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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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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  Question by Alex

Is this case suitable for the Gigabyte GA-X58A-UD3R Intel X58 (Socket 1366) DDR3 PCI-Express Motherboard???

Answer by stevenl on Tuesday, April 27, 2010

Question  MotherBoard by Danny

Sorry for another question, what would be the best motherboard for this, my budget is about £100-£150

Answer by vip on Saturday, December 12, 2009
No worries - But before you choose which motherboard you want to fit into your budget you need to decide if youre going down the INTEL, or AMD path... Then decide if you are ever going to need NVIDIA SLI, and also if you want DDR3 or DDR2.

Question  Power Suply by Danny

Looking to buy this case after XMas, just looking at what power supply to get, would both of these fit #35768 and #35821 if they both do, which one would be better and why?

Answer by vip on Saturday, December 12, 2009
Both would be fine... Go for the 800w if you are planning a high end VGA card and/or lots of hard drives etc.

Possible??? by The Bridge

Is this case suitable for the Asus P7P55D LE, Intel P55 Chipset Motherboard???


Response by stevenl
Yes, it should be fine with that Asus motherboard.

Question  *cough* by Teej

Would this case fit:
Asus-V Evo 785G with XFX HD5770; WD CaviarBlack 500GB; Phenom x4 955 BE and a Corsair VX 550W PSU?

It's just this case has been recommended to me, but obviously I don't want anything not fitting!! :)


Answer by stevenl on Friday, November 13, 2009
Yes, this case can take all of those components.
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