Test System and 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 used for testing at stock is set to its 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 its 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's and AIDA64's CPU tests represent typical multi-threaded loads. Both offer consistent results, one a benchmarking application and the other a stability test. Both are run for 15 minutes before the highest 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

At idle, ID-Cooling's FI-REEX Deluxe does well enough. It manages to place toward the middle of the pack, which is far from terrible considering it ties over ten other coolers in the process.

Typical Load Temperatures

The FI-REEX Deluxe does well in the first load test where it manages to tie the Noctua NH-D15 at stock and falls just 2°C behind it with the CPU overclocked.


Firing up Aida64's CPU benchmark, which increases the load, the FI-REEX Deluxe falls back behind the NH-D15 by 1°C at stock and 3°C with the CPU overclocked.

Max Load Temperatures

Now for the torture test. Using Aida 64 to produce as much heat as possible by loading the CPU's FPU, we see ID-Cooling's cooler maintain the pattern seen in the previous test by falling 1°C behind the NH-D15 at stock and 3°C behind it with the CPU overclocked. Considering the FI-REEX Deluxe's slightly more compact dimensions, that's not a bad showing. In fact, it also compares favorably to the Phanteks PH-TC14PE, be quiet! Dark Rock Pro 3, and the CRYORIG R1 Universal.