One aluminium enclosure in three anodised colours for an on-prem AI desktop server. Drawing set rev C.

Brainwave is an on-prem AI desktop server designed in Bangkok. All three tiers share the same exterior parts and the same base material. Only the anodise colour and a few interior brackets change.
| Tier | Compute | Exterior finish | Board plate | PSU | Heat (est.) | Mass (est.) |
|---|---|---|---|---|---|---|
| Silver | NVIDIA RTX Spark N1X (Grace), 128 GB | Silver (clear anodise) | BW3-210 mini-ITX | SF750 | 192 W | 10.2 kg |
| Copper | Ryzen 7 9700X + RTX PRO 4000 Blackwell | Copper colour anodise | BW3-211 deep mini-ITX | SF750 | 307 W | 12.2 kg |
| Gold | Ryzen 9 9950X (120 W cap) + RTX PRO 6000 Max-Q 300 W | Gold colour (champagne) anodise | BW3-211 deep mini-ITX | SF1000 | 576 W | 12.8 kg |
Mass includes components. Enclosure parts only: Silver 7.7 kg, Copper 7.8 kg, Gold 7.8 kg (sheet 3). Source: drawing sheet 23 tier matrix.

Order quantity and target budget are not decided yet. Please quote by quantity tier, for example:
Made parts in the BOM (sheet 3, 40 lines): shell sleeve, top cap and twist latch, plinth and base, interior sheet-metal frame, finishing, PEM install. Please state which standard hardware you can also source.
Over fin tips and smooth bands
Units mm, 3rd angle projection, general tolerance ISO 2768-mK.

