M1 Classic (Discontinued)

M1ENC-V61-BB-TW1: M1 Version 6.1, black exterior
M1ENC-V61-SB-TW1: M1 Version 6.1, silver exterior

Mini-ITX, Mini-DTX

• Maximum height: 130mm with side fan bracket installed, 135mm without
• CPU Heatsinks must not extend past the top edge of the motherboard by more than 10mm.
• CPU Heatsinks that extend beyond the front edge of the motherboard may interfere with the 3.5" HDD cage and/or power supply (in the default right-side mounting location).

• Maximum length:
• 322mm (cards up to 45mm (2.2 slots) thick)
• 280mm (cards up to 60mm (3 slots) thick)
• 290mm (cards up to 60mm (3 slots) thick with front I/O ports removed)
• Maximum height (AKA width):
• 140mm at mid-card
• 130mm (first 5mm at back corner)
• 125mm (portion of card over 280mm long)
• Please allow 15-20mm for PCIe power connectors
• Bottom fan support:
• 25mm thick fans: 2 slot (42mm) cards only
• 15mm thick fans: up to 2.5 slot (50mm) cards
• GPU support bracket:
• 2 to 2.5 slot (42mm-50mm) cards only
• Also see M1 GPU Compatibility List

Optical Disc Drive Support(requires optional top panel with ODD slot)

• ODD bracket supports slim slot-loading optical drives in 9.5mm or 12.7mm sizes
• Alternatively, bracket may be used for a single 2.5" drive (up to 14mm thick)

2x 3.5" HDDs supported via removable brackets attached to the fan bracket (uses up one side 120mm fan location)

• Alternatively, brackets can support 3x 2.5" drives (up to 15.5mm thick)

1x 2.5" drive mount on inside-front of chassis (any thickness); also supports mounting of the HDD brackets in 3x 2.5" drive configuration in place of a single 2.5" drive

• Side (fan bracket): 2x 120mm
• Bottom: 2x 120mm
• Rear: 1x 92mm

• 1x 240 radiator or up to 2x 120 radiators are supported on the side fan bracket
• Radiators less than 35mm thick are recommended
• 1x 240 or 2x 120 radiators precludes use of the HDD brackets attached to the fan bracket

• Chassis
  • Adjusted front SFX mount position
  • Adjusted 2.5" mounting holes
  • Adjusted 2.5" drive SATA connector cutouts
  • Added threaded nuts to fan bracket mounting holes
• Front I/O
  • New punch tooling for smoother edges
  • Audio combo jack changed to black
• SFX bracket
  • Added/modified flanges to mitigate possible PSU movement
• ODD bracket
  • Adjusted 2.5" drive mount screw holes for improved stacking bracket support
  • Added chassis mounted 2.5" drive screw access holes
  • Adjusted aux chassis 2.5" drive screw access holes
• Parts box
  • Removed 120mm fan filters
  • Fan grille count changed to 2
  • Adjusted screw counts
• Power cable
  • Changed to right angle

• Front I/O
  • Added USB Type C port (requires motherboard 20 pin Type E header)
  • Changed headphone and mic ports to single combo jack
  • All ports use new molds
  • Redesigned I/O bracket with swappable no-I/O faceplate (ports can be removed for cleaner look/slightly better 2.2+ slot GPU compatibility)
• Chassis
  • Redesigned ventilation holes on bottom and rear to improve airflow
  • Added longer fan mounting slots on the bottom
  • Bottom vents moved to separate steel floor plate attached to underside of chassis
  • Added bottom magnetic dust filter
  • Threaded inserts on PCI bracket
  • Added M4 screw holes for window mounting to chassis
  • Front-right chassis flange reduced, SFX PSU can now be installed from the right side
  • Reduced rear-left chassis flange to facilitate GPU installation
  • Enlarged chassis front GPU passthrough to facilitate GPU installation and provide more room for oversized GPUs
  • Removed four panel mounting clips from side flanges to reduce incidence of oversized GPU conflicts
  • Changed front 2.5" drive mounting to use screws instead of rubber grommets to save space/reduce complexity
  • Integrated fan bracket mount into chassis flanges
  • Added inside-front mounting for SFX PSU
• Motherboard tray
  • Changed to removable standoffs
• ODD bracket
  • Redesigned to single piece, now supports 9.5mm and 12.7mm ODD drives
• HDD cage
  • Redesigned to two pieces, now supports 2x 3.5" drives *or* 3x 2.5" drives; now allows mounting to inside front 2.5" mount (3x 2.5" configuration only)
• Top panel
  • Changed to 2mm thick
• Side panels
  • Extended ventilated area adjacent to GPU
• Other
  • New 15mm tall molded rubber feet
  • New adjustable GPU support bracket (adjustable for 2-2.5 slot cards)

• Front USB 3.0 ports cleaner look (removed port edges flanges)
• Motherboard tray is now fastened with screws instead of rivets to facilitate replacement or modding
• Later batches only:
  • Front USB 3.0 ports color changed from blue to black
  • Removed #6-32 screws for PSU mounting (some users were incorrectly using them in M3-threaded holes, stripping the threads)
    • Re-added for later batches, now in a separate labeled bag

• Fan bracket changed to steel and magnetic filter is now included
• Fan bracket mounts changed to allow 2mm of additional travel (allows 140mm fan w/120mm mounting holes to be used alongside a 120mm fan)

• Braces added to bottom corners of chassis for increased rigidity/decreased probability of wobbling
• 0.3mm decrease in side and front panel height
• Extra QC for wobbling & panel uniformity
• SFX bracket raised 2mm and flange trimmed for better SFX-L support (CAUTION: SFX-L is still a very tight fit with long GPUs, even with the revised bracket)
• Additional motherboard standoffs added for compact mATX boards (226x173mm max w/SFX bracket; see thread and google docs spreadsheet)
• Slightly increased CPU cutout size

• Enlarged CPU cutout upward on motherboard tray
• Additional cutouts at bottom of motherboard tray
• Move rear 92mm fan and tubing holes down 2mm
• Additional 3.5" HDD mounting location at forward bottom of chassis
• Cable tie holes on chassis bottom reduced from 10 to 5
• SSD stacking brackets modified to allow stacked 7mm thick SDDs closer
• ATX PSU bracket moved back to allow more clearance behind chassis front
• 3.5" HDD cage fixed to work in upper fan bracket position
• ODD bracket screw holes reduced for better M2 screw fit
• No top panel screw
• More SSD mounting screws
• Extra side panel clips
• Dome head M5 screws changed to flat head M5
• Shortened internal AC cable, changed to left angle
• Threaded inserts at side bracket mounting points
• Sub-millimeter increases to exterior panel dimensions to mitigate panel warping
• Feet color changed to black for silver cases