Raijintek Themis Evo CPU Cooler Review
Here at pcG we’ve adopted the Raijintek Themis as our default CPU Cooler of choice for our Test Rig. I’ve now been provided with what looks like the big brother of the original Themis the Raijintek Themis Evo. This cooler offers an additional heat-pipe, and deeper cooling stack, but still offers a similar height and width giving dimensions which are 122x82x165 mm compared to the Themis at 122x50x158 mm and a weight of a hefty 614g (without fan) compared to the smaller Themis at 448g (without fan).
The cooler comes with a single fan (but can have a second fitted), and installs in exactly the same way as the original Themis.
The front of the Raijintek Themis Evo box shows a nice image of the fully assembled cooler and provides the Raijintek homepage URL. The back of the box provides three further images of the cooler showing the rubberised fan mountings, the cooler stack (sans fan) and the fully constructed cooler (including fan) along with the info and support email addresses and the Raijintek homepage URL.
The left and right sides of the Raijintek Themis Evo box provide some key info on the cooler. The left side provides the cooler specifications (listed later in this review), the right side provides yet another angled view of the fully assembled cooler along with the key features listed below:
At the time of writing the Raijintek Themis Evo CPU Cooler is available from Overclockers UK at £27 or Amazon for £32. We were unable at the time of review to ascertain the warranty period offered by Raijintek, but it assumed to be 1 year.
courtesy of Raijintek
|Product Name||THEMIS Evo|
|Dimension [WxDxH]||122x82x165 mm|
|Weight||614 g [Heat Sink Only]|
|Thermal Resistance||0.11 °C/W|
Opening the box allows me to get a first view of the Themis Evo and the size increase over the Themis is immediately evident. The heatsink itself is stylish and seems well made, with the customary Themis cutouts down the front and the back of the single stack. No evidence of an offset stack here like there was on the Scythe Mugen Max I reviewed a little while ago. Which could result in taller memory modules being fouled by the fan.
The top view of the Themis Evo really shows off those stylish cutouts along with the tops of the 4 heat-pipes, also evident are the mounting holes for the Anti-Vibration rubber fan mounts. It’s evident that a second fan can be mounted on the heatsink (or the fan can be mounted on the back of the heatsink rather than the front) as there is a second set off mounting holes on the back of the stack.
The bottom of the heatsink gives a view of the CPU contact surface, and here you can see the copper of the heat-pipes embedded within the baseplate. Otherwise nothing major of note can be seen.
From the side that lack of an offset stack can be clearly seen, a shame this as I really think this could cause memory installation problems should your modules be tall. The stack consists of 54 fins 82mm deep and looks to provide a fair bit of cooling power. The front view shows the width of the stack which is inline with the original Themis at 122mm.
I decided to take some comparison shots of the Themis and the Themis Evo next to each other to give some indication of the scale of this cooler. As you can see the width and height dimensions are very close to each other (the width is the same in fact) but the real cooling benefit will come from that deeper stack. Comparison figures for the two coolers are 122x50x158 mm for the Original Themis compared to 122x82x165 mm for the Themis Evo, weight wise the Themis Evo comes in quite a bit heavier at 614 g [Heat Sink Only] compared to the Themis at 448 g [Heat Sink Only].
Overall the Raijintek Themis Evo looks like a larger version of our tried and tested Themis and looks just as easy to fit too. The extra depth should, I hope, help with cooling and I am interested to see how this cooler performs. I am also interested to see how the extra stack depth along with that non-offset stack impacts on my memory module slots!
|Case||Cooler Master HAF XB||Power Supply||Corsair Professional Series AX 760i|
|Motherboard||ASRock Fatal1ty Z97X Killer||CPU||Intel Core i5-4690K|
|CPU Cooler||Raijintek Themis Evo||RAM||HyperX Savage 2400MHz 8GB Kit|
|Graphics Card||XFX AMD Radeon R9 290X DD Black Edition||SSD||HyperX FURY 120GB|
Installing the Raijintek Themis Evo is a simple task and is easy to achieve if the instructions are followed. There are two sets of mounting plates, one for INTEL and one for AMD processors, and it is very easy to get the parts together for your installation by checking the part text (the INTEL plates are marked “INTEL” and the AMD plates are marked “AMD”)
There is a very detailed step by step guide to installing the Raijintek Themis in pcG James review. If you want more details than I give here, head over to his review, as the installation process for both the Themis Evo and the Themis are identical.
