SilentiumPC Grandis XE1236 – Test and Review

SilentiumPC Grandis XE1236 is the newest and actually the first CPU cooler in the portfolio of the relatively new Polish company SilentiumPC designed as a twin tower cooler structure to provide the best possible cooling performance and noise level balance. Grandis XE1236 itself is made to deliver very serious heat dissipation service and of course the XE Technology. And last but not least, let’s not forget a very good and stylish appearance.

I already have the cooler ready to be tested and reviewed and to be honest I am really excited to check what this product has to offer while cooling my AMD FX-8350 processor at default, a bit overclocked and a bit more overclocked frequencies.

But of course, let’s first pay some attention to the box.

 Front side of the box  Back side of the box
IMG_0101 IMG_0103


SilentiumPC Grandis XE1236 arrived to me for a test and review using my power hungry and very hot processor,  in a pretty big and very stylish looking carton box. The package itself is painted in white, grey and light blue colours featuring a big picture of the cooler itself on the front panel of the box, while the full technical specifications and some additional details regarding the product are located on all sides of the package. And I should say there is plenty of interesting information in several languages.

Let’s put the box aside and check what is placed inside of it.

After I opened the top cover of the box, the first thing to notice was the very detailed installation leaflet, of course typical for all manufacturers on the market, the white box holding all of the additional accessories, and right beneath it there was the cooler packed in a very solid plastic package and the additional fan placed inside a second white carton box. WOW, this product has a second white box!


As always, let’s start checking what is inside the white box made to deliver the additional accessories.



All of the additional accessories accompanying the cooler were delivered to me packed in separate nylon bags just to ensure that all of the parts will be in perfect condition and most of all in full quantity. After I took all of the additional accessories out of their packages and arranged them for making some shots, this is the view I got.


The standard SilentiumPC Grandis XE1236 accessories pack features:

  1. Solid metal back plate required for both Intel and AMD sockets
  2. 2 x long metal front brackets needed for installing the cooler on AMD sockets in horizontal position
  3. 2 x short metal front brackets needed for installing the cooler on AMD sockets in vertical position
  4. 2 x metal front brackets needed for installing the cooler on all Intel sockets in both horizontal and vertical positions
  5. 4 x additional metal clips for installing two additional 120mm fans
  6. A various set of bolts, screws and plastic washers needed for the AMD and Intel installations.
  7. A syringe of Pactum PT-1 thermal compound
  8. Y-pwm splitter for powering and regulating up to two fans.
  9. A metal wrench for fastening the nuts during the installation.
  10. Additional SilentiumPC GF12025 120mm fan
  11. Installation manual

In my experience and from what I saw previously with other CPU coolers of the brand, the additional accessories pack is rich enough to provide a lot of possibilities and to be compatible with all modern sockets and processors. Apart from that, all of the major installation accessories are actually made of solid metal, which will definitely deliver robust connection between the processor and the cooler and overall reliable cooling performance.

And it is time to make things more interesting and finally check the cooler’s structure.


SilentiumPC Grandis XE1236 HEAT SINK STRUCTURE

At first glance, SilentiumPC Grandis XE1236 offers a pretty standard for a twin tower cooler structure, featuring the three important components which I am going to check one by one in this review and they are: the heat sink formed as two thin and very stylish looking towers, the two 120mm fans doing the cooling magic and the most important one – the mounting kit.

As usual, let’s start with the heat sink.

SilentiumPC Grandis XE1236 offers a radiator structure made of copper/aluminum contact plate, 6 x Ø6mm copper heat pipes without direct contact with the processor, and of course aluminum fins grouped together forming the two-tower setup. The overall cooler dimensions are 130 x 105 x 158 mm and weight of 1160 g including the fans. Pretty serious dimensions, I should say.

First things first, so let’s start with the contact plate and the XE Technology.


SilentiumPC Grandis XE1236 features a perfectly milled contact surface designed according to the XE Technology and featuring two plates soldiered together and holding tight the copper heat-pipes for the best possible durability.

The top part is actually made of aluminum block, while the bottom part is made of a perfectly milled copper plate acting as a additional heat spreader that transfers the heat more efficiently from the CPU to all 6 x Ø6mm copper heat pipes symmetrically arranged according to the center of the contact plate and going through all of the aluminum fins on each tower.

The heat-pipes themselves are grouped in a very interesting way in 2 groups holding 3 pipes on the outer sides of each fin stack, which will deliver the best possible heat dissipation using the surface of the fins in the optimal way. The only thing that I would recommend for future models is to deliver heat pipes caps to improve the cooler’s appearance.


And since I started speaking about the fins, let’s pay some attention to the next part of the heatsink, which is actually the surface made for dispersing the heat – the fin stacks.

SilentiumPC Grandis XE1236 left side of the heat sink SilentiumPC Grandis XE1236 top/front side of the heat sink
IMG_0113 IMG_0118


SilentiumPC Grandis XE1236 offers an absolutely symmetrical  to the center of the contact plate and absolutely identical two towers with 46 x 1mm thick performance aluminum fins with 2mm fins gap. The top fin for both towers is 1mm think, entirely painted in black matte with the company logo to boost the overall appearance of the cooler.

