x 47.1 cm x 51.3 cm
6.9 kg
Manufacturer Warranty
3 years warranty



Form Factor
Max Mainboard Size
Supported Motherboards
ATX, microATX, Mini-ITX
Specification Compliance
ATX / PS/2
Internal Bays Qty
Front Accessible Bays Qty
Cooling System
Rear: 120 mm fan x 1 / TwoCool , Top: 140 mm fan x 1 / TwoCool , Front: 140 mm fan mount x 2 / intake , Side: 120 mm fan mount x 1 / intake , Side: 120 mm fan mount x 1 / exhaust
System Cabinet Features
Meshed front panel, CPU cut-out, cable management holes

Expansion / Connectivity

Expansion Bays
3 (total) / 3 (free) x front accessible - 5.25" x 1/2H , 6 (total) / 6 (free) x internal - 3.5" x 1/3H , 2 (total) / 2 (free) x internal - 2.5"
Expansion Slots
8 x Expansion Slot
2 x USB 3.0 , 1 x audio line-out - mini-jack , 1 x microphone - mini-jack


Compliant Standards


Power Device
No power supply
Max Supported Qty

Dimensions & Weight

22.9 cm
47.1 cm
51.3 cm
6.9 kg

Manufacturer Warranty

Service & Support
Limited warranty - 3 years


C2G 4 port USB 3.0 SuperSpeed Hub
Quicklinx: 7CBW | In Stock
C2G 2m USB 3.0 A Male to Micro B Male Cable
Quicklinx: 7GNS | In Stock

Customer reviews

Write review The opinions expressed in this reviews section are those of our customers and not of BT Shop. Nothing contained herein amends BT Shop’s terms and conditions.
5* Fabulous mid-sized case
Reviewed by Neil Hunter on 13/01/2013
I honestly can't fault this case. It comes with a top 140mm fan and a rear mounted 120mm fan, both of which have high/low speed switches on the rear of the case. As well as that, you can mount two more on the front, one on the side for the graphics card and one on the other side to cool the rear of the CPU mount should you so desire!
The case is solid and the internal cabling supplied all fitted perfectly to my Asus P8Z77 mobo. On the front, there are two handy USB3 connectors. The internal 3.5 inch drive mounts are great. You just clips a couple of plastic slide-mounts onto the HD, which then slides as an assembly into the case. Both side panels are removable for aid cabling which is a doddle.
The PSU is mounted at the bottom but I recommend you have the case on a hard surface, and not carpet, as the feet sink into a carpet which then muffles the PSU air inlet a little. Overall, I am very pleased with this case.
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