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Item#: N82E16811129180

Antec Three Hundred Two Black Steel ATX Mid Tower Computer Case with Upgraded 2 x USB 3.0

  • Steel ATX Mid Tower
  • 2 x USB 3.0 / Audio Front Ports
  • 3 External 5.25" Drive Bays
  • 6 Internal 3.5" Drive Bays

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  • Overview
  • Specifications
  • Warranty & Returns
  • Reviews

Antec Black Steel ATX Mid Tower Computer Case

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. The Three Hundred Two is the rightful heir to the Gaming Series legacy.




To ensure that heat won't be a problem, the Three Hundred Two offers a rear 120mm TwoCool™ fan and a top 140mm TwoCool™ fan with four optional fans. It also features a side 120mm fan mount to cool graphics cards and another 120mm fan mount behind the motherboard try to help dissipate heat buildup. For maximum flexibility, top water cooling grommets are included for a custom water loop option and an enlarged CPU cutout.


Less Maintenance and More Gaming

Comes with total of nine tool-less 5.25" & 3.5" drive bays with two dedicated SSD mounts, a large cable management compartment, and two front panel USB 3.0 ports with an internal connector makes installation a 1-2 step. The Three Hundred Two also takes advantage of the cable routing holes behind the motherboard tray, making cable management a breeze. It can support a maximum graphics card length of 12.5" (318mm) and a removable, washable PSU air filter and front intake filter to top it off.


Antec Antec Antec Antec


Model Three Hundred Two
UPC 0-761345-15320-1
Unit Dimensions (H x W x D) 20.2 x 9 x 18.5" (513 x 229 x 471mm)
Package Dimensions (H x W x D) 22.2 x 11.4 x 20.7" (565 x 290 x 525mm)
Maximum Video Card Size 12.5" (318mm) maximum video card size
Case Type Mid-Tower
Front Ports Two USB 3.0 with internal motherboard connector • Audio In/Out
Cooling SystemCase Type
  • One 120mm rear TwoCool™ fan
  • One 140mm top TwoCool™ fan
  • Two 120mm front intake fans (optional)
  • One 120mm side intake fan (optional)
  • One 120mm side exhaust fan behind motherboard (optional)
Drive Bays
  • Three 5.25" tool-less drive bays
  • Two 2.5" drive bays (dedicated)
  • Six 3.5" tool-less drive bays
Motherboard Support Standard ATX, microATX, Mini-ITX
CPU Cutout Enlarged CPU Cutout
Color(s) Black
  • Net Weight 15.3 lbs (6.9kg)
  • Gross Weight 18.7 lbs (8.5kg)
Expansion Slots 8 expansion slots

Learn more about the Antec Three Hundred Two

Warranty, Returns, And Additional Information
  • Warranty
  • Limited Warranty period (parts): 3 years
  • Limited Warranty period (labor): 3 years
  • Read full details

Customer Reviews of the Antec Three Hundred Two

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  • Lloyd B.
  • 10/3/2015 8:07:03 PM
  • Tech Level: Average
  • Ownership: 1 week to 1 month
  • Verified Owner

5 out of 5 eggsThis is now my favorite mid-size case - wish I'd used it for other builds

Pros: Well built and sturdy. Easy to work in. Really liked the way the front and side panels hinged in place rather than the tongue and groove style I've seen. Also impressed with the ability to remove the front panel completely (it was not tethered to the case with wiring).

Cons: No internal speaker for the motherboard. Not impressed with the position for the 2.5" drive directly behind the motherboard. There is lots of room in this case does the drive need to be in a place where you must remove the motherboard to get to the drive?

Other Thoughts: I'm using this case for a file server so I wanted a no-frills type setup that was well-built and reasonably priced. This case fit the bill. For this type of setup though the front audio jacks were not necessary. I would rather have had more USB options and even a reset button. I didn't put this in the Cons section because they are personal preferences for my intended use.

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  • David C.
  • 9/17/2015 10:29:39 AM
  • Tech Level: Somewhat High
  • Ownership: 1 day to 1 week
  • Verified Owner

5 out of 5 eggsAmazing

Pros: I have purchased several of the older models of this case and the improvements to it are really remarkable. For this price point, this case is freaking amazing. It has lots of room to work. Quick snap on rails to slide in 3.5" drives, quick release locks and buttons for optical drives, USB 3.0 front side... I mean are you kidding me? This case is nice!!