Both of the fin stacks are not equipped with rubber dampers to reduce the vibrations of the fans, of course if there are any vibrations when the fans are installed and working.

The aluminum fin stacks, together with the heat pipes and the contact plate form a very massive and solid cooling radiator, which is capable of holding up to 3 x 120mm fans attached with metal fan clips for the best possible cooling performance.

And by saying fans, let’s talk about them.


The standard SilentiumPC Grandis XE1236 package includes two SilentiumPC GF12025 fans. Both of them have entirely painted in black matte 120 x 25mm square frames and painted in glossy black propellers with 7 very wide and not very sharply angled blades. The fans are designed to operate at 500 ~ 1500 +/-10% revolutions per minute range providing airflow level of 55.00 CFM at noise level range of 21dBA.

Before I continue with the tests, I will have to install the fans and prepare the cooler for installation on the motherboard.

To install the fans the only thing that I have to do is clip them to the two towers with the provided metal clips. Of course, the standard setup features 2 fans with 2 pairs of metal clips. Apart from that, the cooler is provided with a third pair of clips for installing a third fan.

And to be honest, 3 fans installed on this radiator will definitely deliver amazing performance but will block absolutely everything around the processor socket.

One fan installed Both fans installed
IMG_0122 IMG_0124


The power and the regulations of the fans is done by pretty long, entirely sleeved in black 4-pin PWM cables and connectors, and both of the fans should be connected directly to the motherboard CPU fan header using the provided in the package PWM Y-splitter, as you can see on the picture above.

All parts assembled together formed a very massive and very stylish CPU cooler which should require a very reliable and rigid mounting kit.

Of course, to test the cooler’s performance in real conditions I will have to install it on my motherboard with the provided mounting kit.

According to the official details provided on the company web page, the cooler uses the same backplate and is compatible with all modern sockets:

  1. Intel sockets:  LGA 775, LGA 1366, LGA 2011, LGA 1150, 1155, 1156
  2. AMD sockets: AM2(+), AMD AM3 (+), FM1, FM2, FM2+

Of course, for doing the tests I will use the AMD brackets and these are the parts needed so the cooler can be installed on the motherboard:


As always, the first thing to do is to get familiar with the installation manual, read the instructions carefully and pick up the right accessories for the actual socket… And later to prepare the mounting kit before attaching it to the motherboard.

For AMD sockets there are two ways to install the cooler.

The first way is to use the two shorter metal front plates which will deliver the option to install the cooler in vertical position or to use the 2 longer front plates, which will deliver the option to install the cooler in horizontal position. Of course, for my setup the best way is to install the cooler in vertical position for the best possible cooling performance.

All of the parts for the AMD socket Installed
IMG_0126 IMG_0128


Installing the mounting kit to the motherboard is actually a child play. Thank God I am still a kid, or at least this is the way I feel and it took me around a minute or less to install it to the motherboard. With the mounting kit installed it was time to apply some thermal compound, install the cooler and prepare if for the tests.

And this is what the cooler looks like installed on the motherboard:

Seen from the front
Seen from the side
IMG_0130 IMG_0133


As you can see from the pictures above, when the heatsink is installed on the motherboard it is not possible for memories with taller heat spreaders to be used. After all, this is a really massive cooler which when installed is above the RAM slots and most of the elements around the socket.

And this is what the cooler looks like installed on the motherboard and inside the case.


The cooler itself definitely covers all the components around the socket and it perfectly fits in with the black interior.


SilentiumPC Grandis XE1236  TESTS

Since the cooler is installed I believe it is time to check my testing rig and continue the article with the tests…

CPU: AMD Vishera FX-8350

  1. At standard frequency 4.020 MHz (at 1.368V)
  2. At low overclock frequency of 4.220 MHz  (at 1.392V)
  3. At medium overclock frequency of 4.420 MHz (at 1.428V)

Motherboard: GigaByte 990FXA-UD3

Video card: 2 x Gigabyte GV-R927XOC-2GD

Memory: 2 x 4GB Geil Black Dragon 1866 MHz

Hard drive: Kingston SSD SV100S264G

Hard drive:  WD Server Edition WD1002F9YZ 1TB

Case: SilverStone Raven RV-03

Power supply: Antec HCP-750W

Cooler: SilentiumPC Grandis XE1236

Thermal paste: Noctua NT-H1 thermal compound

For this test and review I am going to use the two standard SilentiumPC GF12025 fans working at full speed of around 1500 revolutions per minute, providing airflow level of 55CFM, at noise level of 21dBA in push-pull setup.

The tests will be conducted in a closed system with:

  1. 2 x SilverStone AP181 – 180mm fans on the bottom panel of the case putting fresh air in and spinning at about 1200 rpm
  2. 120mm fan behind the motherboard cooling the socket and spinning at about 1000 rpm.
  3. Room temperature of about 20 degrees.

