Skip to: | | - A great place to buy computers, computer parts, electronics, software, accessories, and DVDs online. With great prices, fast shipping, and top-rated customer service - once you know, you Newegg.

If you are reading this message, Please click this link to reload this page.(Do not use your browser's "Refresh" button). Please email us if you're running the latest version of your browser and you still see this message. - Computer Parts, Laptops, Electronics, HDTVs, Digital Cameras and More!

PremierTry Message.
Home > 
Components > 
Computer Cases > 
Computer Cases > 
Antec > 
Item#: 9SIA24G28N3956

Antec Twelve Hundred V3 Black Steel ATX Full Tower Unbeatable Gaming Case

  • Steel
  • ATX Full Tower
  • Up to 9 Internal 3.5" Drive Bays

ICON Loading...
  • Overview
  • Specifications
  • Warranty & Returns
  • Reviews

The Unbeatable Gaming Case
Antec's Twelve Hundred V3 gaming case combines maximum performance, cooling and compatibility in a full-tower package. Thirteen drive bays, space for graphics cards as large as 17.5", a CPU cutout, an internal 2.5" SSD drive mount, and newly integrated USB 3.0, all come together for a robust foundation for your components. The Twelve Hundred V3 features a top Big Boy 200™ blue LED cooling fan, two rear blue LED 120mm fans and three front blue LED 120mm fans. Apart from standard size power supplies, the Twelve Hundred V3 can accommodate Antec's CPX form factor PSUs. Outfit your components and maximize their performance with Antec's Twelve Hundred V3.


Twelve Hundred V3

Unbeatable cooling system, including a top 200 blue LED fan and five 120mm fans

Twelve Hundred V3

Convenient top accessory tray and front mounted USB and HD audio ports

Twelve Hundred V3

Filtered front panel takes in air efficiently and prevents dust buildup

Twelve Hundred V3

Stylish windowed side panel lets you show off all your hardware

Twelve Hundred V3

Front Panel USB 3.0 port


Model Twelve Hundred V3
Case Type Full Tower Case
Color(s) Black
Cooling System
  • 2 rear 120mm blue LED exhaust fan
  • 1 top 200mm Big Boy 200&tradel blue LED exhaust fan
  • 3 front 120mm blue LED intake fans with front speed control
  • 1 window side panel 120mm fan slot
  • 1 middle 120mm fan bracket
Drive Bays
    13 Drive Bays:
  • External 3 x 5.25"; Internal 9 x 3.5" for HDD, or
  • External 6 x 5.25"; Internal 6 x 3.5" for HDD, or
  • External 9 x 5.25"; Internal 3 x 3.5" for HDD or
  • External 12 x 5.25 for HDD
  • And internal 1 x bottom-mounted 2.5" SSD drive
Front Ports 3 x USB 3.0
Audio In and Out (AC'97 and HDA compatible)
Expansion Slots /
Video Card Size
7 Expansion slots
Maximum video card size: 17.5" (444mm) (Note: some video cards may require removal of the adjacent hard drive cage)
PSU Not included
Motherboard Support Mini-ITX, Micro-ATX, Standard ATX
CPU Cutout Yes
Cable Management Yes
Side Panel Features 1 Window side panel 120mm fan slot
Dimensions (H x W x D):
  • Unit Dimensions
  • 22.9 x 8.4 x 20.2"
  • (582 x 213 x 513mm)
  • Package Dimensions
  • 25.6 x 11.8 x 23.6"
  • (650 x 300 x 600mm)
Weight Net Gross: 31.3lbs (14.2kg)
Gross Weight: 38.6lbs (17.5kg)
Special Features Powerful cooling system with large 200mm top-exhaust blue LED fan, two 120mm intake fans and one rear 120mm exhaust fan
Stylish, perforated front panel includes fan control knobs plus built-in washable air filters to minimize dust intake
Seven expansion slots to support multiple graphics cards, including NVIDIA 3-way SLI®
CPU cutout allows for easy installation of CPU coolers
Maximum video card size: 17.5" (444mm) (Note: some video cards may require removal of the adjacent hard drive cage)


Twelve Hundred V3 Twelve Hundred V3 Twelve Hundred V3Twelve Hundred V3

Learn more about the Antec Twelve Hundred V3

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 Twelve Hundred V3

Do you own this product? Write a Review

ICON Loading...

Filter Results

  • JANI B.
  • 5/27/2016 1:47:19 PM
  • Ownership: 1 week to 1 month
  • Verified Owner

4 out of 5 eggsHappy with purchase

Pros: Big , Cool , Looks and Wind wise. Once you go full , you never go back ;) I fully expect this case to last me forever or until I give it to my son

Cons: the cable management is hard . like mentioned in other reviews it is a tight fit. nonetheless it worked out for me.

the one real flaw is the 2.5 SSD drive holder at the bottom . Nice idea but they obvious didn't give a second thought as to weather it was functional . I installed my SSD only to find the it was so low that connecting a power cable to it was impossible. Just a bad design feature . That's why I knock off one egg. if your going to offer something , make sure its useable.

other than purchasing a 2.5 adapter bracket , its great ^_^

Other Thoughts: Worth the buy , but shop around a bit to see something is better , aka the feature flaw mentioned in the cons .

