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Cases    Cooler Master Cases

Cooler Master ATCS 840 Full Tower Classic Case - Black (RC-840-KKN1-GP)
Part #: cst-839
4 In Stock, Ships Today Till 6pm EST  
Price: $199.99
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Product Description   Features   Specifications   Reviews (1)    
The Cooler Master ATCS 840 Full Tower Classic Case constitutes a classic all-aluminum design that builds on the legacy of the original ATCS design. The aluminum construction not only allows for a lighter weight but complements the thermal design seamlessly with three 230mm fans, dedicated air duct for graphics card cooling and HDD cooling module for superb cooling.

Extra attention was paid to make sure this elegantly designed chassis is not only easy to install but easy to maintain. This includes: slide-out motherboard tray along with cut out CPU access for easy removal, tool-free HDD casing, patented finger pressing 5.25" drive.

Lastly, it gives users the freedom to choose any components they desire, as it supports the latest standards such as E-ATX and dual PSUs.

Download Manual


Select Your Options
Select an Optional Windowed Side Panel
 No Thanks!
 Factory Window PanelFactory Window Panel
The Cooler Master ATCS 840 Windowed Side Panel is the answer for your ATCS 840 chassis. Now you can swap the side panel for one with a window that is 15.5"+ in width and 11.5"+ in height! Show of your hardware with this replacement side panel. ($42.99)
 Custom Lag VersionCustom Lag Version
The CoolerMaster ATCS 840 Custom Bolt-On Full Window is designed to fit the Stacker ATCS 840 Cooler Master Case. This is a HUGE bolt-on full window that shows off every inch of your case with a slight bend to the front to keep your look fresh! ($99.99)
 Custom Full VersionCustom Full Version
The CoolerMaster ATCS 840 Custom Bolt-On Full Window is designed to fit the Stacker ATCS 840 Cooler Master Case. This is a HUGE bolt-on full window that shows off every inch of your case! ($99.99)