Cons: None really.

Other Thoughts: If you're not sure which case to buy just get this one. I really don't think you will be disappointed. You will be able to use this case for years to come.

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  • Alexander K.
  • 9/4/2015 4:14:41 PM
  • Tech Level: High
  • Ownership: 1 day to 1 week
  • Verified Owner

4 out of 5 eggsNice case, some issues to watch for

Pros: Easy modular design, great looks, solidly built, great onboard fans, very quiet.

Cons: The front panel is USB3 only so the internal expansion connector is 3.0 only and some motherboard that actually have 3.0 still don't seem to provide expansion slots. I bought this with ASUS M5 A97 mobo and apparently the front panel is not available.
This is not readily apparent so you/re stuck with waiting on a converter, in this case they at least provide one, which is this:
Looks really embarrasing when you're trying to complete a project on time.

Other Thoughts: Overall I am quite impressed for the price, nice quiet onboard fans, plenty of room, great modular design and awesome looks.
I am really irked at the cheapness of the manufacturer for not providing an easy way to install on mobos that you either want to put usb 2.0 on the front or don't have 3.0 available as expansion set.

1 out of 1 people found this review helpful. Did you? Yes No

  • Brett P.
  • 8/28/2015 1:23:11 PM
  • Tech Level: Somewhat High
  • Ownership: 1 month to 1 year
  • Verified Owner

4 out of 5 eggsGreat case

Pros: - Solid construction
- Big rubber feet
- Good air flow
- Two large fans (120 mm and 140 mm)
- Excellent cable routing
- Easy mounting of drives
- Lots of room internally

Cons: - The two USB connectors on the front panel are a tight fit, making it difficult to insert cables; but they do seem to be loosening up with use.

Other Thoughts: I bought this case for my very first DIY computer build. I was a little concerned when I started thinking about how to route all of the power and data connectors inside the box -- many of the comments left by buyers of other cases complained about this. However, this case makes it incredibly easy to route cables. In fact, it was actually fun. There is a separate compartment for passing the cables, so they don't clutter up the hardware compartment.

Internal drives don't require any screws or hardware to mount; the case includes snap-on rails that work really well. Also, Antec provides enough rails for ALL the drive bays, not just one or two. The drive bays are oriented so that they are perpendicular to the length of the case, making it really easy to get units in and out. Plus, the bays are designed so that drives can be installed facing left or right, giving you a lot of flexibility for dealing with the cables.

The included fans are quite large and create a lot of air flow. Both fans have a little switch on the back of the case for hi/low speed. I keep them both on low. Even on low they are far from silent, but seem pretty quiet for their size, and I'm easily disturbed by noise. There is a good 1/2" of clearance under the case, too, which helps with the air flow. When my quad-core CPU is running at full tilt, I have never seen the case temperature rise above 32 C, and the processor itself has never exceeded 40 C. If you really feel the need for more air flow. there are two more places where additional fans cen be installed. (There are also two rubber grommets on the top of the case, which I assume are for liquid cooling setups.)

Finally, I find this case to be visually appealing, with a simple, conservative design. There are no clear windows, flashing lights, or other gimmicks that might appeal to younger users.

All in all, this is a great case that I recommend highly for any level of build experience. Its price point is higher than many budget cases, but take my advice and spend the extra $20.

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  • Steven N.
  • 8/14/2015 1:23:12 PM
  • Tech Level: Average
  • Ownership: 1 day to 1 week
  • Verified Owner

5 out of 5 eggsSmooth as a baby's bottom

Pros: No sharp edges anywhere inside and out - awesome quality, included fans have 2 speeds (hi-low) and can be adjusted in the back-exterior, plenty of room for more fans and cable management is easy with the cut-outs

Cons: Case seems wider than the previous model

Other Thoughts: added a front intake fan and this thing is chillin, great airflow, kinda wish the hard drive rack was removable to allow better flow if only using a single SSD setup, had a micro-atx board in this case and it looked tiny so really made for atx boards imo.

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  • EVA W.
  • 8/14/2015 9:40:00 AM
  • Tech Level: Somewhat High
  • Ownership: more than 1 year

3 out of 5 eggsDrive Rails could be better

Pros: The airflow spacing between stacks of HDDs is as good as any side-mounted drive-case around. Excellent airflow

Cons: Despite the generous width of the case, the drive-rails only allow one drive-mounting direction so both sides of the case must be removed for any HDD maintenance. If the drive-rails included all 3 peg-holes, drives could have been mounted 'tail out' so all cables AND drive-removal could have been completed in one direction - with less (or no) need to remove a case from its surroundings.

