Deep Cool Gammaxx S40 Review

red454 - 2013-11-17 18:53:10 in CPU Cooling
Category: CPU Cooling
Reviewed by: red454   
Reviewed on: December 23, 2013
Price: $30

Deep Cool Gammaxx S40 Introduction:

Deep Cool was started in 1996 and provided desktop and server coolers for ODM (Original Design Manufacturer) partners. The company has a nice line of CPU, notebook, hard drive, and server coolers; as well as individual fans and even a new line of computer cases. With its focus on customer service and satisfaction, Deep Cool is a leader in the cooling market.

Air coolers come in many shapes and sizes. One problem with large air coolers is their size and weight. Add a fan or two and you now have a good portion of your motherboard covered, including the RAM slots. And hanging on your motherboard is all the weight of the cooler and fans. If you forget to plug in the CPU power or the fan, or forget to install your RAM, well, you may have to remove the cooler to gain access to these components. So you can see what a smaller, compact cooler can bring to the table. The Deep Cool Gammaxx S40 is a small cooler with four Φ6mm heat pipes and a single 120mm PWM fan. The size is nice, but let's see how well it can keep your CPU cool.

Deep Cool Gammaxx S40 Closer Look:

The box has a glossy finish and carries a light blue and white color scheme. The front shows the front of the cooler with a quick overview of the socket coverage and features. The back of the box shows the back of the cooler and a close up of the contact surface of the heat pipes. The right side of the box shows the specifications in thirteen languages. The left side of the box shows the socket coverage in more detail and diagrams of the overall dimensions.

















Opening the box, you are greeted by the top of the cooler, which is protected with a clear plastic nest, and the hardware box fit nicely next to it. The fan is captured against the hardware box to protect it. Everything slides out of the box with little effort and I noticed that the bottom of the cooler also has a clear plastic nest and that the thermal paste is already applied. As such, I decided to leave the bottom nest on for the rest of the pictures. The packaging seems adequate and nothing is damaged, so let's look at the hardware.




The box contents include hardware to mount the S40 on to all the current sockets from Intel and AMD, including Socket 2011. Is that all there is in the box? Yes. As I mentioned earlier, the thermal paste comes pre-applied, but where is the mounting base for the rear of the motherboard? Well, there isn't one. The Gammaxx S40 uses the standard factory mounting provisions for Intel and AMD sockets. This means that for Intel, the S40 uses stock-style push pins that lock into the existing holes in the motherboard, while for AMD you use the factory-style tab and latch (included) on the existing socket base. The Intel Socket 2011 also uses the stock tapped holes in the factory base. The S40 is light enough to get by without needing a heavy supplemental base that installs behind the motherboard. This is good news if your case doesn't have a cutout for access to the rear of the motherboard and should make for a faster installation.

The instruction set is printed on both sides and includes easy-to-follow graphics for Intel and AMD installations. There is also a warranty card and quality control inspection certificate.


Deep Cool Gammaxx S40 Closer Look:

The S40 looks like any other aluminum finned cooler, except for the fan. That is what caught my attention first. While it is a 120mm fan, the frame is quite different than what you typically see. Instead of the usual square frame of the standard case fan, it is round and shaped like a cone, or like a funnel to focus and guide the air into the fin stack. I like the idea of the round frame, but it looks like there are some areas of the fin stack, particularly at the corners, that won't see much air flow. We will see if it actually has any effect on cooling.






















After I removed the fan from the heat sink, you can see that the four U-shaped heat pipes appear to be close together - maybe too close. The pipes at the front will get the coolest air first, while the ones toward the back will see warmer air. Hopefully it won't have a negative effect on the cooling capacity.



The top view of the tower shows the termination points for the four nickel-plated, copper heat pipes. Deep Cool's logo and name are embossed top and center. There are rectangular holes in two rows along the edge above the logo, presumably to aid with air flow vertically through the stack. There are notches on the sides for fan clips for the front and back of the cooler, which to me would indicate that a second fan can be added, although it would require a different clip style (maybe custom made) to use a standard 120mm fan. The machined heat pipes show their copper cores beneath the pre-applied thermal paste. I usually like to apply my own paste, but having it already applied does save some time.



The base has some low profile grooves to help dissipate heat. On either side of the base are two threaded holes to attach the included Intel and AMD brackets that ultimately hold the cooler to your motherboard. Since this will be installed on an Intel Socket 1150, I have attached the push pin mounting brackets to the base.



Deep Cool's 4-pin PWM fan has nine smooth blades and is mounted in a round frame with a rubber pad at each of the four corners to keep vibrations from being transferred to the fin stack. The fan is retained to the fin stack with two metal clips and the holes to which the clips attach.