Select A Power Supply
 None
 Antec TruePower Quattro 850Antec TruePower Quattro 850
The Antec TruePower Quattro 850W ATX12V / EPS12V Power Supply is more compact than most competing power supplies of the same wattage yet ideally suited for handling the most demanding system specs. TruePower Quattro™ is 80PLUS® certified which means that Quattro™ consumes about 33% less energy than many equivalent power supplies with the same... ($169.99)
 Antec TruePower Quattro 1000Antec TruePower Quattro 1000
The Antec TruePower Quattro 1000W ATX12V / EPS12V Power Supply is more compact than most competing power supplies of the same wattage yet ideally suited for handling the most demanding system specs. TruePower Quattro™ is 80PLUS® certified which means that Quattro™ consumes about 33% less energy than many equivalent power supplies with the same pow... ($239.99)
 Aerocool Modular 550WAerocool Modular 550W
Aerocool blasts its way into the modular power supply market with an intelligent modular system that features many different connectors plastic UV reactive sleeving and a blue glowing 120mm fan! ($109.99)
 Corsair HX Series 1000W ModularCorsair HX Series 1000W Modular
The Corsair HX Series 1000W Modular Power Supply joins the family of well received HX Series Enthusiast Grade Power Supplies known for their rock solid stability enhanced modular cable design and high efficiency. The Corsair HX1000W Power Supply sets a new standard by which all other high wattage power supplies will be judged. The Corsair HX100... ($259.99)
 Corsair HX Series 620W ModularCorsair HX Series 620W Modular
From the manufacturer of the "World's Most Awarded Memory" comes the Corsair HX Series Power Supply. With that same legendary focus on the performance and reliability Corsair has engineered the HX Series to support even the most demanding of systems. The Corsair HX Series incorporates the most advanced technology to deliver reliable continuous a... ($166.99)
 Enermax Galaxy SLI 1000WEnermax Galaxy SLI 1000W
The Enermax Galaxy Modular PFC 1000w Quad SLI & Crossfire Ready Power Supply is rated at a staggering 1000 Watts the Enermax Galaxy is ready for the lastest hardware on the market. It features modular cables so you don't have any clutter in your case and has every safety feature one could need. ($299.99)
 PC Power & Cooling Quad SLI 750WPC Power & Cooling Quad SLI 750W
The PC Power & Cooling Silencer 750W QUAD SLI Ready Power Supply gives you legendary PC Power and Cooling performance and reliability along with a unique ultra-quiet cooling design and a price that seals the deal. ($159.99)
 PC Power & Cooling Turbo-Cool 860WPC Power & Cooling Turbo-Cool 860W
The PC Power & Cooling Turbo-Cool 860W Power Supply leads the industry in reliability with a 200000 hr MTBF. This is a professional industrial-grade Power Supply that fits normal ATX form factors. It uses heavy-duty capacitors inductors heat sinks and more. The unit also features external fine-tune voltage adjustment controls. With ultra hig... ($259.99)
 PC Power & Cooling 1200 ESAPC Power & Cooling 1200 ESA
The PC Power & Cooling Turbo-Cool 1200 ESA Certified 1200W Power Supply is the newest model in the renowned PC Power & Cooling Turbo-Cool series. The robust Turbo-Cool 1200 power supply is truly the ultimate next-gen PSU and is now equipped with ESA capabilities. This Single-Rail power house (+12V @ 90A) will provide optimum distribution of rock-s... ($499.99)
 SilverStone Zeus SLI 650WSilverStone Zeus SLI 650W
The SilverStone Zeus ST65ZF 650W SLi Ready Power Supply Unit has the highest rated output of any SilverStone power supply the Zeus ST65ZF series represents the pinnacle of PS2 (ATX) design. The SilverStone ST65ZF can deliver exceptionally stable continuous 650W (710W peak) output that is normally reserved for industrial server power supplies.... ($129.00)
 Silverstone Strider 1k ModularSilverstone Strider 1k Modular
The Silverstone Strider ST1000 1000W Modular Power Supply is another proud member of the Strider line. Being one of the first power supply lines at SilverStone the Strider Series has come a long way ever since the birth of ST360 first Strider power supply. Since then Striders has been carefully enhanced tweaked and made better by the enginee... ($249.95)
 SilverStone Zeus ST85ZF 850WSilverStone Zeus ST85ZF 850W
The SilverStone Zeus ST85ZF 850W Power Supply Unit provides 850W of continuous total power at 50ºC and 90V AC input. This enormously powerful power supoply unit is truly built for the future with the ability to output nearly 99% of its total capacity solely to the +12V rails alone (70A)! Enthusiasts can also rejoice in knowing that the Silv... ($249.00)
 Thermaltake 850W Toughpower ESAThermaltake 850W Toughpower ESA
The Thermaltake 850W ESA Certified Toughpower Crossfire / Quad SLI Ready Modular Power Supply features four independent 12volt rails. With two 8-pin and two 6-pin PCI-E connectors the unit is ready for all multiple video card systems. Toughpower lives up to its name this unit can power the most demanding hardware available! With ESA Certified... ($249.95)
 Ultra X3 850W ModularUltra X3 850W Modular
X3® Modular Power Supplies Ultra pulls out all of the stops for their latest power supply. By combining our "EE" (Energy Efficient) platform which converts as much as 85% of AC power into DC power during typical loads with a quiet 135MM ball bearing fan our patented modular interface and our Limited Lifetime Warranty Ultra clearly dominates th... ($229.99)


Select A Cold Cathode Kit
 Dual Blue Cold CathodeDual Blue Cold Cathode
12" ultra bright cold cathode tubes encased in its acrylic tube with ends sealed with rubber mounts for safety from breakage and aesthetics. Velcro Straps for mounting anywhere in your case. Low profile bulb fits almost anywhere. The inverter is covered with a blue plastic box for safety not painted black or plain like others. Female and Male Mol... ($9.99)
 Dual Green Cold CathodeDual Green Cold Cathode
12" ultra bright cold cathode tubes encased in its acrylic tube with ends sealed with rubber mounts for safety from breakage and aesthetics. Velcro Straps for mounting anywhere in your case. Low profile bulb fits almost anywhere. The inverter is covered with a blue plastic box for safety not painted black or plain like others. Female and Male Mole... ($9.99)
 Dual Red Cold CathodeDual Red Cold Cathode
12" ultra bright cold cathode tubes encased in its acrylic tube with ends sealed with rubber mounts for safety from breakage and aesthetics. Velcro Straps for mounting anywhere in your case. Low profile bulb fits almost anywhere. The inverter is covered with a blue plastic box for safety not painted black or plain like others. Female and Male Mol... ($9.99)
 Dual UV Cold CathodeDual UV Cold Cathode
12" ultra bright cold cathode tubes encased in its acrylic tube with ends sealed with rubber mounts for safety from breakage and aesthetics. Velcro Straps for mounting anywhere in your case. Low profile bulb fits almost anywhere. The inverter is covered with a blue plastic box for safety not painted black or plain like others. Female and Male Mol... ($9.99)
 Dual White Cold CathodeDual White Cold Cathode
12" ultra bright cold cathode tubes encased in its acrylic tube with ends sealed with rubber mounts for safety from breakage and aesthetics. Velcro Straps for mounting anywhere in your case. Low profile bulb fits almost anywhere. The inverter is covered with a blue plastic box for safety not painted black or plain like others. Female and Male Mol... ($9.99)