First step is installing the backplate. This involves making sure the backplate is the right way round (look for the two holes at one end matching the two screws holding the CPU socket on the motherboard), and feeding the four longer hex head bolts through the backplate and then the motherboard. The backplate is then secured in place by screwing the plastic threaded nuts onto the bolts, once in place some of the top of the bolt thread will still be visible.
Onto these bolts are then placed the relevant mounting plates (in our case the ones marked “INTEL”) these are mounted with the raised lip edge AWAY from the socket. Care is needed here to get these plates as straight as possible as the plates have a slotted hole for the bolts to pass through and can be mounted non-straight. The plates are held in place with metal nuts that are screwed onto the remaining thread of the bolt. I generally install the plates, add the nuts and then before really tightening them up adjust the plate to a straight position and holding it there as I tighten the first nut. Once tight the plate stays put as the second nut is tightened.
Once the plates are in place we are ready to add some thermal compound to the CPU, we use Arctic Cooling MX-4 here at pcG and the application is done by placing a pea sized blob of compound in the middle of the CPU and allowing it to spread out as the heatsink is lowered (and tightened) down onto the CPU.
Mount the crossbar into the bottom of the Heatsink (there are little recesses to keep the crossbar in place) and carefully lower the heatsink onto the CPU looking to make sure that the holes in the crossbar line up with the threaded holes in the mounting plates. Once in place add the final two bolts and gradually screw them in, alternating between them to keep the pressure even on each side as the cooler is screwed down.
Once in place push the rubber mounts into the holes on the top and bottom of the heatsink, and then pull the mounts through the fan holes until the “hooks” engage and hold the fan in place. And that’s it! Probably a twenty minute job if that!
A point to note here, those rubber mounts are great for vibration control but can be a pain to remove if you want to get the fan off of the heatsink. You have to either pull the fan off the “hooks”, or slide the rubber mounts up out of the holes in the heatsink. Having removed the fan on the Raijintek Themis a fair few times now, I can testify that you have to be REALLY careful NOT to bend the upper fins if you decide to pull the mounts out of the heatsink. You also can’t very easily get to the bottom ones to remove them from the heatsink, whilst the fan is installed and are pretty much forced to just pull on the bottom of the fan until the rubber hooks let go. A small issue, but an issue all the same.
After installation it became apparent that my initial worries over the positioning of the stack were well founded. I noticed that with the fan installed on the stack, my first two memory module slots were totally covered. Now, for the memory we have installed, that isn’t a problem, but if you had some Crucial Ballistix Tactical Tracer modules you’d be in trouble.
So now it’s installed, let’s see how this cooler performs in our Test Rig!
|For CPU Cooler testing, we here at pcGameware run Prime95 for a 15 minute period. During this period the temperature is monitored with CoreTemp and the cooling performance recorded (the max recorded is the average for all cores). Between each stress test we allow a 15 minute cool-down to allow for more accurate results. To adjust the fan speed we simply use the UEFI. A close eye is also kept on the ambient temperature, with the maximum being recorded for each run, this allows us to calculate the Delta temperature (Core – Ambient = Delta). Each run was performed with the Intel Core i5-4690K CPU at the following frequencies: 3.5GHz (Stock) and 4.0GHz (using the ASROCK OC Tweaker, shown in the picture below), all results have been recorded with CPU-Z.|
* Please note: To ascertain the maximum and minimum noise levels produced by our CPU test coolers. The dB is recorded at a distance of 1 metre from the cooler, with all case fans unplugged to isolate the sound in question.
Processor speed is set using the OC Tweaker tab of the UEFI, “Disabled” for stock speeds (3.5GHz) and “Turbo 4.0GHz” for the minor overclock tests. It should be noted that changing the OC settings resets the Fan Speeds, so these are checked on the next reboot and reset to “Full Speed” (see below).
All the fans installed in the system are set to 100% speed using the displayed settings, this is simple with the ASROCK UEFI with the option of “Full Speed” being available for all system fans (bar the Power Supply Fan header).
