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Cooler Master STB-3T4-E3 3X5.25IN to 4X3.5IN Drive Bay Convertor Silver Black w/ 120mm Fan

Cooler Master STB-3T4-E3 3X5.25IN to 4X3.5IN Drive Bay Convertor Silver Black w/ 120mm Fan - 1
Actual product may not be exactly as shown.
Cooler Master STB-3T4-E3 3X5.25IN to 4X3.5IN Drive Bay Convertor Silver Black w/ 120mm Fan - 29431_l.jpg Cooler Master STB-3T4-E3 3X5.25IN to 4X3.5IN Drive Bay Convertor Silver Black w/ 120mm Fan - 29431_1.jpg Cooler Master STB-3T4-E3 3X5.25IN to 4X3.5IN Drive Bay Convertor Silver Black w/ 120mm Fan - 29431_2.jpg Cooler Master STB-3T4-E3 3X5.25IN to 4X3.5IN Drive Bay Convertor Silver Black w/ 120mm Fan - 29431_box.jpg Cooler Master STB-3T4-E3 3X5.25IN to 4X3.5IN Drive Bay Convertor Silver Black w/ 120mm Fan - 29431_3.jpg Cooler Master STB-3T4-E3 3X5.25IN to 4X3.5IN Drive Bay Convertor Silver Black w/ 120mm Fan - 29431_4.jpg Cooler Master STB-3T4-E3 3X5.25IN to 4X3.5IN Drive Bay Convertor Silver Black w/ 120mm Fan - 29431_5.jpg Customer Photos (0)
Reg. Price: $23.98  CAD
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   Shipping Weight:   1.6 lbs
   Part #: STB-3T4-E3-GP
 May We Also Suggest

Features    [ Edit | History ]
Quick Specs:

Cooler Master PCs:

  • CM Stacker 83X
  • Centurion 534
  • Centurion 590
  • CM690
Form Factor Internal
Height 5.1"
Width 6"
Depth 7.2"
Green Compliant Yes
Number of Total Expansion Bays 4
Number of 3.5" Bays 4

Specifications    [ Edit | History ]
General Information  
     Brand Name: Cooler Master
     Manufacturer: Cooler Master Co., Ltd
     Manufacturer Part Number: STB-3T4-E3-GP
     Manufacturer Website Address:
     Product Model: STB-3T4-E3-GP
     Product Name: STB-3T4-E3-GP Hard Drive Module
     Product Type: Drive Bay Adapter
I/O Expansions  
     Number of 3.5" Bays: 4
     Number of Total Expansion Bays: 4
     Additional Information:
  • Cooling System: One 120x120x25 mm Blue LED fan, 1200 rpm, 22 dBA


  • Body: Aluminum
  • Bezel : ABS


Cooler Master PCs:

  • CM Stacker 83X
  • Centurion 534
  • Centurion 590
  • CM690

     Green Compliant: Yes
Physical Characteristics  
     Depth: 7.2" (184 mm)
     Form Factor: Internal
     Height: 5.1" (129 mm)
     Width: 6" (153 mm)

COOLERMASTER STB-3T4-E3-GP Customer Reviews

Product reviews on are screened for relevance and inappropriate content. Reviews may contain inaccurate information about the product. If there is a discrepancy, please use the Flag this Review link located beside each review. Reviews are not an endorsement expressed by, but opinions from customers based on their own experience with a product. We do not recommend you make purchasing decisions based on facts or opinions expressed regarding COOLERMASTER STB-3T4-E3-GP reviews.
Experience: 1 Months
 Verified Owner
Great cheap solution for adding drives.
Well made
Drives fitted well with included screws. The inside has rails so that each drive is easily matched with screw holes.
Side plates have rubber grommets for vibration control - and the fitted side places mean that this slides into place with no need to alter  side rails of 5 1/4 bays.
The blue LED fan contrasts with the red on my HAF932 box - but it's fine.
Compared to other cheap methods of adding drives or adding cooling to drives, this is a great solution at a great price.
The fan could be a problem. While the fan in my fitted cage is fine with Toshiba 3T's and WD 2T greens, it probably won't do well with faster drives, especially with RAID where all the drives are spun up most of the time. I'M doing a huge backup and drives are holding at 30'C - whereas same drives in a simple eSata dock were up to 36'C in light use. So the weak fan does work - for me.
Overall I'm pleased with the two I just bought. The low power fan sucks in air through a grill and so won't need cleaning for years. If a person wants to replace the fan, then first any drives in the cage must be removed. Getting at the 4 screws holding the front plastic facing and grill - is fine with a bent screwdriver, but regular large handled screwdrivers won't have enough clearance. My Leatherman worked fine. The fan is held on with plastic split pins, so more fiddly work to remove those without damage. Clearance is very limited to the fan mounting holes on the other side of sheet metal to fan - sheet metal screws screwed from fan into sheet metal might work, but a nut and bolt solution would probably be best. I'm not sure if plastic split pins are readily available - which would solve everything, but gentle removal will leave the fitted ones OK.
I have fitted a replacement fan in my second cage before adding drives! Overall, though, I still feel that I got a super deal for the price.
The plastic split pins can be removed without damage by pushing the inner pin with a fine screwdriver in the notch from the aluminum frame side. Once the inner pin sticks out on the fan side, remove it and then the outer split pin with fingers and put it somewhere safe. Repeat for other 3. If your case has positive pressure then the weak stock fan won't work well. It may, if turned around to exhaust air. The outer grille, faceplate and inner lint trap mesh are quite a challenge for airflow, so it's worth considering a multi speed fan with higher static pressure - just because those plastic pins might not survive many changes. If CM supplied a few extra plastic pins in the bag of screws, then this cage would be perfect.

