MCX64-V™ heatsink for AMD® Athlon™ 64 and Opteron™ processors Made in the USA  U.S. patent 6,469,898 Introduction: The MCX64-V™ follows the high performance-low noise tradition of our "V" series heatsinks, and is designed to operate with AMD® Athlon™ 64 and Opteron™ (socket 754, 939 & 940) processors. This model is specifically designed to comply with AMD® mechanical specifications, while surpassing the thermal and acoustical requirements. The MCX64-V™ is primarily intended for OEM's, system integrators, and users who desire to keep their cooling solution in strict conformance with AMD® specifications, while offering top notch cooling performance at low audible noise levels. Features highlights Hybrid copper base, thin aluminum pin heatsink: the 3/8" thick copper base provides excellent heat capacity and lateral heat dispersion. The thin aluminum pins promote increased turbulence for more efficient heat dissipation compared to traditional fin extrusions. Patented Helicoid pin design (U.S. Patent 6,469,898): pins are individually machined in an helicoid shape, to increase their surface area, and further enhance heat dissipation efficiency. Several patents pending for concentrically aligned rows of pins, bent at multiple angles. The spacing and angles between the concentric rows has been precisely calculated to optimize cooling and reduce noise at air flow levels as low as 22 CFM and 23 dB-A. The MCX64-V™ ships equipped with an 80x25mm fan chosen to do better than AMD® 's lowest recommended audible noise levels, while maintaining compliance with the specified thermal resistance See fan specifications here Exceptional quality and attention to details: the heatsink base is lapped to 0.0003" (3/10 of 1/1000"), and polished to near-mirror finish to promote optimum thermal conductivity. Users are advised that while flatness is strictly respected for providing the most significant benefit to thermal interface, surface polish is a cosmetic component and may vary slightly from one heatsink to another. Re-lapping or polishing the heatsink base is never recommended. Back to top Motherboard and CPU compatibility The MCX64-V™ is compatible with all known Athlon™ 64 and Opteron™ motherboards at the time of this release.   Back to top Retention Mechanism The MCX64-V™ is designed to be used with AMD® recommended retention frame and backing plate. The spring loaded mechanism provides a safe and effective attachment method to the motherboard, and complies with AMD®'s static and dynamic load specifications.   Because a majority of motherboard manufacturers already include the retention frame and backing plate with their offerings, and in an effort to spare this cost to the majority of users, Swiftech does not include these items with the MCX64-V™ heatsink. These items are nonetheless offered as an option under part # AJ00172, as shown below. Part # AJ00172 complete retention frame & backing plate Users are advised to inspect the backing plate shipped with their motherboard, and to note that a metallic backing-plate featuring threaded standoffs is required. An example is shown below, and is available under part # AJ00264. Part # AJ00264 backing plate alone Back to top Performance data Comparative fan data We have extensively tested a large number of fans in our labs. Below is comparative data showing the performance of our heatsink with the factory-bundled fan, versus a selection of a few fans that were found to perform well with the MCX64-V™ heatsink. For user convenience, we separate all our bench tests into 3 distinct categories characterized by the fan's audible noise level: Silent to low noise operations 22 to 26 dB-A: For non-overclocked processors. The MCX64-V™surpasses all known temperature specifications published by AMD® to this date. Medium noise operations: 28 dB-A to 40 dB-A - From mild to serious overclocking levels depending on the fan selected, or high temperature environments. Up to 100 Watts processor load. High noise operations: 40 dB-A and up - From serious to extreme overclocking depending on the fan selected, up to 130 Watts processor load. Silent to low noise category - Lower C/W is better Brand Size (mm) Part # CFM dB-A Heatsink-fan °C/Watts ratio (*) MCX64-V original factory fan 80x25 AFB0812M 31.4 28 .272 NMB 80X25 3110NL-04W-B20 26.5 22.5 .321 Medium noise category - Lower C/W is better Brand Part # CFM dB-A Heatsink-fan °C/Watts ratio (*) Delta 80x25 AFB0812HH 37.4 34 .249 High noise category - Lower C/W is better Brand Part # CFM dB-A Heatsink-fan °C/Watts ratio (*) Vantec 80x38 TD8038H 84.1 55.2 .173 Delta 80x38 FFB0812SHE 68.5 48.5 .182 * C/Ws shown are the heat sink to air values, excluding thermal resistance of the TIM joint, which will vary depending on the thermal interface used and bench test conditions. For reference, Swiftech's TIM joint bench test value is 0.09°C/W. All tests are performed in an environmental chamber using Industry standard procedures, and calibrated equipment. Comparative Data to the MCX6400-V™ The graph below compares the thermal resistance of the MCX64-V™ and the MCX6400-V™. The C/Ws shown are the heat sink to air values, excluding the thermal resistance of the TIM joint; which will vary depending on the thermal interface used and bench test conditions. For reference, Swiftech's TIM joint bench test value is 0.09°C/W. All tests are performed in an environmental chamber using standard procedures and calibrated equipment. The ‘rated’ airflow is based on the fan manufacturer’s data and is not correct in terms of the actual airflow through the heatsink. But as the same fans were used for both tests their relative performance can be easily compared with accuracy. Click on picture to enlarge Back to top Specifications  Heatsink CNC machined, C110 copper base, flatness better than 0.0003", micro surface finish 8 or better. 360 Helicoid Pins made of High Thermal Conductivity Aluminum Alloy, press fitted in the base. Weight: 15.5 oz (440 g) with fan Fan Manufacturer: Delta Bearing type: dual Ball Bearing Features: RPM sensor Part # Voltage (V) Operating Range (V) Rated current (mA) Speed (RPM) Max. Air Flow (CFM) Noise (dB-A) AFB0812M-F00 12 7.0 to 13.8 0.12 2700 31.4 28.0 Back to top Suggested Retail Pricing Please consult your Swiftech distributor prior to ordering direct from us, or purchase the product factory direct here MODEL Factory bundled-FAN & guard Mounting Hardware MSRP in US$ Motherboard Retention frame & backing plate Fan hardware for 80mm fans MCX64-V™ Yes No Yes $59.00 Accessories & Replacement parts Part # Description MSRP AJ00172 Retention frame and backing Plate $4.67 Fanbckt90 Set of 4 Fan brackets to install 92mm fan $3.25 Back to top