| P/N | Part | Size / thickness (mm) | Material | Qty | Tier | g |
|---|---|---|---|---|---|---|
| Exterior and sleeve | ||||||
| BW3-100 | Shell sleeve (101 + 102 + 103 bonded) | assembly | Al 6061-T6 | 1 | S/C/G | - |
| BW3-101 | Lower body, smooth band, rear I/O | 196 × 341, z15..125, wall 3.0 | Al 6061-T6 | 1 | S/C/G | 994 |
| BW3-102 | Rib band, 21 fins, 80 hidden slits | 196 × 341, z125..336, core 3.0 | Al 6061-T6 | 1 | S/C/G | 2594 |
| BW3-103 | Top cap with carry grip | 196 × 341, z336..400, d124 | Al 6061-T6 | 1 | S/C/G | 1214 |
| BW3-104 | Logo window, PC half-disc | R43.85 × 3.5 | PC Lexan 9034 | 1 | S/C/G | 13 |
| BW3-105 | Plinth, perforated slanted tray | 166 × 311, t1.0 | Al 6061 T4>T6 | 1 | S/C/G | 173 |
| BW3-106 | Base plate | t3.0 | Al 6061-T6 plate | 1 | S/C/G | 394 |
| BW3-107 | Foot ring | sheet 14 | Al 6061-T6 | 1 | S/C/G | 11 |
| BW3-108 | Foot strip, silicone | 2.0 × 1.5 × 760 | Silicone 50A | 1 | S/C/G | 2 |
| BW3-110 | Power button cap | d11 | Al 6061-T6 | 1 | S/C/G | 2 |
| BW3-111 | Intake filter | d140 | PET mesh 80 µm | 1 | S/C/G | 6 |
| BW3-112 | Sleeve base seal | EPDM sponge 1.2 | EPDM | 1 | S/C/G | - |
| BW3-115 | Vent liner, side, perforated | 302 × 199 × 0.3 | SS304 | 2 | S/C/G | 18 |
| BW3-116 | Vent liner, front, solid | 154 × 199 × 0.3 | SS304 | 1 | S/C/G | 9 |
| BW3-117 | Vent liner, rear, perforated | 154 × 199 × 0.3 | SS304 | 1 | S/C/G | 9 |
| BW3-118 | Sleeve lead-in guide | 4.4 × 24 × 22 | POM-C | 4 | S/C/G | 3 |
| BW3-119 | Sleeve dowel ISO 8734 | 4 × 12 | Steel, hardened | 4 | S/C/G | 1 |
| P/N | Part | Size / thickness (mm) | Material | Qty | Tier | g |
|---|---|---|---|---|---|---|
| Top cap twist latch | ||||||
| BW3-301 | Latch knob spider | d96 | Al 6061-T6 | 1 | S/C/G | 31 |
| BW3-302 | Half-moon flip tab | R43.85 × 3.5 | PA66-GF30 | 1 | S/C/G | 14 |
| BW3-303 | Latch shaft | d8 × 25, head d12 | 17-4PH H1025 | 1 | S/C/G | 11 |
| BW3-304 | Bayonet cross pin | ISO 8734 4 × 20 | Steel, hardened | 1 | S/C/G | 2 |
| BW3-305 | Latch receiver plate | 90.5 × 50 × 5 | Al 6061-T6 | 1 | S/C/G | 59 |
| BW3-306 | Cam ring, 2 ramps | OD36 × 6 | 17-4PH H900 | 1 | S/C/G | 42 |
| BW3-307 | Knob retainer, 2 arms | t2.2 | POM-C | 1 | S/C/G | 3 |
| BW3-308 | Antenna carrier | sheet 11 | POM-C | 2 | S/C/G | 2 |
| Interior frame (sheet metal) | ||||||
| BW3-201 | Base tray | t2.0 | 6061 T4>T6 | 1 | S/C/G | 232 |
| BW3-202 | Sea wall, front | t3.0, flat 381.8 × 177.6 | 6061 T4>T6 | 1 | S/C/G | 505 |
| BW3-203 | Sea wall, rear | t3.0, flat 381.8 × 177.6 | 6061 T4>T6 | 1 | S/C/G | 506 |
| BW3-204 | Frame top rail | 12 × 14 × 180 bar | 6061-T6 | 2 | S/C/G | 78 |
| BW3-206 | Rail saddle | t3.0, flat 33.3 × 90 | 6061 T4>T6 | 2 | S/C/G | 23 |
| BW3-207 | Hot deck, 3 pieces | t1.5, flat | 6061 T4>T6 | 1 | S/C/G | 191 |
| BW3-210 | Board plate, mini-ITX | t3.0, flat 238.8 × 172 | 6061 T4>T6 | 1 | S | 332 |
| BW3-211 | Board plate, deep mini-ITX | t3.0, flat 238.8 × 172 | 6061 T4>T6 | 1 | C/G | 332 |
| BW3-240 | GPU top bracket | t2.0, flat 66.6 × 120 | 6061 T4>T6 | 1 | C/G | 27 |
| BW3-241C | GPU tail rest, Copper | t2.0, flat 65.4 × 121.2 | 6061 T4>T6 | 1 | C | 43 |
| BW3-241G | GPU tail rest, Gold | t2.0, flat 82.8 × 121.2 | 6061 T4>T6 | 1 | G | 54 |
| BW3-250 | SFX-L PSU hanger | t2.0, flat 97.1 × 125 | 6061 T4>T6 | 1 | S/C/G | 41 |
| BW3-251 | PSU foam block | PU 30 kg/m³ | PU foam | 1 | S/C/G | 4 |
| BW3-270 | Cable channel | t1.0, flat 33.6 × 316.6 | 6061 T4>T6 | 1 | S/C/G | 29 |
| BW3-280 | Rear I/O bracket | t1.5, flat 43.4 × 40 | 6061 T4>T6 | 1 | S/C/G | 6 |
Source: sheet 3 BOM, sheets 5 to 21 for sizes. g = estimated mass per BOM line from sheet 3. Hardware (screws, PEM, dowels) on sheet 4. S/C/G = Silver / Copper / Gold.
All tiers, shell and interior. Interior sheet is formed in T4 and aged to T6. No copper, gold or other precious metal is used anywhere.

| BW3-101 | lower body wall | 3.0 ±0.1, R15 inner corner |
| BW3-102 | core wall / fins | 3.0 / 4.8 ±0.05 |
| BW3-103 | knob pocket floor web | 3.0 |
| BW3-106 | base plate | 3.0 |
| 202 / 203 / 206 / 210 / 211 | sea walls, saddle, board plates | 3.0 |
| 201 / 240 / 241 / 250 | tray, GPU, PSU brackets | 2.0 |
| 207 / 280 | hot deck, I/O bracket | 1.5 |
| 105 / 270 | plinth, cable channel | 1.0 |
| 115 / 116 / 117 | vent liners (SS304) | 0.3 |
Edges break 0.2 to 0.4 unless stated. Surface Ra 1.6 unless stated.










