Today we will be reviewing the Cooler Master ATCS 840. I'm sure you've heard of Cooler Master, right? Let's review just in case:

Cooler Master was founded with the mission of providing the industry's best thermal solutions. Since its establishment a decade ago, the company has remained faithful to this mission, emerging as a world leader in products and services for companies dealing with devices where heat issues must be resolved.

In pursuing this mission, Cooler Master is absolutely committed to delivering solutions that precisely meet customer requirements for features, performance, and quality. Moreover, we strive to be a reliable long-term partner for our customers that they can truly depend on. It aims to be the first and foremost name that comes to mind for companies around the world seeking thermal solutions, and seeks to build such a reputation through outstanding technology, sophisticated design, and superior service.

Cooler Master's current business encompasses a comprehensive lineup of thermal solutions for a full range of applications. Its products range from heat sinks and fans to component housing, chassis, and ducting for computers, industrial machinery, telecommunications equipment, and many other devices.

Now that we've gotten to know Cooler Master better, let's jump in on some numbers:

• Model: RC-840-KKN1-GP (black) or RC-840-SSN1-GP (silver)
• Available Color: Black, Silver
• Dimension: (W) 9.57 x (H) 22.83 x (D) 24.80 inches
• Weight: Net Weight: 13.25 kg (29.21 lbs); Gross Weight: 15.75 kg ( 34.72 lbs)
• Motherboards: Micro-ATX / ATX / E-ATX
• 5.25" Drive Bay: 6 Exposed (without the use of exposed 3.5" drive bay)
• 3.5" Drive Bay: 6 Hidden, 1 Exposed (converted from one 5.25" drive bay)
• I/O Panel: USB x 4, IEEE 1394a x 1, eSATA x 1, Mic x 1, Audio x 1
• Expansion Slots: 7
• Cooling System:

  Front: 230 x 30 mm standard fan x 1, 700 RPM, 19 dBA (included)
  Top: 230 x 30mm standard fan x 2, 700 RPM, 19dBA (included)
  Rear: 120 x 25mm standard fan x 1, 1200 RPM, 17 dBA (included)
  Bottom: 120mm (optional)
  HDD Module: 120mm fan x 2 (optional)
  External Air Duct: 120mm fan x 1 (optional)

• Power Supply: Dual Standard ATX PS2 / EPS 12V (optional)
• UPC Code: 884102002458 (black), 884102002441 (silver)

Spotlight

• Elegant extruded aluminum bezel with CM nameplate
• Concealable I/O panel with brushed plate
• PCI-Slot meshed brackets for extra ventilation
• Meshed ventilation hole to provide a passive cooling
• Meshed top panel design for maximum ventilation
• PSU can be mounted on the top or bottom for a dual PSU system
• Removable HDD racks with anti-vibration pads for easy assembly and reduced noise
• Retaining holes for best cable routing and neatness
• Meshed top panel design for maximum ventilation
• Removable Motherboard tray sliding on the ball bearing drawer

Cooling System

• Dual 230mm top fans provide for improved exhaust airflow
• Dual or triple 120mm radiator can be mounted inside the top of the casing (radiator is optional)
• HDD module with dual 120mm LED to enhance internal airflow
• Independent air intake designed for bottom-mounted PSU
• Extra-added 120mm fan can be installed on the bottom pull cool air from the bottom of the case
• External air duct to upgrade cooling for your graphics cards