Professional Sound Dampening Installation
(Click To See Example)
 No
 YesYes
Special sound and vibration absorbtion matting from FrozenCPU.com designed to deaden noise from fans and drives. With enough matting to silence an entire Mid-tower ATX case this is a must have. Effectively deadening the noise and vibration of case fans High speed Hard drives and CD-R's. ($49.99)

Sleeve All Internal Case Cables!
Click To See Description & Example Photos
(PSU not included)
 No
 Yes (Select Sleeve Color Next) ($49.95)

Select Your Cable Sleeve Color
(Select Heatshrink Color Next)


Select Your Heatshrink Color
(Remember To Select 'Yes' For Sleeving)



Install Cold Cathode Switch On Side Panel
(Click To See Example)
 No
 Yes (Non-LED Rocker)Yes (Non-LED Rocker)
The Round Rocker Switch is a simple on/off rocker switch the same model that we use on our cold cathode kits. It is small enough to fit on a 3.5" drive bay covers. ($10.00)
 Yes (Blue LED Rocker)Yes (Blue LED Rocker)
These rocker switches have a blue LED installed that will lite up when switched to on. These can be used with our cold cathode kits or any other light kit. Also can be used to build a custom baybus to control your fans. ($12.50)
 Yes (Green LED Rocker)Yes (Green LED Rocker)
These rocker switches have a green LED installed that will lite up when switched to on. These can be used with our cold cathode kits or any other light kit. Also can be used to build a custom baybus to control your fans. ($12.50)
 Yes (Red LED Rocker)Yes (Red LED Rocker)
These rocker switches have a red LED installed that will lite up when switched to on. These can be used with our cold cathode kits or any other light kit. Also can be used to build a custom baybus to control your fans. ($12.50)
 Yes (Amber Full Lense LED)Yes (Amber Full Lense LED)
This round rocker switch is especially suited 12 Volt installations. It is the perfect choice for controlling cold cathodes case fans LED lighting and just about any other standard 12 Volt device your computer can use. This is an automotive grade rocker switch that meets industry standards. This round rocker switch features a full size clear... ($12.49)
 Yes (Blue Full Lense LED)Yes (Blue Full Lense LED)
This round rocker switch is especially suited 12 Volt installations. It is the perfect choice for controlling cold cathodes case fans LED lighting and just about any other standard 12 Volt device your computer can use. This is an automotive grade rocker switch that meets industry standards. This round rocker switch features a full size clear... ($12.49)
 Yes (Green Full Lense LED)Yes (Green Full Lense LED)
This round rocker switch is especially suited 12 Volt installations. It is the perfect choice for controlling cold cathodes case fans LED lighting and just about any other standard 12 Volt device your computer can use. This is an automotive grade rocker switch that meets industry standards. This round rocker switch features a full size clear... ($12.49)
 Yes (Red Full Lense LED)Yes (Red Full Lense LED)
This round rocker switch is especially suited 12 Volt installations. It is the perfect choice for controlling cold cathodes case fans LED lighting and just about any other standard 12 Volt device your computer can use. This is an automotive grade rocker switch that meets industry standards. This round rocker switch features a full size clear... ($12.49)

