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Product Name: AC4G : Thermo Electric Cooler
Product Description
Active Cool has developed the AC4G, the world\'s first smart thermo-electric
cooling and noise-reduction system for PC processors. AC4G is an entirely new
approach to cooling PC processors, which is poised to replace the standard heat
sink and fan technology in PCs.
Features:
- Unique, patent-pending microprocessor-driven thermo-electric technology
- Power cooling
- Quiet computing
- Cools Pentium 4 and AMD Athlon processors
- Installs in any PC in less than 90 seconds
How AC4G Works:
Active Cool\'s AC4G high-power thermo-electric cooling system for PC
processors consists of the Cooling Unit and the Power and Control Unit.
The Power and Control Unit is a PC card containing an AC/DC switching mode
power supply and a microprocessor controller. The power supply, which receives
AC input directly from the electric network (through a plug in the bracket of
the card), provides the power to the thermo-electric unit. The power supply is
controlled by the microprocessor.
The microprocessor controller receives input from the ambient temperature
sensor and the CPU temperature sensor. The microprocessor samples the
temperature more than 40 times per second, and adjusts the cooling power of the
thermo-electric unit and the speed of the CPU and case fans accordingly.
To reduce computer noise, the microprocessor normally runs the CPU and case
fans at 6 volts (½ power, drastic reduction in noise). When the temperature of
the ambient air rises, the microprocessor operates the PC case fans at higher
power until temperature is reduced. If the CPU temperature rises, the
microprocessor initiates a carefully orchestrated reaction. First, power is
increased to the (virtually noiseless) thermo-electric unit. If this is
insufficient, then additional power can be supplied both to the thermo-electric
unit and to the CPU fan. When the thermal load is reduced, the fans can return
to quiet operation. During short bursts of processor load, the fans are often
not needed.
Many motherboards issue warning messages if the CPU fan is not operating at
full speed; therefore, the AC4G sends a simulated fan pulse to the motherboard.
The microprocessor monitors the actual fan speed. If the fan stalls or fails,
the microprocessor stops the simulation pulse to the motherboard, so that the
user will receive the customary warning of fan failure.
AC4G is powered independently of the PC and does not use PC resources.
AC4G Intel P4 Specifications Copper Base Heatsink:
Technology : Unique, patent-pending thermo-electric cooling
for PC processors. Microprocessor-controlled in PCI form factor.
Performance:
Cooling :
| Thermal load |
INTEL P4
(2.4Ghz) |
INTEL P4
(2.53Ghz) |
INTEL P4
(3.06Ghz) |
| Maximum Thermal Power |
59.8 W |
61.5 W |
81.8 W |
| SiSoft Sandra CPU Benchmark |
32°C |
33°C |
45°C |
| CPU Burn In |
32°C |
33°C |
39°C |
| Intelmaxpower75% |
33°C |
34°C |
46°C |
| Typical* |
30°C |
31°C |
29°C |
* Typical indicates how the CPU performs under typical stress of Windows
applications (Office package and other more intense applications).
All tests were performed at room temperature of 25°C. Indicated software was run
for 20 minutes to create thermal load. Temperature for all Intel P4 processors
was measured with Intel Active Monitor software. A ThermalTake XaserII case with
front and rear 80x80x25 case fans was used in all tests. Test results may vary
depending on case design and air flow.
Noise level, CPU fan : 29 - 45 dBA, dependent on load,
<29 dBA in typical operation, dynamically controlled by microprocessor;
patent-pending noise reduction technology
Noise level, case fans: 3-step
microprocessor-controlled: 6, 8, 12 VDC, control according to PC ambient
temperature and CPU load, smart noise-reduction algorithms
Response time to CPU temperature change : <1 second
PCI Card:
Installation : Occupies one PCI slot
Input voltage : 85-265 VAC, 50-60 Hz, wide-range, automatic
Power consumption from mains : 72W Peak
Standards : UL, FCC, CE, VCCI
Sensors : On-board PC ambient temperature sensor, CPU
temperature sensor on Cooling Assembly
Dimensions : 191 mm × 116 mm × 22 mm
Cooling Assembly :
Heat sink : Copper Base
Cold plate : Aluminum
Fan : 12 VDC, 70 mm × 70 mm × 15 mm, 36 cfm, PWM controlled
by PCI card
Thermo-electric unit : AC4G, custom design
Weight : 540 gr
Company Details
Active Cool, located in Elad, Israel, develops solid-state high-power
cooling solutions for PC processors and other semiconductors. Active Cool has
developed the world's first solid-state thermo-electric quiet cooling solution
for PC... more
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