SUB-22 Specs and Guide

Our build method suggestions:

  1. We strongly recommend you read this entire document (or the bits relevant to your intended hardware combination) before purchasing the SUB-22 or any parts you intend to put inside it. We go through various combinations of hardware and the limitations and opportunities that arise. Before and throughout their build, one should be carefully considering necessary cable-routing steps in order to reduce pain down the road.
  2. Slide off the top panel backwards before pulling it carefully off the case. Then perform the same action with the two side panels, before pulling off the front panel. You will do this in reverse when putting them back on.
  3. We suggest you first sort through your PSU cables and work out which are necessary for your build. Plug these into your PSU.
  4. Remove the ATX PSU enclosure from the bottom of the case (it is stowed here for shipping).
  5. Unscrew the Pillar of Loneliness (the MATX support pillar) from its mounting slots. Then unscrew the SFX PSU enclosure from the side mounted position and remove both the Pillar and enclosure from the case, like you did with the ATX PSU enclosure. Lay them all out on the flat surface you are building on.
  6. If your GPU is longer than 316mm, just get it inside the case. It doesn’t have to be screwed in yet, it’ll just be a pain later if more hardware is installed. We talk about this in more detail in the next section. If not, you can skip this step, and just wait until you have installed all other components.
  7. Next, install your PSU in the correct PSU enclosure for your PSU form factor with all cables installed. Don’t install the enclosure and PSU into the case yet.
  8. Install the Pillar if you are using it, and slid both it and the motherboard tray to the desired position (there are screws on the rear plate, top and bottom of the case that secure the tray. They are not captive, so make them loose but there is no need to remove them completely before tightening them again when you are happy with the location of the tray and pillar).
  9. Install the motherboard into the case. Make sure all M.2 drives/AIO pump blocks/tower coolers/RAM sticks have already been installed. We recommend plugging in any cables for fans or external pumps before the fans/radiators/pumps go in, and leave them supported but outside the case while the motherboard goes into the case. This is a good point in time to plug in any other cables such as the CPU 8 Pin or ATX 24 Pin cables. It’ll be tedious to try and install these finicky cables when there is much less room.
  10. The black and white cables from the front power switch are for the switch functionality. These can be plugged in either way around to the front panel pinout on your motherboard. The yellow cable is for the positive LED terminal on the motherboard front connector pins, the red cable for the negative. The LED polarity is important to avoid a burnt out LED, it smells weird and its super frustrating to deal with.
  11. Take all your cooling hardware that is hopefully already plugged into the motherboard and install it in the desired locations subject to the specifications below. As the motherboard tray is installed already, go ahead and route the C14 power cable (big black PSU extension cable) from wherever it is sitting to the PSU location and plug in. Once this is plugged in, install the PSU enclosure into the case. The C14 cable is quite stiff but the panel magnets are strong enough to compress it if it protruding from outside the frame of the case once you have done your best effort to neatly route it.
  12. At this point, go ahead and screw in your GPU whether you have been keeping it inside or outside of the case.
  13. Complete any finishing touches on your SUB-22 build and then whack those side panels back on! Remember, front panel goes on first, then slide the side panels on from back to front before sliding the top panel into place to be nestled in between the other three.

General specifications and scenarios:

  • The front USB-C cable can transfer up to 20Gbps.
  • Max GPU thickness is 86mm.
  • 4 PCIe slots are available.
  • The side opening of the case is not 342mm long, so we suggest at least getting your graphics card inside the case before lots of other components go in if it is longer than 316mm and doesn’t fit sideways through the side opening.
  • The bottom of the case can accommodate up to a 280mm radiator with fans, however the thickness of any bottom-mounted cooling will detract from the 86mm clearance for the GPU’s thickness.
  • The rear 120mm fan mount can fit a 120mm radiator, fan or pump/reservoir with the pump block protruding out of the rear opening.
  • Max tower cooler height is between 169 and 185mm depending on how far forwards or rearwards the motherboard tray has been slid.
    • The builder must ensure their tower cooler does not protrude further left (when looking face on at the motherboard) than the IO slot of the motherboard. The SUB-22’s back panel is inline with the IO shield of the motherboard. Some of the far-left fans on larger tower coolers may have to be removed to accommodate the installation of the tower cooler.
    • It should be easy to tell whether your cooler will protrude too far by simply estimating by eye from an image of it installed on a motherboard online.
  • Two 2.5” SSDs can be mounted behind the motherboard. The builder must mount these before screwing in the motherboard to its standoffs. You won’t have access to the SSD mounting holes from the motherboard side once the motherboard is installed.
  • Two rear holes are available to route any cooling tubes through should an external radiator or pump block be employed.

ITX Mode, SFX/-L PSU front mounted:

  • Front 125mm fan can be squeezed in the lower position provided your PSU cables do not cause a confliction, but the front fan must be installed before your PSU in its enclosure is mounted to the case.
  • 2x140mm or 2x120mm fans or a 240mm radiator can be mounted at the top.
  • 2x140mm or 2x120mm fans can be mounted at the side. This is also a great space for a large pump/reservoir as the pump can face inwards at the bottom of the reservoir.
  • 240mm radiator can be side mounted, but max thickness including fans is 40mm, assuming the motherboard tray is mounted in its forward position (if slid all the way backwards, the max clearance for side mounted fans would be 24mm).
    • Any fans or radiators should also be installed before your PSU is mounted in its enclosure to the case. A 25mm slim 240mm radiator with 15mm slim fans would work well here.
    • If your GPU is less than 192mm long, the max clearance for side mounting 140mm fans only, with motherboard tray in the forwards position (knock off up to 16mm of clearance the further it is slid back), increases to 53mm.
    • If your GPU is less than 210mm long, the max clearance for side mounting 120mm fans and radiator only, with motherboard tray in the forwards position (knock off up to 16mm of clearance the further it is slid back), increases to 53mm.
  • Max GPU length is 342mm provided your PSU cables do not conflict. There should be plenty of space to route them to the rear of the case above the GPU if your GPU takes the full length of the case.

ITX Mode, SFX/-L PSU side mounted:

  • 2x140mm or 2x120mm fans or a 240mm radiator can be mounted at the top.
  • 2x120mm fans, 240mm radiator can be front mounted, however the max GPU length is 342mm, so any thickness of front mounted components will detract from the GPU length clearance.
  • A single 120mm fan can be side mounted in the lower position underneath the SFX PSU enclosure, however this is where many of your cables will be routed, so we recommend using a fan guard to prevent cables from conflicting with fan blades.

ITX Mode, ATX PSU front mounted:

  • Front mounting for fans and radiators are lost.
  • Clearance for side mounted 2x120mm/140mm fans and radiators is limited to 35mm thickness due to larger ATX PSU enclosure.
  • Max GPU length is 342mm however, there is 165mm between the GPU backplate and the ATX PSU mounting plate. To find the space between your front mounted PSU and your GPU backplate, take the length of your PSU from 165mm. One can then decide if there will be suitable room to route cables away based on their flexibility. We suggest highly flexible cables regardless.
  • Length clearance for top fan/radiator mounts is 254mm in this mode. This will allow for 2x120mm fans.

ITX Mode, ATX PSU side mounted:

  • We really don’t recommend you do this, but if you have a really sexy PSU and you want to have it on display, knock yourself out.
  • 1x120mm/140mm fan/radiator can be top mounted at the rear-end of the case.
  • You lose all front mounting capability.
  • GPU is completely unrestricted and can employ the full 342mm of maximum length.

MATX Mode, SFX PSU front mounted:

  • Identical to the first SFX PSU front mounting description, however side mounting capability is lost due to the larger MATX motherboard.

MATX Mode, ATX PSU front mounted:

  • Identical to the first ATX PSU front mounting description, however side mounting capability is lost due to the larger MATX motherboard.