Did you find this review helpful? Yes No

  • Sabrina D.
  • 5/10/2016 11:51:35 AM
  • Ownership: 1 month to 1 year
  • Verified Owner

4 out of 5 eggsSolid case

Pros: Real solid and durable
lots of room to work with
good fan configuration

Cons: no options for fixed water cooling(not compatible with the h105 water cooler, had to problem solve to install it.)
very heavy

Other Thoughts: excellent for various size motherboards and enough room to install many cards. can take a beating

Did you find this review helpful? Yes No

  • Vincent W.
  • 5/2/2016 8:10:53 PM
  • Ownership: 1 month to 1 year
  • Verified Owner

5 out of 5 eggsAwesome Case

Pros: This case provides excellent airflow and a lot of space to work with. Front panels for SSDs placement are really neat.

Cons: This thing is heavy. No jokes.

Other Thoughts: Definitely recommend.

Did you find this review helpful? Yes No

  • Andrew W.
  • 4/8/2016 6:18:31 AM
  • Ownership: 1 week to 1 month
  • Verified Owner

5 out of 5 eggsplenty of flow, good case

Pros: i have plenty of flow even not running 2 of the front fans (the mother board i got did not have enough fan power plugs. waiting for adapter).
you can hide all the power cords so in the case all you see is a sexy motherboard, CPU fan, RAM and a big video card all glowing a slightly blue.
quieter than i thought it would be.

Cons: Bigger than i thought it would be but that is because i normally get mid towers.
i also did not read the description well because it said 5 fan 2 extra fan slots. i thought it was 7 fans.

Did you find this review helpful? Yes No

  • Robert P.
  • 3/2/2016 8:51:11 PM
  • Ownership: more than 1 year
  • Verified Owner

4 out of 5 eggsSpacy, well built

Pros: nice and spacey enough air to breathe, well built, comes with fan filters and removable hdd cage. the design sortof keeps dust away.

Cons: heavy but it's mainly steel so its not really a con, the egg missing is for the fan wires that come with the case kind of only hang freely cant really hide them, the fans that come with it aren't what you pay for so that explanes why my top exit fan died after 17 months

Other Thoughts: yes i recommend it if you dont want to move it around alot like place to place . i would buy it again just so i dont have to clean out the dust from the crannies of it but then again its the perfect water cooling space. i think it's made in USA too not sure.

Did you find this review helpful? Yes No

5 out of 5 eggsLove it

Pros: its an antec what else is there to say great cooling, plenty of room inside just a great case

Cons: the fan connectors are 3 pin and no way to piggie back them like the old connectors, so i dont have all my fans up and running yet

Other Thoughts: as a case yeah i would say get it worth every cent
my rig
GIGABYTE G1 Gaming GA-Z170X-Gaming 7
CORSAIR Vengeance LPX 32GB (4 x 8GB) 288-Pin DDR4 SDRAM DDR4 3000 (PC4 24000)
ntel Core i7-6700K 8M Skylake Quad-Core 4.0 GHz
EVGA 220-G2-0750-XR 80 PLUS GOLD 750W ECO
DEEPCOOL GAMMAXX 400 CPU Cooler 4 Heatpipes 120mm PWM Fan with Blue LED

Did you find this review helpful? Yes No

  • Owen S.
  • 2/4/2016 6:23:41 PM
  • Ownership: more than 1 year
  • Verified Owner

5 out of 5 eggsJust what I wanted

Pros: Fits a lot of drives, plenty of room for fans and GPU, cable management, et al. Part installation is easy and roomy. Build quality is very good and I think it looks quite lovely.

Cons: Doesn't come with a rear fan or complimentary PSU, or a brick of gold inside. Really though, the only con is its size, but if you don't need the space for more HDDs or GPUs, Antec offers smaller cases. It's just a matter of need and preference.

Other Thoughts: I would recommend this if you have a lot of hard drives, need good air cooling, or think that down the road you will be upgrading your machine.

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

  • Charlene L.
  • 1/31/2016 10:39:00 AM
  • Ownership: 1 month to 1 year
  • Verified Owner

5 out of 5 eggsBig but everything fits!

Pros: Big but everything fits without having to cram it in there. Lots of room for additions.

Cons: Make sure you have the space for this.

Other Thoughts: I will change the lights to red to suit myself

Did you find this review helpful? Yes No

  • John S.
  • 1/7/2016 9:37:13 AM
  • Ownership: 1 month to 1 year
  • Verified Owner

2 out of 5 eggsLeaves something to be desired

Pros: Nice large case, more than enough room for ALMOST everything.

Cons: Don't buy this expecting to put in a 240MM radiator, even the ones ANTEC makes will not fit.

Other Thoughts: The upper and lower tanks on the double cooler hit.

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

  • Brian A.
  • 12/30/2015 8:29:22 PM

2 out of 5 eggsIt's time to retire this case.