Installation of the Gammaxx S40 was rather easy, especially when you consider that the entire installation process can be done without needing access to the rear of the motherboard. While I am not a big fan of the Intel push pin method (which we all know from the stock coolers), it does hold the Gammaxx S40 firmly in place. These push pins are a little cumbersome at first, but they pop in and twist to lock the cooler in place.

Side to side, there is clearance between the RAM modules and the S40 fan, but very little. You can use all four slots, and even tall modules will fit (as long as the heat sinks are not too wide), but they will stick up into the intake air path of the fan. My Patriot Viper modules are not huge, but they do stick up into the air path about a half inch. Not a lot, but this is something to consider if your heat sinks are tall. Mounting to an Intel LGA 2011 or AMD socket also does not require a back plate and is slightly different in that the installation utilizes parts of the existing socket mounting package to complete the installation on these platforms.



Notice the absence of a rear mounting base; just the push pins poking through. Leftover from previous testing, you can see the outline of the rubber pads from other cooler bases on the back of the MSI motherboard. Of course, when you install the Gammaxx S40, you probably won't be seeing this view.

Deep Cool Gammaxx S40 Specifications:

Gammaxx S40
Intel LGA  2011/1366/1155/1156/1150/1150/775
AMD FM2/FM1/AM3+/AM3/AM2+/AM2/940/939/754
Heatsink Dimension
143H*120W*81.3L mm
Heatsink Material
Aluminum Fins
Copper Heatpipes
Φ6mm x 4 pcs
Fan Dimension
120 x 120 x 25 mm(L xW x H)
Fan quantity
1 pcs
Fan Speed
Rated Voltage
Start Voltage
Rated Current
Power Input
Air Flow
54.25 CFM
Air Pressure
17.8~ 26.1 dBA
Life time/Fan Life time
Fan control
pin connect
Cooling Power
610 g


Deep Cool Gammaxx S40 Features:


All information Courtesy of Deep Cool @ http://

Deep Cool Gammaxx S40 Testing:

Testing of the Deep Cool Gammaxx S40 will be accomplished by installing the cooler into the test system case, rather than a test bench. Most systems are built and mounted into a (relatively) sealed chassis, so this method will be used to generate the idle and load results to give a real world view as to the cooling performance one can expect, based on the test system listed below. Of course, your results may vary by several degrees due to case design and ambient air temperature. The CPU load is generated by Prime 95 version 27.9 for a period of two hours, with a cooldown period of one hour after the computer has returned to an idle state. Real Temp 3.70 is used to log the temperatures with the highest and lowest averages across the four cores of the Core i7 4770K test CPU. Ambient temperatures are kept at 24 °C during the testing to minimize the effect of temperature variations. Each cooler is tested with the manufacturer-supplied thermal compound as delivered.

Testing Setup:


Comparison Coolers:




At idle, the Gammaxx S40 was able to keep my CPU at 28 °C stock and 32 °C overclocked, which is close to the middle of the comparison field. That field contains coolers much larger and more expensive than the S40. Now when you get to the load results, the S40 stays toward the middle of the pack at 72 °C at stock speeds, but shoots up to a whopping 98 °C when overclocked. This is a little disappointing since that is not much better than stock. A few questions come to mind: Is the fan too small? Too slow? Would a standard 120mm case fan be better? And how about the heat pipe orientation - would temps be better if they were not lined up so close together? 

The Gammaxx S40 is just fine for normal use, but things get a little toasty when we crank things up. The advantage that the S40 gives us in access to RAM slots may come at the expense of cooling capacity.  Regarding fan noise, I expect a little noise when the cooler is running at full speed, but the S40 was quiet, even with the side of the case opened up.

Deep Cool Gammaxx S40 Conclusion:

The Deep Cool Gammaxx is light weight and easy to install. After you install the S40, you can still get to the various sockets and connectors on your motherboard, and particularly the RAM, which is of course, a big plus. Larger coolers may have high end cooling capacity, but the compromise is that you often lose easy access to your componets. The S40 uses a unique round-frame, 120mm PWM fan and while it looks nice, I am not certain that it can move enough air.

Cooling performance for non-overclocking was toward the middle of the field of test units, but when you stress the system with a mild overclock, the S40 knocks on the 100 °C door, and that is a door we try to stay away from. Two things that I think would help the S40 would be a larger fan with a higher speed to move more air, like a standard square case fan, and for Deep Cool to move the heat pipes away from each other (space them out) to give each pipe better access to a clean stream of cool air.

All that being said, the Gammaxx S40 is a budget cooler and is not likely targeted at systems that are regularly pushed to the thermal limits. So with that in mind, if you don't overclock or push your CPU with a heavy workload for long periods of time, then the S40 does a decent job of keeping your CPU cool.

The fit and finish are top-notch, and the installation is clean and easy. For the average user, the S40 delivers good, quiet cooling performance and won't put a dent in your wallet.