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Item#: N82E16811156306

RAIDMAX Seiran II ATX-302WB Black/Orange Steel / Plastic ATX Mid Tower Computer Case

  • Steel / Plastic ATX Mid Tower
  • USB 3.0 x 1, USB 2.0 x 2, Audio x 2(HD compatible) Front Ports
  • 3 External 5.25" Drive Bays
  • 3 Internal 3.5" Drive Bays
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RAIDMAX Seiran II ATX Mid Tower Computer Case

RAIDMAX Computer Case

RAIDMAX Computer Case
RAIDMAX Computer Case

1. Supports 120mm radiators in the rear.

RAIDMAX Computer Case

2. Top: 2 X 120mm OR 1 X 140mm Fan (optional)

RAIDMAX Computer Case

3. Bottom-mounted PSU.

RAIDMAX Computer Case

4. Tool-free installation design

RAIDMAX Computer Case

5. 3.5" HDD racks also available for 2.5" HDD or SSD installation.

RAIDMAX Computer Case
  1. Front-mounted USB 3.0 X 1, Usb2.0 X 2 and HD Audio Ports X 2
  2. Special design side panel for cable management creates more space behind the motherboard.
  3. Supports maximum 390mm length VGA cards.

Basic Specifications

External Drive Bays 3 x 5.25"
Internal Drive Bays

3 x 3.5" HDD or 3 x 2.5" SSD

System Board ATX / Micro ATX / Mini-ITX
Expansion Slots Standard ATX 7 Slots
I/O Ports 1 x USB 3.0 + 2 x USB 2.0 / 2 x HD Audio

Cooling System

Front: 2 x 120mm LED fan (optional)
Side: 1 x 120mm LED fan (optional)
Back: 1 x 120mm Black frame with Black leaves fan

2 x 120mm or 1 x 140mm fan (optional)

Bottom: None

Learn more about the Raidmax ATX-302WB

Quick Info


  • Limited Warranty period (parts): 1 year
  • Limited Warranty period (labor): 1 year

Customer Reviews of the Raidmax ATX-302WB

Do you own this product? Write a Review

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  • Dana C.
  • 12/2/2014 1:47:57 PM
  • Tech Level: Somewhat High
  • Ownership: 1 day to 1 week
  • Verified Owner

4 out of 5 eggsGood but could be a little better

Pros: 1. looks really good for a $50 case
2. I mounted a fan on the window fan mount and it shoots cool air right onto my GPU and CPU
3. easy to remove front 5.25" trays
4. not to thick but not to thin side door metal
5. fan controls

Cons: 1. a bit small, my mother board is about 1cm from the power supply
2. break away panels at back, I broke one of the fins for my GPU off then I noticed it was the wrong one sad I couldnt put it back on.

Other Thoughts: great case for the cash

Did you find this review helpful? Yes No

  • Shaun J.
  • 10/31/2014 6:40:36 PM
  • Tech Level: Somewhat High
  • Ownership: 1 week to 1 month
  • Verified Owner

5 out of 5 eggsI like it

Pros: Enough room for the big dog graphics cards, fit a r9 280 in there with very minimal rubbing from the side window fan :)
I liked the look, lots of room in the back for cable management, all black interior, everything was in good shape when I got it, enough spots for new fans. Very neat looking on the inside after all the cables were tucked away :)

Cons: Hyper 212 evo barely fit in it, but I did manage to get the side on, so it didnt lose an egg for it :) Limited drive space, be it hard drive or disc.

Other Thoughts: Never bought anything from Raidmax before, but I would do it again. The only thing I truly hated about this case was the orange color, but it wasn't for me so I bought it :P
For under $50, great case. Everything you need, even up to entry level water cooling.

Did you find this review helpful? Yes No

  • Anonymous
  • 10/7/2014 5:43:33 PM
  • Tech Level: Somewhat High
  • Ownership: 1 week to 1 month

5 out of 5 eggs

Pros: I bought this case to use as my work/play/HTPC computer, and it fitted my purpose perfectly. It has more expansion capability than a MINI-ATX, and is not as bulky as a full ATX tower. Above all, it looks good besides my home theatre setup for the cheap price. Also, the case is very quiet with a 430 watt corsair power supply and an i3 CPU with integrated video card. it has plenty of air flow to keep the parts cool. the build quality is more than satisfactory, and nice-to-have features like front mount USB and tool-free mounts are included

Cons: it would be nicer to have 1 of the 5.25 bays converted to 3.5 bay instead. I guess no one needs that many 5.25 bays, but I guess I can just get a converter if there will ever be a need

Did you find this review helpful? Yes No

  • Anonymous
  • 10/7/2014 4:24:02 AM
  • Tech Level: Somewhat High
  • Ownership: 1 week to 1 month

5 out of 5 eggsVery Nice Case

Pros: The case seems pretty well built for the price and rebates I had gotten it for. There is a lot of fan slots and it is not as big as you think. There is a lot of fan slots and plenty of room for anything you need.

Cons: There's nothing really I can say is bad about this product.

Did you find this review helpful? Yes No

  • Daniel A.
  • 9/18/2014 11:35:14 AM
  • Tech Level: Somewhat High
  • Ownership: 1 week to 1 month
  • Verified Owner

4 out of 5 eggsNice Case

Pros: Pretty sturdy. Has no manufacturing defects that I can see. Handle is solid on the top. Good airflow and window options. Nice color combo. Everything seems to fit, decent cable management. I do like the screwless ROM bays, HDD bays are, ehh, they work.

Cons: Not that much space for extras (like radiators). I say it is a good budget case. I do not like the front fan arrangement (Spoiler, it come with one fan, in the back). For the front fan, one has to use the supplied, non-fan-screw-extenders, and you only get four; and it will rattle if all four are not used on ONE fan. Even though there is space for two. Called Raidmax on this and the said to contact the rma@ raidmax for options on ordering more extenders...can't wait.

Other Thoughts: For me, just having 3 HDD racks is well, limited. Also, for me, the lack of solid orange LED fans on the market (at a decent price) makes this case very limited in presentation. Red is...passable, maybe, and blue is hideous, and green too. Have owned numerous Raidmax cases, and will say this is not my favorite, but definitely works fine for average users and gamers. Power users, find something better, (from Raidmax).

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

  • Michael V.
  • 7/16/2014 12:29:49 PM
  • Tech Level: Somewhat High
  • Ownership: less than 1 day
  • Verified Owner

1 out of 5 eggsConstruction Defects

Pros: None

Cons: Looking at the back of the case, top right corner was smashed during manufacture. The personnel on the assembly line forced the door on the case anyhow breaking two of the transparent panel mounts.
I repaired the dent enough for the door to screw on, and super- glued the two mounts. The hard drive brackets are wobbly. The rest of the parts for this kit haven't arrived, so I don't know if anything else is damaged on this case (fan control etc.).

Other Thoughts: Returning is a real hassle under my circumstances, so I repaired this as much as possible, since it is for personal use.

Manufacturer Response:

Dear Customer,
First we like to thank you for your review.
We are sorry to hear that you are not satisfied on the case.
The dents can happen during the process of shipping & handling or maybe during the production of this case there was a human error.
Again, we apologize.
If you have any other questions or concerns, please send a email to for faster respond/service.
We appreciate you choosing Raidmax products.

-Raidmax Support Team

0 out of 2 people found this review helpful. Did you? Yes No

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Item#: N82E16811156306
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