Test System & Temperature Results

Test System

Testing Procedure

All testing is done at a room temperature of 23°C (73°F) with a 1°C margin of error. The coolers are tested with Turbo, EIST, and C1E enabled, which will allow the CPU to clock down to a low 1.6 GHz while idle, or clock up to proper speeds under stock and overclocked conditions. The retail Intel Core i7-4770K I use for testing at stock is set to load-optimized defaults with the CPU's voltage at a static 1.15 V. Overclocked, the processor is running at 4.2 GHz on the CPU and 3.9 GHz on cache, with respective voltages set to 1.20 V and 1.15 V. During all these tests, fans are set to run at 100% in the BIOS, with temperatures being recorded by AIDA64.

The idle test will consist of the CPU sitting idle at the desktop for 15 minutes. This will allow for a stable temperature reading that will be recorded at the end of those 15 minutes.

Wprime and AIDA64's CPU-stability test represent typical multi-threaded loads. Both offer consistent results with one being a benchmarking application and the other a stability test. Both are run for 15 minutes before the peak reading during the test is recorded and taken as the result. This test lets enthusiasts know what temperatures they can expect to see with games and applications. Wprime is set to eight threads while AIDA64 is configured to stress the CPU, FPU, cache, and system memory.

AIDA64 offers maximum heat generation when set to stress just the FPU in the stability test, which will really push the CPU. This test represents extreme loads much like LinX, Prime95, and other extreme stress tests many users are familiar with.

Idle Temperatures

With the CPU at Idle, the Raijintek Ereboss does fairly well. It's not topping the charts but is certainly not sitting on the bottom either.

Typical Load Temperatures

In Wprime, the Ereboss CPU cooler puts up some nice numbers considering its price. It takes on the much more expensive Noctua NH-U12S while also besting similarly priced coolers, like the Silverstone Argon AR03 and NZXT Respire T40.


In the AIDA64 system stability test, the Ereboss maintains its edge over the more expensive Noctua cooler at stock. When overclocked, however, the Ereboss falls back a spot, still managing to best the similarly priced Argon AR03. Overall, the Ereboss is performing exceptionally well for its price here.

Max Load Temperatures

When pushed to the limit with AIDA64's FPU-only test, the Ereboss proves it can easily handle cooling the Intel Haswell Core i7-4770K. At stock, it compares favorably to the Noctua NH-U12S once again and continues to beat its nearest-priced competitor, the Silverstone Argon AR03, at stock.Temperatures skyrocket into the 90°C range once the system has been overclocked, but the Ereboss, sitting at 91°C, ties the Noctua and Silverstone coolers, once again landing smack in the middle of my charts. The Raijintek Ereboss has proven to be a damn good CPU cooler for its price thus far.