At the top of R4 are the front panel controls. Available are the following:
• Headphone/microphone jack
• Reset button
• Power button
• 2x USB 3.0 ports (via internal motherboard header)
• 2x USB 2.0 ports
Front panel connectivity include dual USB 3.0 ports
Further back – along the top are dual honeycomb mesh sections that allow for dual 120/140mm cooling fans to be installed. R4 also supports 240mm water-cooling radiators which are less than 3cm thick.
Dual 120/140mm cooling fans can be installed at top
On the underside of R4 there are 4x rubber feet to prevent the case from slipping on smooth surfaces. Fractal Design have given R4 a large dust filter covering the PSU region and the optional bottom fan mount - this filter can be removed without having the case on its side.
The underside of R4 with large dust filter