This review was modfied by poster @ 04-25-13 06:57 PM

Experience: 20 Days
 Verified Owner
Adds more drive bays to an otherwise unused place.
Fits perfectly in my case, blue LEDs are eyecatching, what's not to like?

Experience: 50 Days
 Verified Owner
Does what it claims well
Purchased for a HAF 932, went in without a hitch. Quiet fan is a bonus.

Experience: 2 Weeks
 Verified Owner
Good price, comes with a blue LED fan.
4 hard drives. One of the better bay converters.
Using 4 hard drives with the stock fan is not good IMO. You should look into a higher pressure fan, like a GELID or even a 2000rpm CM fan if you want to keep your drive heat down.
Changing fan is a pain in the ***
I mostly use these to add more fans to a case. Sometimes I take off the front plate if the case has grill 5.25 bays. Sometimes it looks cool with the design on it. The only thing that is not good is the way the fans is difficult to get off and put back on.

Experience: 2 Weeks
 Verified Owner
Easy to install
Blue LED fan
Fits 4 hard drives in one cage!
Kinda expensive
I got two of these put in my Cooler Master ATCS 840 case. I hate the fact that cooler master cases have so many 5.25in drive bays. Who needs 6 5.25in drive bays these days? Most people are using 3.5in drive bays. Anyways I don't need any as my case is only going to be used as a server build so these work perfectly fine. No issues with installing them. Recommended.

Experience: 1 Months
 Verified Owner
- Solid construction
- Rubber mounts to reduce vibration noise from hard drives
- Quiet fan to reduce drive temperature
- Cheapest 4 drive box solution out there
- None so far!
I bought this item to add more drives to my unRAID NAS using empty 5.25" vacant slots in my case. I was pleasantly surprised to find that the construction is solid and the installation was a breeze with clear instructions. The included blue led fan is quiet and also helps reduce the hard drive temperature. Unless you need hot-swap capabilities it is a great product.

Experience: 14 Days
 Verified Owner
- cheapest 4 HDD bay out there w/ a fan
- rubber gromets to reduce vibration
- all aluminum construction
- fan is the most useless POS I have ever seen. Couldn't blow ash into the wind
The fan is the weak point. So bad that I take two stars off.
For everything else, it does the job to hold your hard drives snug and various hard drive sizes fit.

I replaced the bling POS fan with a scythe 110CFM fan and saw a reduction of 5 degree celcius on each drive and a 1 degree drop  for the CPU.

Experience: 1 Months
 Verified Owner
Adds hard drive slots.
Really quiet fan.
One of the blue LED's keeps flickering
Quiet, but weak fan
Added this in not to get the extra hard drives, but to get the extra airflow for my CPU. Unfortunately, the fan equipped in this thing is incredibly weak, so I'm going to have to get a new case fan for it. Overall though, it does look good in my 690, and it does add four new hard drive slots. Just wish the case fan was good as well.

Dead Things
Experience: 1 Months
 Verified Owner
Standard sizing - compatible with most cases
All-in-one solution including mounting hardware and near-silent cooling
Stock fan is blue LED - may not appeal to some
This is an excellent all-in-one drive bay converter that comes with all the hardware needed for mounting and a blue LED fan to keep the drives cool. I am using this alongside the drive bay converter that came with my Cosmos S to run my file server, which uses 6 drives in RAID5 plus an OS drive. Fan does a good job of keeping the drives cool, even after hours of constant activity during backups. Fan is also reasonably quiet. Build quality is excellent - it can withstand some pretty rough handling, if that's what you're into. Others have had issues installing in slotted drive bays, but the Cosmos S is slotted and I had no such installation problems at all, given that the converter is designed to slide along bay slots. Aesthetically, it fits perfectly with the Cosmos S and looks very much a part of the case and not an after thought. Given the blue LED fan, however, it may not appeal to some. In which case, the fan is easily swapped out for another 120x25 fan of your choosing.

Solid product - happy to recommend and would certainly purchase again should the need arise.

This review was modfied by poster @ 11-24-09 10:12 AM

Firestorm ZERO
Experience: 7 Days
 Verified Owner
- nice design
- easier to install than an iCage
- comes with a fan
- came with screws :D
- you might not like the fan
- changing the fan is hard
Bought this to put more hard drives in my case. Issue is the change the fan, it doesn't seem you can easier remove it and put it back. As the fan is held by plastic nubs but the nubs are so far in and hard to reach, you can't just push them out.

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Messages about Cooler Master STB-3T4-E3 3X5.25IN to 4X3.5IN Drive Bay Convertor Silver Black w/ 120mm Fan

Replacing the fan with Ultra Kaze (Francis_B- Oct 05, 11, 2 Replies) Read this message
Compatible (Steven_H- Oct 19, 09, 1 Replies) Read this message
Replace Fan Included (Alexandre_P- Jul 15, 09, 1 Replies) Read this message
Will it fit HAF 932? (Sab0t8ge- Apr 27, 09, 5 Replies) Read this message
Like in the Centurion 590? (hog- Jun 04, 08, 0 Replies) Read this message
Available? (Coby- May 28, 08, 0 Replies) Read this message
Order... (Akatsuki- May 07, 08, 1 Replies) Read this message

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Product Warranty
NCIX provides limited warranty for this product for 30 days after purchase.

Support For USA, Canada, & Mexico 
Cooler Master USA, Inc.
Unit A - 1951 S Parco Ave.
Ontario, CA

Phone: 1-909-673-9880
Fax:  1-909-673-9882 or 9883

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