| Feature | X | Z | Size (mm), tol +0.1/0 |
|---|---|---|---|
| IEC inlet | 0 | 34 | C6 (Silver) · C14 27.8 × 20.0 (Copper / Gold) |
| Power button | -47 | 34 | d11.6 +0.1/0, cap d11 |
| USB-C 1 | 47 | 30 | 9.2 × 3.6 |
| USB-C 2 | 47 | 39 | 9.2 × 3.6 |
| RJ45 | 70 | 36 | 16.3 × 14.0 |
Connectors mount on frame bracket BW3-280; sleeve cut-outs clear them by +0.5 all round. Front is sealed, no openings.

| General | ISO 2768-mK machined, ISO 2768-m sheet, ISO 13920-B weld |
| Datums | A base face of 101 flatness 0.05 · B rear face ⟂ A 0.05 · C centre plane |
| Sleeve locate | 4 dowels d4 m6 in N7, sockets d4.1 H8 × 7, TP 0.05 |
| Sheet bends | Angle ±0.5°, flange ±0.15, flats per DXF; PEM holes +0.08/0 |
Reduced-order models, to be confirmed on the prototype. GPU die temperature was not simulated directly.
| Tier | Fan rpm | dBA | CPU Tj at 25 °C | CPU Tj at 35 °C | |
|---|---|---|---|---|---|
| Silver | 1150 | 22.0 | 68.2 °C | 75.0 °C | Pass |
| Copper | 770 | 13.3 | 51.7 °C | 61.7 °C | Pass |
| Gold | 1370 | 25.8 | 58.4 °C | 68.4 °C | Pass |
Limits: Tj 95 °C, and 85 °C at 35 °C room. Fan rpm and dBA at the 25 °C design point. Heat load 192 / 307 / 576 W.



STEP is the master geometry for CNC. Drawings control tolerances, threads, finish and inspection.
Quantity and budget are not decided yet.
The drawing set has 16 open items (sheet 25). Your input on the ones marked mechanical and purchasing is welcome. See the next slide.
Contact: Brainwave, Bangkok.
| # | Item | Description | Owner |
|---|---|---|---|
| 01 | IEC inlet | C6 is 2.5 A; Copper / Gold need C14 (10 A). Final P/N and cut-out TBD | electrical |
| 02 | Exhaust area | 163.8 cm² free behind liner; CFD OK (Gold Tj 58 °C); confirm with prototype smoke test | thermal |
| 03 | Detent code | MISUMI C-BPK3 and Smalley CM12-M5 wave spring codes to confirm | purchasing |
| 04 | Hard stop | Latch end stop and ramp profile not modelled in 3D; define on cam BW3-306 | mechanical |
| 05 | Tab | Held flat by gravity + detent only; consider a small magnet or spring | design |
| 06 | BW3-211 | Deep mini-ITX hole pattern is placeholder until board P/N is fixed | mechanical |
| 07 | Connectors | Switch, USB-C, RJ45 keystone, IEC P/N TBD; cables unplugged before lift | purchasing |
| 08 | GPU | GPU bracket screw positions TBD with sample card | mechanical |
| 09 | CLS-M5 | Hole size for PEM CLS-M5 to verify vs bulletin | mechanical |
| 10 | Silver | No fin duct: air may bypass the fin stack; add duct if prototype shows it | thermal |
| 11 | BW3-207 | Hot deck is 3 pieces; fixing tabs / screws not yet modelled | mechanical |
| 12 | Sleeve bond | DP490 + dowels at seams vs one-piece machining; band stiffness of thin 101 wall to check | mechanical |
| 13 | Riser | PCIe x16 riser cable P/N and routing open | purchasing |
| 14 | Silver board | N1X board mechanical data pending; BW3-210 uses mini-ITX | mechanical |
| 15 | Antennas | Deep spokes 0/180 pass close to the antennas; RF test needed | electrical |
| 16 | 6061 sheet | Confirm bend R = t and perforated 6061 stock for BW3-105 with the fabricator | purchasing |
Items 9, 12 and 16 are where your process knowledge helps most.
One sheet per slide. Click a drawing to view it full screen, click again for 100 % zoom, or open the full-resolution PNG.