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Compatible CPU:

VIA & INTEL Processor
(Socket 370)

Celeron Pentium III VIA C3
Silent Mode 1300RPM All Speeds
Normal Mode 2500RPM All Speeds
AMD Processor
(Socket 462)
Duron Athlon
Athlon XP
Athlon XP
Athlon XP
Silent Mode 1300RPM All Speeds Up to 2700+ Up to 2800+
Normal Mode 2500RPM All Speeds
  • FHS
Dimensions 95~110 (L) X 63 (W) X 65 (H) mm
Weight 462g
Base Material Pure Copper
Dissipation Area 2600 ~ 2900 cm2
Thermal Resistance Silent Mode 0.31 ”ĘC/W Normal Mode 0.23 ”ĘC/W
Speed Silent Mode 1300 RPM ”¾ 10% Normal Mode 2500 RPM ”¾ 10%
Noise Level Silent Mode 20.0dB Normal Mode 32.0dB
Bearing Type 2-Ball
  • Fan Speed Controller
Dimensions 65 (L) X 23 (W) X 21 (H) mm
Weight 20g
Output Voltage 5V ~ 11V ”¾ 2%
Allowable Wattage 6W or lower
  1. Zalman's CPU Coolers do not generate noise and vibration in Silent Mode.
  2. The heat dissipating material of the Flower HeatSink (FHS) is Pure Copper.
  3. Separation of the FHS from the CPU fan prevents transfer of the fan's vibration to the CPU.
  4. By utilizing a 92mm fan, both the CPU and the motherboard chipset are cooled.
  5. The cooling fan can be mounted at any desired location, making it compatible with virtually all computer cases and motherboards.
    (Note: computer cases that have the power supply covering the CPU can not be used)
  6. With the included adjustable fan speed connector, the user can freely adjust the CPU fan's RPM.
  7. CPU can be cooled to a temperature sufficiently below the temperature required by the CPU manufacturer in Silent Mode.

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  1. Heatsink Assembly: ZM6558BC-Cu
  2. NP FAN & Bracket: FB123
  3. Thermal Grease
  4. Screw bolts (Inch-sized/mm-sized bolts)
  5. Clip
  6. Fan Speed Controller (FAN MATE 1)
  7. Heatsink Installation Tool (Clip Mate)
Please Keep in Mind in Building a Noiseless Computer:
  1. For a noiseless computer, a Noise Prevention (NP) Power Supply, a NP HDD, a NP CD-ROM and a NP VGA Card should be used together with this cooler.
  2. Zalman affixes a Computer Noise Prevention System (CNPS) Mark to each of its parts and components used for noiseless computers.
  3. For a high-performance NP VGA Card, it is preferable to use a VGA FHS.
  4. When buying a new VGA Card, it is recommended to buy a VGA Card without a fan.
Patent Applications:
  1. Korean Patent Application No. 01-11056
  2. Patent pending in over 20 nations around the world, including USA, EU, and Japan
  1. If you try OVERCLOCKING, please make sure that the fan is in Normal Mode.
  2. Zalman Tech. Co., Ltd. is not responsible for any damage to a system or a CPU caused by CPU OVERCLOCKING.
  3. The maximum weight for a heatsink is specified as 180g by Intel CPU(Socket 370) and as 300g by AMD(Socket 462). Should a heatsink which exceeds the relevant weight limit be installed in a computer, special care should be taken when the computer is moved.
  4. Zalman Tech Co., Ltd. is not responsible for any damage to a system or a CPU occurring when moving a computer with an overweight heatsink.
  5. The specifications of any product may change without prior notice to improve the performance thereof.