PC Power & Cooling Silencer 750w CrossFire Edition ATX PSU
Published: 28th August 2007 | Source: PC Power & Cooling | Price: £130 |Introduction
Back in May of this year Overclock3D were one of the first to bring you the news of PC Power & Cooling's acquisition by enthusiast orientated memory manufacturer OCZ Technologies. This monumental joining of forces vastly extended PCP&C's global reach, allowing them to distribute their high-end power supply's the world over using OCZ's well established networks. In addition to this, the once premium price tag of PCP&C's quality PSU lineup took a cut in order to bring them head-to-head with the competition - making a lot of PC enthusiasts very, very happy.
Taking a few steps back in time, Overclock3D first got a chance to sample the quality of PCP&C in May 2006 when we reviewed their Turbo-Cool TC1KW 1000w unit. Walking away with our highly regarded 'Editors Choice' award and let down only by it's price tag, the review simply reinforced the common knowledge that "you get what you pay for". Just four months later PCP&C released a slightly tamer version of the TC1KW in the form of the S75EPS 750w Silencer unit. Once again the power supply sailed through our testing, nabbing yet another 'Editors Choice' award.
Almost a year down the line (and no doubt with OCZ's influence), PCP&C have added yet another 750w Silencer unit to their portfolio aptly named the S75CF. Essentially an updated version of the S75EPS, the S75CF features connectors for the latest graphics cards, the same build quality as its elder brothers and an even cooler paintjob!
Anyway, enough of my ramblings. For the benefit of those who have yet to be acquainted with PC Power & Cooling, here's a brief history lesson from their website:
In 1986, the company introduced its Silencer 150 and Turbo-Cool 200, the industry's first ultra-quiet and high-performance power supplies. Other high-end products followed, the reviews were great, and the company continued to grow. In 1991, the company moved to a modern facility in Carlsbad, CA.
Over the last 22 years, PC Power & Cooling has produced many innovative products including: the first CPU cooler, the first PC heat alarm, the first independently-regulated PC power supply, the first redundant power system, the first NVIDIA-certified SLI supply, the first One Kilowatt computer power supply, and the first power supply with its own certified test report (Turbo-Cool 1KW).
PC Power & Cooling have always been extremely open when it comes to revealing the specifications of their PSU's. The information available on their website and in their specification PDF's is a refreshing change to the tactics of some companies who, for some reason, want to keep this information from the public eye. The following information shown below can all be found here and here.
• 750W Continuous @ 40C (825W Peak)
• Up to 90% (10dB) Less Noise per Watt
• ATI CrossFire Certified (HD 2900XT)
• High Efficiency (83%); .99 Active PFC
• +12VDC @ 60A (Powerful Single Rail)
• Rock-Solid, Super-Clean DC Output
• 24-pin, 8-pin, 4-pin M/B Connectors
• Quad PCI-E and 15 Drive Connectors
• Automatic Fan Speed Control Circuit
• 3-Year Warranty and Tech Support
With many manufacturers designing PSU's containing six or more +12v rails, you may find it strange why PC Power & Cooling have never really embraced this idea - instead sticking to single, double or triple rail designs. However, there is a method to their madness and it ensures that no matter what hardware configuration you have, as long as the total current draw on the +12v rail is below 60amps, your system will not be starved of juice.
For example: Take a ~700w PSU that is designed with three +12v rails. The power distribution between those rails is likely to be around 28amps per +12v rail with a maximum draw of 60a across all three rails. If any one of these rails exceeds its 28amp rated output the PSU will trip OCP (Over Current Protection) and power off. This is obviously not a problem for single rail PSU's as all of their power is available to all devices on a single rail.
It's good to see that PCP&C have managed to fit the S75CF into a relatively standard sized ATX housing, maximising its compatibility with smaller PC cases. We can also see the reasoning behind the S75CF's "Quad" naming: A total of 4x PCI-E connectors are provided - two of which can be used with the latest 8-Pin PCI-E powered graphics cards.