Articles: Cases/PSU
 

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5.25-inch devices are fastened from one side only using a lock with a couple of prongs. This solution ensures reliable fastening, at least if you’ve got only one optical drive.

HDDs are fastened in the same way as in the Thermaltake Element G. The difference boils down to the shape of the screw heads and their rails. The locks that fix the HDDs in their bays work properly in the InWin case.

 

This fastening mechanism is hardly any better than conventional screws. You have to spend the same amount of time and effort but do not get any benefits in terms of noise or vibrations. And if you lose one of the nonstandard screws, you won’t be able to install HDDs into all of the bays. Besides, there is no compatibility with 2.5-inch disks (but you can fasten a couple of such devices right to the bottom of the case).

The expansion-slot brackets are fastened in the same way as in the IW-PE689, using a common bar for every bracket, but you have to use a screwdriver here to remove and attach that bar. The fastening is less tight, too.

The hidden cable compartment is not as deep as in the more expensive InWin model but has to take in more cables because the IW-MG133 doesn’t have the handy HDD connection system of its cousin. Closing that side panel may be a problem.

The cutout for the CPU cooler’s back-plate is rather large, yet may turn out to be not large enough in some situations (when the CPU socket is close to the top of the mainboard).

 

It’s rather easy to assemble a PC in the IW-MG133, yet the other InWin is far easier to deal with.

 

The default ventilation system includes one 120mm fan at the bottom of the front panel. It’s covered with a dust filter and has blue highlighting. The fan is labeled as InWin but its DFS122512L part number suggests that it’s a rebranded Scythe with a simplified connection (to a PATA power connector only). So, the fan is always working at its full speed of 1200 RPM (which is another proof of its origin, by the way). There is another fan seat above it, opposite the top of the HDD rack. It has the same locks for a fan and a dust filter but neither is included by default.

You can also install two 120mm fans on the side panel (their mounting holes slightly differ from the vent openings around them) and one fan on the back of the chassis.

This system case comes with a Power Rebel RB-S500HQ7-0 power supply with a wattage rating of 500 watts (up to 360 watts across its +12V power rail split into two output lines).

The PSU worked normally during my tests and its noise was the lowest among the bundled PSUs, yet quite audible. There is a punched-out vent grid in front of the PSU fan.

The PSU has the following cables and connectors:

  • One mainboard cable with a 24-pin connector (34 cm)
  • One CPU cable with a 4+4-pin connector (35 cm + the abovementioned 35cm extension cord)
  • One cable with a 6-pin graphics card connector (36 cm)
  • One cable with one PATA and two SATA power connectors (40+10+10 cm)
  • One cable with two SATA power connectors (40+10 cm)
  • One cable with one SATA, one PATA and one floppy-drive plug (25+10+15 cm)

The PSU specs are far from impressive. The load capacity of the +12V lines is only 360 watts or 72% of the PSU’s full output power. This is rather low by today’s standards, corresponding to a modern PSU with a wattage rating of about 400 watts. Judging by the input voltage specs, this PSU lacks any kind of power factor correction.

The extremely low weight of the PSU also raises my apprehensions. Its manufacturer seems to have saved on everything possible. So, even though I had no problems during my tests, I wouldn't rely on the bundled PSU in the long run.

You should also note that the PSU's cables are very short. Although there are enough of SATA power connectors, I had to use a PATA-SATA adapter in order to power my optical drive. The main 24-pin power cable could barely reach to the mainboard's plug directly, let alone via the hidden compartment behind the mainboard.

Highs:

  • Large interior
  • Hidden compartment for cables
  • Dust filters for the front fan and the PSU fan
  • Good accessories
  • Rather quiet PSU

Lows:

  • Questionable quality of the bundled PSU
  • No “open” 3.5-inch bay
  • Incompatible with 2.5-inch disks
  • Limited selection of I/O ports
  • No exhaust fan in the default configuration
  • Top half of the HDD rack lacks a fan and dust filter
  • Quick fastening mechanism is poor quality

 

When assembled, the InWin IW-MG133 can hardly impress anyone. On the other hand, it is not meant for beauty contests whereas it is quite easy to assemble and comes at an affordable price.

 
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