Thermal Performance

Test System

Test Methodology

A Xylem D5 pump, an Aquaero 6 XT controller, and an EK-Quantum Surface X360M radiator with Phanteks T30-120 fans help complete the loop. The GPU is not placed in the loop to make the only source of heat the CPU and, thus, the CPU block itself. Average flow rate is set to 1 GPM and calibrated in-line temperature sensors are used to measure the coolant's temperature. Everything required is placed inside an environmental chamber with the ambient temperature is set to 25 °C. Thermal paste cure time is taken into account and three separate mounts/runs are done for statistical accuracy, and to remove chances of any mounting-related anomalies. For each run, a custom Prime95 test with small FFTs and AVX2 load is used looping for 30 min, and CPU core temperatures are measured using AIDA64 with the average core temperature recorded at the end of each run. A delta T of CPU core and loop temperature is thus calculated for each run, with an average delta T that is then obtained across all three runs. This way, the cooling solution is taken out of the picture.

Test Results

Note that metal top blocks generally perform slightly better than the non-metal top blocks in my environmental chamber with active ventilation. There are some blocks here which are socket-specific—such as this EK-Quantum Magnitude—and others which offer more compatibility but also mean they are not designed to specifically perform as best as possible on the Intel LGA 1700 socket. These two factors add to the rest of the puzzle including the installation mechanism and how well of a fit is achieved with uniform mounting pressure across the entirety of the CPU here. The EK-Quantum Magnitude had high expectations set forth from its previous version with the metal top which was competing favorably against the Optimus Cooling Signature v2 as well as the Aqua Computer cuplex kryos NEXT. Those two blocks are clearly not present here but we do have two all-metal blocks from Alphacool and yet the Magnitude in its nickel/plexi variant here bests them too! Thus I imagine the all-metal version of the Magnitude would have performed even better.