The tested cooling systems were placed at the edge of the desk on a sheet of polyurethane foam. The noise meter was installed on a tripod and was always at a 150 mm distance from the cooler fan rotor. The noise level for each cooler was tested outside the system case when the only noise sources in the lab were the cooler and its fan. The noise level of each cooler was measured between 1:00 and 3:00 AM in a closed room about 20 m2 big using CENTER-321 electronic noise meter. The room temperature during our test session varied between 24.5-24.7☌. The ambient temperature was checked next to the system case with an electronic thermometer with 0.1 ☌ precision that allows hourly monitoring of the temperature changes over the past 6 hours. Moreover, we will also provide a table with the temperature readings for all cores including their average values. We took the maximum temperature of the hottest CPU core for the results charts. The stabilization period for the CPU temperature between the two test cycles was about 8-10 minutes. The CPU was loaded with two consecutive CST test runs with the settings as indicated above. The nominal processor Vcore was increased to 1.3875 V in the mainboard BIOS: We overclocked our six-core processor (with its default non-lapped heat-spreader) with the multiplier set at 25x and “Load-Line Calibration” (Level 2) enabled to 4.3 GHz.

Power supply: Xigmatek “No Rules Power” NRP-HC1501 1500 W (with a default 140 mm fan).

Control and monitoring panel: Zalman ZM-MFC2.

System case: Antec Twelve Hundred (front panel: three Noiseblocker NB-Multiframe S-Series MF12-S2 fans at 1020 RPM back panel: two Noiseblocker NB-BlackSilent PRO PL-1 fans at 1020 RPM top panel: standard 200 mm fan at 400 RPM).

Backup drive: Samsung Ecogreen F4 HD204UI (SATA-II, 2 TB, 5400 RPM, 32 MB, NCQ).Drive for programs and games: Western Digital VelociRaptor (300GB, SATA-II, 10000 RPM, 16MB cache, NCQ) inside Scythe Quiet Drive 3.5” HDD silencer and cooler.System drive: RAID-0 of 2 x Kingston V-series SNV425S2128GB SSD (SATA-II, 128 GB, MLC, Toshiba TC58NCF618G3T controller).Memory: DDR3 3 x 2 GB OCZ Platinum Low-Voltage Triple Channel (Spec: 1600MHz / 7-7-7-24 / 1.65 V).

Graphics card: Asus Radeon HD 6770 DirectCU Silent (EAH6770 DCSL/2DI/1GD5) GDDR5 128 bit, 850/4000 MHz (with a passive heatsink from the DeepCool V4000 VGA cooler).Processor: Intel Core i7-980X Extreme Edition, 3.33 GHz, 1.225 V, 6 x 256 KB L2, 12 MB 元 (Gulftown, B1).Mainboard: Gigabyte GA-X58A-OC (Intel X58 Express, LGA 1366, BIOS F5c from ).We performed all cooler tests inside a closed system case.

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