Power Supplies - Upgrading and Repairing PCs - page 865

of the power supply rotated for greater width but reduced depth, as shown in Figure 18.4 .
Figure 18.4. SFX/SFX12V rotated power supply with a recessed top-mounted 80mm fan.
A special low-profile version of SFX12V designed for a slim chassis is only 50mm tall with an
internal 40mm cooling fan, as shown in Figure 18.5 .
Figure 18.5. SFX/SFX12V low-profile power supply with internal 40mm fan.
Finally, a more recent variation on SFX is called the PS3 form factor , defined in Appendix E of the
SFX12V specification. Although defined as part of SFX12V, the PS3 form factor is actually a
shortened version of ATX12V and is generally used in systems with microATX chassis and
motherboards that require higher power output than the smaller SFX variants can supply (see Figure