As stated above, to make our performance tests easier to follow and to get the most accurate recordings, all of the following tests have been carried out with case fans set at 100% and the Raijintek Themis Evo fan also set at 100%.
- Intel Core i5-4690K – 3.5GHz (stock)
|CPU Cooler||Fan Speed||Ambient Temperature||Max CPU Temperature (core average)||Delta Temperature||Noise Level|
|Scythe Mugen Max||100%||22.00||47.00||25.00||36dB|
|Raijintek Themis Evo||100%||21.50||47.50||26.00||37dB|
|SilverStone Argon AR06||100%||23.50||79.50||56.00||28dB|
The Raijintek Themis Evo provided very good cooling at our stock clock speed of 3.5GHz, keeping temps well within reasonable figures with an average CPU core temperature of 47.50C and a Delta of 26.00C. In fact as the Delta temperatures show, the results of my test put the Themis Evo into second place just below the Scythe Mugen Max which is in fact a larger cooler running a larger 140mm fan! This bodes very well for the 4.0GHz test.
- Intel Core i5-4690K – 4.0GHz (OC Tweaker)
|CPU Cooler||Fan Speed||Ambient Temperature||Max CPU Temperature (core average)||Delta Temperature||Noise Level|
|Scythe Mugen Max||100%||22.00||55.75||33.75||36dB|
|Raijintek Themis Evo||100%||21.50||58.00||36.50||37dB|
|SilverStone Argon AR06||100%||23.50||92.50||69.00||28dB|
I introduced a relatively small overclock using the ASROCK OC Tweaker within the UEFI, setting the i5-4690K to 4.0GHz and things start to warm up. I see an almost immediate move of core temperatures towards the 60.00C mark, but the Raijintek Themis Evo steps up and cools everything down, producing an average core temperature of 58.00C after the 15 minute Prime95 run. This produced a Delta of 36.50C which again held it’s second place spot in our CPU Cooler test table. Very impressive!
The Raijintek Themis Evo produced a noise level of 37dB in my acoustics test when running at full speed and in fact appears to be about right when you compare it to the CPU Coolers above and below it in the results table. The Scythe Mugen Max runs a larger fan at slightly lower speeds, so would be expected to not produce quite so much noise at full RPM, the Noctua NH-U9S runs quite a bit smaller fan, but at a whopping 2000 RPM, and these two coolers sit one dB above and one dB below our figure. Certainly the noise wasn’t obtrusive at full speed, and consider that most wouldn’t be running their CPU fans at full RPM anyway.
I was very interested to see how the Raijintek Themis Evo performed, being the bigger brother to our standard build Raijintek Themis, and had high expectations having seen the size of the heatsink when it came out of the box. These expectations were met when the cooler performed fantastically producing some nice lower Deltas during testing.
I’ve always quite liked the styling of the Themis range of coolers. The cutouts on the heat stack are a nice touch and the fan mounting system provides some nice vibration isolation in way of the rubber mounts. They can be fiddly to install (and remove), but they do their job well and keep the noise levels down by isolating vibration.
Installation is incredibly easy, with some very simple parts to put together. The instructions I found very easy to use and the cooler was installed easily and securely.
From a design point of view the Raijintek Themis Evo falls down in a couple of places. The over hanging the memory module slots issue, although not impacting our test rig build, could very well cause issues in other rigs and an offset stack would have helped to resolve that issue, along with those fan mounts that of course are great for reducing noise, but a nightmare to get the fan off of, should you want to take it out.
Thermal performance was in a way what I was expecting from a cooler of this size, not to say that is wasn’t impressive, but maybe I have learnt to expect good results from the Raijintek range of coolers. The results put the Raijintek Themis Evo in second spot on our leaderboard only just pipped to the post by a cooler that is in fact bigger and runs a larger fan! Excellent performance from the Raijintek Themis Evo!
Price wise the I think the Raijintek Themis Evo is fantastic value for money at approx £30, especially when compared to the aforementioned Scythe Mugen Max at a lofty £45-50! This is a lot of cooler for your money. Well done Raijintek! Another great cooler!
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Many thanks to Raijintek for providing this sample for review