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Test Settings

CoolIT Vs. Cogage: Little Water And Big Air Compared
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We overclocked our C0-stepping Core i7 920 to 3.80 GHz in order to assure a high thermal load with both high-performance cooling solutions, using a 200 MHz base clock and 19x core multiplier.

Test System Configuration
CPU

Intel Core i7 920 (2.66 GHz, 8.0 MB Cache)
Overclocked to 3.80 GHz (19x 200 MHz), 1.366V

CPU Cooler, Air

Cogage True Spirit at continuous 12V
120 mm fan, 1,600 RPM

CPU Cooler, Liquid

CoolIT Domino A.L.C. at continuous 12V
120 mm fan, 600-2,800 RPM

Motherboard

Asus P6T Rev. 1.01G, BIOS 0306 (02-03-2009)
LGA-1366, X58/ICH10R

RAM

Kingston KHX16000D3ULT1K3/6GX (6.0 GB)
DDR3-2000 at DDR3-1600 CAS 8-8-8-24

Graphics

Zotac GeForce GTX260² 896MB
576/999MHz GPU/Shader, GDDR3-2484

Hard Drives

WD VelociRaptor WD30000HLFS
0.3 TB, 10,000 RPM, 16 MB Cache

Sound

Integrated HD Audio

Network

Integrated Gigabit Networking

Power

Cooler Master RS850-EMBA
850W, ATX12V v2.2, EPS12V

Optical

Lite-On LH-20A1L, 20X DVD±R

Software

OS

Microsoft Windows Vista Ultimate x64 SP1

Graphics

Nvidia GeForce 182.08

Chipset

Intel INF 9.1.0.1007

 
A 1.366 volt output under full load (1.344 volt idle) resulted from setting our Asus P6T motherboard to 1.350V core with Load-Line Calibration enabled.

The increased voltage kept our CPU stable at 3.80 GHz throughout its 8-thread Prime 95 64-bit torture test, while pushing temperatures on these high-capacity coolers beyond 75 degrees Celsius.

Benchmark Configuration
Prime95 v.25.8

64-bit executable, Small FFT's, 8-threads

RealTemp 2.70

Highest core reading at full CPU load (60 minutes)
Highest core reading at 30 minutes idle

Acu-Rite Thermal Probe

IOH/VRM Heat Pipe temperature at northbridge junction
Ambient temperature at 6" from motherboard front edge

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