Install Front & Rear Anodized Case Handles
(Large Handle Example Image)
 None
 BlackBlack
Anodized aluminum case handles for your side panels for easy removal of your side panel or a carrying handle to lug your case around to LAN parties. Comes extra large metal washers for stability and strength. 4 inches from pole to pole. Fits any hand comfortably with plenty of room. Available in 6 colors. ($41.98)
 BlueBlue
Anodized aluminum case handles for your side panels for easy removal of your side panel or a carrying handle to lug your case around to LAN parties. Comes extra large metal washers for stability and strength. 4 inches from pole to pole. Fits any hand comfortably with plenty of room. Available in 6 colors. ($41.98)
 ChromeChrome
Anodized aluminum case handles for your side panels for easy removal of your side panel or a carrying handle to lug your case around to LAN parties. Comes extra large metal washers for stability and strength. 4 inches from pole to pole. Fits any hand comfortably with plenty of room. Available in 6 colors. ($41.98)
 RedRed
Anodized aluminum case handles for your side panels for easy removal of your side panel or a carrying handle to lug your case around to LAN parties. Comes extra large metal washers for stability and strength. 4 inches from pole to pole. Fits any hand comfortably with plenty of room. Available in 6 colors. ($41.98)
 Large Handles - BlackLarge Handles - Black
The Anodized Large Case Handles are design meets practicality making your computer into a unique carry case. These handles make it easier to transport your case around to any event. The handles are anodized aluminum designed to match your case color. Made from sturdy 3/4" thick solid aluminum these sturdy handles are optimally suited for LAN m... ($64.95)
 Large Handles - SilverLarge Handles - Silver
The Anodized Large Case Handles are design meets practicality making your computer into a unique carry case. These handles make it easier to transport your case around to any event. The handles are anodized aluminum designed to match your case color. Made from sturdy 3/4" thick solid aluminum these sturdy handles are optimally suited for LAN m... ($64.95)






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Organize Your Workstation!
 WireMate - BlackWireMate - Black
The patented radically simple "no more mess" cable and wire management solution for computer workstations entertainment centers and many other applications! Love your electronics equipment but frustrated with all those eyesore wires? Make cluttered and hazardous cords a thing of the past with this creative system. The WireMate easily organiz... ($17.99)

Add An Accessory For Cheap!
 Ratpadz GS Mouse PadRatpadz GS Mouse Pad
Looking at the RatpadzGS (GS = Gaming Surface) overall it looks the same as the old Ratpadz but it has been very much tweaked. The Ultraslick(tm) surface has been optimized for optical and ball mice and is slicker than ever. The RatpadzGS has been tested with every Logitech Microsoft and IBM retail mouse on the market that can be purchase. T... ($9.99)
 FrozenCPU Stress BallFrozenCPU Stress Ball
The FrozenCPU Stress Ball is squeezable durable stress ball. ($0.99)

