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Antec 300 Three Hundred Gaming Midi Tower Case - Black

Stock may vary from item pictured. Retail pictures do not guarantee retail products.

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Free Delivery

This item is currently discontinued and at present, we have no replacement on order.
Quickcode: 31087  
Stock code: CSE-MID-AN-300
Cust. Rating:   Read reviews.
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The Essentially Cool and Quiet Case

Impressively spacious and unbeatably reliable, the Antec Three Hundred is an unbeatable enclosure. Despite its eminently portable frame, the Three Hundred has enough room for an NVIDIA 8800 series graphics card, as well as six hard drives and a standardATX motherboard. A cable management compartment keeps your system organized and the airflow unobstructed. A 120mm rear fan and 140mm top fan ensure that the case runs cool even when playing the most demanding games, while the sleek black finish gives it an extra stylish edge.

No Power Supply included

To optimize performance of your Three Hundred, your choice of power supply is crucial. Antec strongly recommends choosing from our NeoPower or TruePower series.


9 Drive Bays

  • External 3 x 5.25"
  • Internal 6 x 3.5" for HDD

Cooling System

  • 1 rear 120 x 25 mm TriCool™ Fan with 3-speed switch control
  • 1 top special 140 x 25 mm TriCool™ Fan with 3-speed switch control
  • 2 front (optional) 120 mm fans to cool the hard drives
  • 1 side (Optional) 120 x 25 mm Fan to cool graphic cards
  • Washable air filters reduces dust build up in your system, which helps keep your system cooler
  • Perforated front bezel for maximum air intake

7 expansion slots

Top mounted I/O ports for easy access

  • 2 x USB 2.0
  • HDA & AC’97 Audio In and Out

Unit dimensions

  • 18" (H) x 18.3" (D) x 8.1" (W)
  • 45.8 (H) x 46.5 (D) x 20.5 cm (W)


  • Net: 15.9lbs / 7.2kg
  • Gross: 18.7lbs / 8.5kg

Warranty Information:

Manufacturer antec
Warranty Type Manufacturer via Aria
Manufacturer Website
Manufacturer Email [email protected]
Warranty Period (yrs)1

Comments, Questions & Reviews:

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Question  mATX? by Benji

will this fit a micro-ATX motherboard?
The dimensions are 6.8 inches x 6.7 inches, Thanks

Answer by robinm on Saturday, November 8, 2008
of course!

Question  Question by Mike

Hi, im thinking of buying this case to go with my new system.

AMD Phenom Quad 9950 2.6GHz (Retail AM2+)
Asus M3N78-EMH HDMI GeForce 8200 Socket AM2+ Motherboard
OCZ 600W StealthXStream PSU

Will the PSU cables will be long enough to reach the motherboard considering its mounted at the bottom in this case?


Answer by robinm on Saturday, October 25, 2008
it does not have a PSU!

Question  psu for this case by brendan

can you tel me what psu will be best for this case.i ask this as i got this case last week from here and my psu cables are a little short it was a struggle getting them to fit.

Answer by robinm on Monday, October 20, 2008
Any of the branded PSU's will be fine - a modular one is suually best for these cases

Question  When will these be in stock? by Dave

Just wondering if and when these will be back in stock.


Answer by jonathanw on Wednesday, June 25, 2008
Any day now! Keep a watch on the site!
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