Both SilverStone AP181 – 180mm fans were connected together to the chassis 1 connector and were rotating at maximum speed.

And here I want to describe my testing method.

I will install SilentiumPC Grandis XE1236 and do stress tests using Prime95 AVX software with constant load on the cooler for 14:30 minutes with custom settings of minimum FFT size (in K of 128), max FFT size (in K of 128) and Run FFTs in place at standard frequency of 4.020 GHz (at 1.368V), at low overclock frequency of 4.220 GHz (at 1.392V) and at medium overclock frequency of 4.420 GHz (at 1.428V) using the two fans working at full speed of 1500 revolutions per minute.

Now let’s check out the test results:

Grandis XE1236 1500rpm@4020MHz 1.368V Grandis XE1236 1500rpm@4220MHz 1.392V
SilentiumPC Grandix XE1236 1500@4020MHz 1.368V SilentiumPC Grandix XE1236 1500@4220MHz 1.392V
Grandis XE1236 1500rpm@4420MHz 1.428V
SilentiumPC Grandix XE1236 1500@4420MHz 1.428V


All of the test results have been summed up in the following charts:

Temp Results

And the fan speed during the tests:

RPM Results

With the test done and the results added to the article it is about time to share my thoughts regarding the product.


SilentiumPC Grandis XE1236 CONCLUSIONS

1. SilentiumPC Grandis XE1236 performance:

After I had some really nice time unpacking the SilentiumPC Grandis XE1236 and all of the pretty solid accessories, arranging them for taking some shots, installing the cooler on the motherboard and finally after I am done testing I can say that I am really impressed with the overall features and performance of the cooler.

As the first twin-tower cooler in the company portfolio, SilentiumPC Grandis XE1236 delivers pretty serious dimensions, very interesting and reliable contact plate structure, really solid installation, stylish appearance and most of all, serious cooling performance. And here I’d like to say: Good job, SilentiumPC!

The cooler itself is a massive structure made of copper and aluminum, made to deliver very good balance of cooling performance, while working at very low noise level, and it definitely does its job. According to what I saw during the tests, the cooler was working at somewhat higher temperatures because the fans were not able to deliver airflow and static level pressure which are strong enough, but they were pretty silent.

Moreover, after the tests the cooler was dropping the processor temperature pretty fast, which describes a very serious radiator heat conductivity. Something, which is very important.

After all of the tests I can say that this cooler will surely handle every processor working at standard or overclocked frequencies. Of course, for the ultimate performance 3rd SilentiumPC GF12025 fan will be required or a brand new set of faster, more powerful and much louder fans will be needed.

And since I started talking about the noise I want to share that throughout all of the tests, both of the fans were almost quiet. Yes, I was able to hear the noise from the air passing through the propellers but overall with my case closed the ambient noise level was pretty low.


2. SilentiumPC Grandis XE1236 appearance:

SilentiumPC Grandis XE1236 is made to deliver pretty serious performance and at the same time very stylish and clean design, which will definitely stay neutral when installed inside a modern middle or full ATX tower or a modding project with a black colour scheme. With its size the cooler somehow delivers the feeling of reliable performance and with the overall build quality, a long life span.

According to my review, I think that SilentiumPC Grandis XE1236 deserves the following reward:


Official price (MSRP) for SilentiumPC Grandis XE1236: 45€ incl. VAT

Official warranty: 24 months

I thank SilentiumPC for the test sample.


SilentiumPC Grandis XE1236 – Test and Review
9 Total Score
A very good performer made to deliver quiet operation and stylish appearance.

Noise Level
Additional accessories
User Rating: 4.13 (2 votes)

Dobrin Krastev is the owner, reviewer and newsman of with more than 15 years' experience in personal computers, server and storage systems, UPS, peripheral devices and software. Passionate about testing and reviewing, AMD overclocking using AM3 990FXA and AMD FM2 A85X test systems and building modding projects.
  1. Reply Hco 05.05.2015 at 22:13

    Excellent review again . I read with pleasure each review .Only the weight of cooler not like it.

    • Reply Dk_vr 06.05.2015 at 21:15

      Thanks for the good words.
      I really hope the reviews are useful to you and everybody who reads them.

      The good performing coolers are always heavy and massive and I should add for this one – silent.

  2. Reply Bosko 05.05.2015 at 21:58

    Glad to see they’ve improved the install kit in this cooler compared to the SilentumPC Fortis XE1226. But the fans could have been a bit stronger. Anyway the radiator is massive and well designed. Overall very good and sure the price will be good as SilentumPC delivers one of the best price/perf. ratio.

    • Reply Dk_vr 06.05.2015 at 21:17

      The mounting kit is just massive and very rigid. I am impressed of the overall build quality.
      And yes the fans could be a littler bit more powerful even a bit more loud.

      I can say this is one, if not the cheapest twin tower cooler, which I saw so far.

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