GIGABYTE Z790 AORUS Master E-ATX Width & Side-Interface PSU Cable Grommet Alignment
Flagship PC components require careful structural verification before assembly. The GIGABYTE Z790 AORUS Master is an Extended ATX (E-ATX) motherboard measuring 260mm in total width—16mm wider than standard 244mm ATX boards. Combining this extra-wide motherboard with side-interface power supplies like the Corsair RM1000x Shift introduces cable routing complexities around motherboard tray rubber pass-through grommets and rear chamber cable clearance.
Specifications and Spatial Alignment Matrix
The table below breaks down the key dimensional specs governing E-ATX board installation and side-interface power supply routing.
| Component / Zone | Dimension Spec | Fitment & Routing Impact |
|---|---|---|
| GIGABYTE Z790 AORUS Master Board Width | 260.0 mm (E-ATX Form Factor) | 16.0 mm wider than standard 244.0 mm ATX |
| Motherboard Cable Grommet Overlap | 50% Grommet Coverage | Partial blockage of standard ATX pass-through ports |
| Corsair RM1000x Shift Modular Header Location | Side-Mounted (90-Degree Facing) | Requires 30.0 mm side clearance behind PSU shroud |
| 24-Pin ATX Power Connector Angle | Right-Angle (90-Degree Horizontal) | Requires clean tray recess to avoid cable binding |
E-ATX Board Width and Cable Grommet Overlap
Standard ATX motherboards measure 305mm x 244mm. The GIGABYTE Z790 AORUS Master extends to 305mm x 260mm. Installing this 260mm wide board into mid-tower cases designed primarily for standard ATX results in the right edge of the PCB overlapping the primary vertical rubber cable pass-through grommets by 16mm.
This overlap partially blocks the main 24-pin ATX power cable entry path. Fortunately, the Z790 AORUS Master features right-angled 90-degree main power and USB 3.0 headers along its right edge, allowing cables to plug horizontally into the PCB rather than protruding outward into the main chamber.
However, verifying chassis compatibility—such as reviewing Corsair 5000D Airflow E-ATX clearance—ensures the case features a removable cable shroud cover to accommodate 260mm E-ATX boards cleanly.
Side-Interface PSU Cables and Rear Chamber Clearance
Pairing an E-ATX system with side-interface power supplies like the Corsair RM1000x Shift shifts modular cable ports from the front end of the PSU to the side panel face. Evaluating Corsair RM1000x Shift side-interface case compatibility reveals that your chassis must provide at least 30mm of unobstructed side panel clearance behind the PSU chamber for cables to sweep cleanly upwards.
Key power and infrastructure requirements include:
- 12VHPWR Power Delivery: The RM1000x Shift includes native Type-5 12VHPWR 600W cables. Ensure proper bend radii when connecting high-end GPUs, checking RTX 4090 12VHPWR bend clearance (35mm minimum bend distance from plug face).
- Overclocked Power Headroom: The 20+1+2 phase 105A SPS VRM on the Z790 AORUS Master feeds heavy transient loads smoothly under sustained Intel Core i9-14900KS power draw stress, making 1000W ATX 3.0 power supplies essential.
- Dual 8-Pin EPS Power: Route top dual 8-pin EPS 12V cables through the upper-left cutouts before mounting top radiators.