Pros: The best thing about this case would be the six fans it comes with. They do a fantastic job of keeping your rig air cooled. And they have a nice blue glow, which is my favorite color—so there's that. Hooked up to a good motherboard, the fans won't run at top speed all the time, so they're very quiet.

The case is largely made of steel, so it is strong.

The side window is large, so you can show off your gear.

You can place your power supply at the bottom of the case.

The three front filters and the one side filter prevent a lot of dust from ever reaching your CPU and GPU fans.

The side panels are very easy to remove.

Cons: As big and heavy as this case is, it is horribly crowded front to back. If it were another two inches longer, it would be fairly roomy. As it is, the same front fans and filter assemblies doing such a great job of keeping the case cool and clean also rob precious space needed for cabling. The rear of your SSD and hard drives will practically touch the motherboard, so cables will be fighting with each other for elbow room, as you struggle to put your rig together inside the smallest big case I've ever seen. Once the three drive trays go in, the interior of this case shrinks fast.

There is no included 2.5 to 3.5 adapter tray for SSD drives.

This case no longer comes with an internal speaker, needed for troubleshooting. It used to. But someone is trying to squeeze profits a little too hard.

The blue LED glow of five out of six fans cannot be turned off without breaking something.

The power switch is EASY to hit by mistake. You must use BIOS to change require holding it down four full seconds before powering off. Otherwise, you will turn the computer off when plugging or unplugging headphones, moving the case, or even just touching the case. It's not recessed. It's located in a spot you would naturally grab. It looks good, but was ill-conceived.

The front headphone & microphone jacks aren't labeled in any way.

Each of the three bay cages are held in place by eight thumb screws, four on each side. To remove a cage, you have to remove both side panels and eight thumb screws. The filters cannot be cleaned otherwise. I think I did that one time before removing all screws from the right side (as seen from the front) and two on the left side, that each cage is held in place by two screws. Even that is probably one too many. Unless the computer is mounted on a mechanical bull, you do not need eight screws per cage. This is one of the dumbest designs I've ever seen in a computer case.

The V3 version of the case has cheap thumb screws: knurled plastic molded onto regular machine screws. These used to be all metal, much nicer, much higher quality. Again, someone is trying to squeeze profits out of this overpriced beast.

The fans use three-pin connectors, not four, which is what you find on new motherboards. The fans turn at full speed; the motherboard will not be able to alter the fan speeds based on temperatures. The motherboard will detect how fast the fans are turning, for whatever good that does. The fan cables will likely prove too short to reach all available motherboard connectors. And there are six of them. I had to buy a two way (for the rear fans) and a three way Y adapter (for the front fans) to connect all six fans to the three motherboard headers on my motherboard, costing me another $20.

I already mentioned how the case ends up too small front-to-back. It's also too small side-to-side. Specifically, there's not enough room between the motherboard and right side panel to route thicker cables (such as the big ATX cable) out of the way. Big power cables get to take up room needed to effectively run drive cables.

One final kick in the pants: Your graphics card will not easily bolt down to its port at rear of the case. With both cases I've bought (six years apart, mind you), I have to push the rear of the case forward to get the GPU bracket to align with the rear port enough to bolt the card into place. And I mean push hard. No telling what this means for the motherboard or graphics card over the long term.

Other Thoughts: In 2009, when I first bought one of these, it was the biggest, baddest kid on the block. Most cases were much smaller and very cheap-looking. The 1200 appealed most to those who could afford it (over $200 at the time). They are cheaper now, because they were overpriced then, and because select features have been reduced.

Today, you can get cases that will afford a more pleasurable building experience. I would never buy another Antec 1200. This design wasn't the best when introduced; today, it just makes you wish you had shopped around a little more. Thermaltake, especially, offers a wide range of attractive alternatives.

The Antec 1200 has serious drawbacks that making building a real headache. The design needs to be thrown out—not revised.

To be a contender again, the Antec 1200 would need the following: Fan filters that can be removed without unscrewing and moving entire drive cages. Twice as much room between the motherboard and right side panel. Tighter tolerances for easily mounting PCIe cards. Fan LED lighting that can be disabled. Longer fan cables. Y adapters for all the fan cables. At least one 2.5 to 3.5 bay adapter for SSD drives. More cable ties. Cable guides behind the motherboard. More room between the rear of the drive cages and the side of the motherboard. All-metal thumb screws. A recessed or smartly designed power switch. Labels for the front headset and microphone jacks. More flexible cabling for the front USB ports. An internal speaker.

So, basically, it would need to become another case entirely.

6 out of 9 people found this review helpful. Did you? Yes No

Compare Offers from All Sellers newegg

Seller Name & Rating Offer Details  
ICON Loading...
Selected Items

Best Service Sellers

Are you an E-Blast Insider? Subscribe Newegg e-Blast
Shop without retyping payment details. Secure shopping made faster.
Check out with PayPal.
Home > 
Components > 
Computer Cases > 
Computer Cases > 
Antec > 
Item#: 9SIA24G28N3956
If the Adobe Reader does not appear when you click on a link for a PDF file, you can download Adobe Reader from the Adobe web site.