Add A Can Of Fast Energy For Cheap!
 Bawls Guarana 16 oz. CanBawls Guarana 16 oz. Can
Note: Each single quantity equals one half of a can. Bawls the LANer's best friend. BAWLS Guarana is a high caffeine soft drink made from the guarana berry. Guarana is a natural source of caffeine found in the Amazonian rainforest and has a kick ass taste. Perfect for those all night LAN parties! Made from guarana a highly caffeinated be... ($2.49)
 Bawls Guarana Cherry 16 oz. CanBawls Guarana Cherry 16 oz. Can
Oh the glory! BAWLS has listened to your requests and has added a new flavor to the BAWLS GUARANA lineup. Smooth and refreshing BAWLS Guarana Cherry still packs a great guarana caffeine kick but has a hint of cherry to keep your taste buds bouncing! When chilled to perfection the white circles on the BAWLS Guarana Cherry become a cobalt blue. ... ($2.49)
 CocaineCocaine
The Cocaine 8.4 oz. Energy Drink Can has returned under a new label: "Insert Name Here:". This is the same drink that was loved and loathed - it debuted to much notoriety (and caused much anxiety in the FDA... society?...) and quickly became a media sensation. Undeniably the drink provides an impressive energy boost and has an interesting flav... ($1.99)
 Cocaine - MildCocaine - Mild
The Cocaine "Mild" 8.4 oz. Energy Drink Can has returned under a new similar taste. Now it carries the same kick as the original without the burn! The drink is 3 and half times as powerful as Red Bull® Energy drink with a Caffeine content of a staggering 280mg! Still packing this much caffeine a single can will pick you up faster than a fork lif... ($1.99)
 Jolt Cherry BombJolt Cherry Bomb
We have brought in the infamously hard to get Jolt Cola and all of the other Jolt beverages! Jolt was the first to focus on a high caffeine cola and they are still the best. Upgraded to the new and innovative Battery Bottle that not only holds a huge amount of fluid (23.5 FL.OZ) but even tells you how much is left! Plus it features a cool screw top... ($1.99)
 Jolt BlueJolt Blue
We have brought in the infamously hard to get Jolt Cola and all of the other Jolt beverages! Jolt was the first to focus on a high caffeine cola and they are still the best. Upgraded to the new and innovative Battery Bottle that not only holds a huge amount of fluid (23.5 FL.OZ) but even tells you how much is left! Plus it features a cool screw top... ($1.99)
 Jolt ColaJolt Cola
We have brought in the infamously hard to get Jolt Power Cola and all of the other Jolt beverages! Jolt was the first to focus on a high caffeine cola and they are still the best. Upgraded to the new and innovative Battery Bottle that not only holds a huge amount of fluid (23.5 FL.OZ) but even tells you how much is left! Plus it features a cool scr... ($1.99)
 Jolt UltraJolt Ultra
We have brought in the infamously hard to get Jolt Cola and all of the other Jolt beverages! Jolt was the first to focus on a high caffeine cola and they are still the best. Upgraded to the new and innovative Battery Bottle that not only holds a huge amount of fluid (23.5 FL.OZ) but even tells you how much is left! Plus it features a cool screw top... ($1.99)
 Jolt Orange BlastJolt Orange Blast
We have brought in the infamously hard to get Jolt Cola and all of the other Jolt beverages! Jolt was the first to focus on a high caffeine cola and they are still the best. Upgraded to the new and innovative Battery Bottle that not only holds a huge amount of fluid (23.5 FL.OZ) but even tells you how much is left! Plus it features a cool screw top... ($1.99)
 Jolt Wild GrapeJolt Wild Grape
We have brought in the infamously hard to get Jolt Cola and all of the other Jolt beverages! Jolt was the first to focus on a high caffeine cola and they are still the best. Upgraded to the new and innovative Battery Bottle that not only holds a huge amount of fluid (23.5 FL.OZ) but even tells you how much is left! Plus it features a cool screw top... ($1.99)
 Bawls G33K B33RBawls G33K B33R
The Bawls Guarana G33K B33R is the first-ever high caffeine root beer spiked with guarana! G33K B33R has a smooth refreshing root beer taste with enough guarana caffeine to make it as strong as a cup of coffee. It’s the perfect drink for any gamer techie student or root beer fan in need of tasty energy! Bawls named this new drink “G33K B33R”... ($1.99)
 Blood Energy PotionBlood Energy Potion
Synthetic blood substitute. The fruit punch flavor packs 4 hours of energy along with iron protein and electrolytes. Not only does Blood Energy Potion have a similar nutritional makeup to real blood but it has the same color look and consistency. Get real blood nutrients without that real blood taste! Re-sealable transfusion bag style pouch. C... ($4.99)
 Health Energy PotionHealth Energy Potion
With a mellow apple-cinnamon flavor and helpful herbs and vitamins like elderberry ginseng biotin and folate Health Energy Potion is sure to restore you after a battle or before another day of the cubicle grind. It offers a very similar energy effect to it's blue kin but with a more restorative curve. Health Energy Potion is the premium re... ($4.99)
 Mana Energy PotionMana Energy Potion
You know what this stuff is. With 160mg of caffeine and a good dose of vitamins Each 50mL Mana Potion will add +160 to your MP and keep you going through epic battles. This means you can either mana up your whole party or party up um your whole mana? 5-8 hours of smooth energy with a citrus taste and a 24-hour cool-down. Mana Energy Potion is... ($4.99)
 Pop-Top Can & Bottle OpenerPop-Top Can & Bottle Opener
The FrozenCPU Combination Pop-Top Can & Bottle Opener / Key Ring is a sturdy little key chain bottle opener that handles both glass bottles and pop-top cans. Made out of a strong plastic slip the metal blade under the edge of the metal bottle cap and yank up to open beer bottles. Alternately slide the long plastic tap under the metal pop-top ta... ($0.99)

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