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Case And Power

System Builder Marathon: The $5,000 Extreme PC
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Case: Cooler Master Cosmos S

As one of the few cases to support a large standard radiator, Cooler Master’s Cosmos S RC-1100 started getting attention from the System Builder Marathon (SBM) team even before it was featured in our June case roundup. Cooler Master’s legendary quality, along with thoughtful features such as a side-intake fan large enough to assist graphics, RAM, and chipset cooling also helped assure its place in today’s build

Read Customer Reviews of Cooler Master's Cosmos S


We’ll show additional case photos as we detail the assembly process, but a more comprehensive analysis can be found in its review.

Power: Cooler Master Real Power Pro 850 W

We know that at least two-thirds of our readers will be surprised or even appalled at the thought of a multi-rail 850 W unit powering a quad-SLI build, but better-informed readers will note that this is the same unit we’ve used to test even more power-hungry equipment in our most recent quad-SLI article.

Read Customer Reviews of Cooler Master's Real Power Pro 850 W


In fact, the Cooler Master RS-850-EMBA we placed in today’s build was pulled from a test bench where it had been used for over a year to test all types of hardware. It's one of approximately eight units used by editors all over the world as part of Tom’s Hardware’s most-recent reference system and none of these editors have reported a single problem with their sample.

Multiple 12 V rail designs often suffer from load imbalances when two high-current devices share a single low-amperage rail, but Cooler Master designed its RS-850-EMBA to counter that problem by giving the ATX 12 V/EPS 12 V connectors and each PCI Express (PCIe) connector its own rail. This feature gives the RS-850-EMBA the safety factor of multi-rail output with most of the added stability that normally requires a single-rail design.

Each SBM PC is supposed to use new parts specifically selected to match its hardware profile, so why did we recycle this item? Unfortunately, a higher-rated part, one respected by most of the same readers who will question this one, failed due to a defect.

The change in power supply dropped our total system cost by around $100.

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