Other Thoughts: I can give a lukewarm Recommend as a big, heavy case for 6-8 HDDs but it's going to require more after-install maintenance due to the drive-rails' lack of peg-holes. Accessing SATA pedestals is overly difficult because of uselessly oversized motherboard tray. (The old Coolermaster 431 has a much better design.)

0 out of 1 people found this review helpful. Did you? Yes No

  • Anonymous
  • 8/7/2015 8:47:39 AM
  • Tech Level: High
  • Ownership: 1 month to 1 year

4 out of 5 eggsReasonable successor to Three Hundred

Pros: Supports USB3.0 and 2.5" drives unlike early Three Hundred cases. Good airflow and Sonata style drive mounting is convenient. Tool-less drive mounting seems to work better than some other brands.

Cons: Call me old-fashioned, but I like screw mounted drives. If they're going to offer tool-less drive mounting, please allow screws too. I also prefer card mounting that's inside the case like in the previous model (Three Hundred). Side-ways drive mounting limits the size of acceptable video cards.

Other Thoughts: I've built up two of these now and overall I like this case, but I'd buy the older Antec Three Hundred given the chance to buy one for the same price. I've built up at least a half a dozen systems in the Antec Three Hundred and prefer it to more expensive cases.

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  • Richard D.
  • 8/6/2015 7:38:49 AM
  • Tech Level: Somewhat High
  • Ownership: 1 week to 1 month
  • Verified Owner

1 out of 5 eggsVery bad USB 3.0 ports

Pros: Enough big to have place to work in.
Very good airflow.

Cons: USB 3.0 do not works. One of the two ports do not work at all and the other one work only if i hold the connector at 90 degrees of the case faceplate, if i don't hold the connector the device vanish from Windows explorer. Also, it is hard to plug a device in these USB 3.0 ports, Antec did a very bad job with the USB3 ports of this unit.

Other Thoughts: Do you think i will ask for a new one, spend hours to remove components (i have a lot), and waiting a few weeks without computer and spend other hours to rebuild the system and after that a possibility to see that the USB 3.0 ports of the new unit are also bad. I have neck problems and all these hours will let me in a bad state for days. I did the build one time and it's enough for me. I prefer to buy something with USB ports that goes into a 5.25 inches bay. It's easier to rma it if it don't work.

0 out of 4 people found this review helpful. Did you? Yes No

  • Tristan M.
  • 7/31/2015 2:16:29 PM
  • Tech Level: High
  • Ownership: 1 day to 1 week
  • Verified Owner

5 out of 5 eggsA Solid Case

Pros: The case is HUGE and WIDE, mostly because it has a lot of space behind the motherboard mounting plate, to allow more room for cable management. It is built like a tank and the quality is top notch. I didn't see it mentioned anywhere on Newegg's product page, but the case actually has two fan control switches (high and low) on the back for each of the two case fans. At the low setting, when the case temperature is low, the fans don't even turn on, so it's really nice and quiet.

Cons: I wish the interior of the case was black, instead of the plain looking of steel.

Also, you know the place where all the PCI/PCIe brackets are attached to the chasis in the back? They're already secured with screws, so it's kinda weird that Antec decided to add one more bracket on the top to secure all the other PCI brackets. So to change a card, you first need to remove the two screws on this bracket before you can even get to the usual screw that holds the card in place.

Other Thoughts: This is the first case I came across that asks you to mount the SSD on the case chasis. For ~10 minutes, I was looking for a mounting bracket to no avail, and then realized that the four screw holes at the bottom of the case were actually for SSD. I guess this is not really a con.

1 out of 1 people found this review helpful. Did you? Yes No

  • Matthew A.
  • 7/29/2015 5:30:46 PM
  • Tech Level: Somewhat High
  • Ownership: less than 1 day
  • Verified Owner

5 out of 5 eggsA pleasure to use this case!

Pros: This case is great! It was $40 after rebate. Sturdy construction. Easy assembly with no tools necessary for hard drive bay install. The case has excellent cooling. The wire management system is fantastic! A+ job Antec! LORD bless you!

Cons: None

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Item#: N82E16811129180
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