PC Power & Cooling Silencer 750w CrossFire Edition ATX PSU
Published: 28th August 2007 | Source: PC Power & Cooling | Price: £130 |Internal Components
In the past, many people have judged the quality of a PSU on its weight and size of internal components. However, with many manufacturers moving on to newer and more efficient ways of designing their PSU's, it has become increasingly obvious that this is no longer a reliable method for gauging a power supply's quality. By looking inside the S75CF we should be able to identifty some of the components used and get a good feel for the overall build quality of the unit.
However, problems occur with this design when the load exceeds 50%-60%. Because the 120mm fan consumes about 1.5” of vertical space inside the PSU, heat sinks, capacitors, and other components are about 30% smaller in height compared to a PSU with a rear-mounted fan. The smaller parts can handle less current, so the maximum power available with the 120mm design is limited. And, because the heat sinks have less surface area, more air flow is needed with this design to keep the thermal situation under control. With 80%-100% load, the 120’s fan speed can double and the noise level can jump by up to 20dB.
With this in mind, let's take a look at the specifications of the ADDA manufactured 80mm fan used inside the S75CF:
• Size (mm): 80x80x25
• Bearing: BALL
• Speed (RPM): 3900
• Airflow (CFM): 50.0
• Noise (dBA): 41.0
Cables & Connectors
In previous reviews, PC Power & Cooling units have never been short of cables or connectors. After all, there's litte use in having a 750w power supply if you cant connect it to all of the devices in your system. We already know that the S75CF has quad PCI-E connectors, but let's take a closer look at what else is included..
It's also good to see that PCP&C has professionally sleeved every cable right up to the first connector for better airflow and a tidier look. It would have been nice to see all cables fully sleeved up to the very end connector, but this would serve no purpose other than for cosmetic appeal.