MCX478-V™ heatsink for Intel® Pentium® 4 processors (socket 478) DISCONTINUED Made in the USA  U.S. patent 6,469,898 Introduction: Following the September release of the MCX462-V™ model, which defined an entirely new class of high-performance, low noise heatsinks, we are now proud to introduce the MCX478-V™ for Intel® Pentium® 4 processors. With equal size and pin design to the MCX462-V™, the MCX478-V™ performance and usage specifications are identical to its AMD® counterpart: Optimized performance characteristics at the lowest possible audible noise levels. Plug-and-play installation with Intel's stock retention mechanisms. Features highlights Hybrid copper base, thin aluminum pin heatsink: the massive 1/2" thick copper base provides superior heat capacity for unparalleled stability in extreme overclocking applications. 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 dbA. The MCX478-V™ is optimized to work with 80 and 92mm fans and ships with brackets for both. One can appreciate the size of the heatsink once a 92mm fan is installed, as shown below. Since the heatsink fits entirely within Intel® stock retention frame, it is fully compatible with all Intel® compliant motherboards. Quick and easy fan installation: the fan installs "in a snap" with convenient snap-in rivets. 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 MCX478-V™ heatsink fits into Intel's stock retention frame, and does not require removal of the motherboard. Tension onto the processor is provided by two spring clips. Processor Compatibility: All Intel® Pentium® 4 processors (socket 478 form factor). Motherboard compatibility: All (see note 1) Intel® compliant motherboards socket 478 form factor. Back to top Performance data Suggested fans. Because this product is intended to cover the widest possible variety of uses, from virtually silent operations all the way to extreme overclocking, it is sold without fan. We have extensively tested a large number of fans in our labs. Below is a list of the select few that were found to perform best with the MCX462-V™ heatsink. Since the performance specifications of the MCX462-V™ and the MCX478-V™ are identical, please use the list below as a guideline to procure a fan appropriate to your application. This list is intended to be updated as we receive more fans from the manufacturers for testing. For user convenience, we will from now on 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 dbA: For non-overclocked processors. The MCX478-V™ surpasses all known temperature specifications published by Intel® to this date. Medium noise operations: 28 dbA to 40 dbA - 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 dbA 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 dbA Heatsink-fan °C/Watts ratio (*) Vantec 92x25 SF9225L 28 20 0.333 Mechatronics 92x25 E9225S12B 29 24 0.307 Sunon 80x25 KD1208PTB4 25 23.4 0.307 NMB 80X25 3110NL-04W-B20 26.5 22.5 .291 Medium noise category - Lower C/W is better Brand Part # CFM dbA Heatsink-fan °C/Watts ratio (*) Sanyo Denki 92x32 109P0912H201 55.1 36 0.220 Delta 80x25 AFB0812HH 37.4 34 0.226 High noise category - Lower C/W is better Brand Part # CFM dbA Heatsink-fan °C/Watts ratio (*) Vantec 92x38 TD9238A 119 56.4 0.149 Vantec 80x38 TD8038H 84.1 55.2 0.145 * 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. Back to top Specifications  heatsink CNC machined, C110 copper base, 3"W x 3.3"L x .500"H, flatness better than 0.0003", micro surface finish 8 or better. 374 Helicoid Pins made of High Thermal Conductivity Aluminum Alloy, press fitted in the base. Heatsink base dimensions 3"x3.3"x1.66" Heatsink top dimension 3 3/4" x 3 1/2" Weight: 22 oz (620g) 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 Mounting Hardware MSRP in US$ Motherboard retention Fan hardware for 80 & 92mm fans MCX478-V™ No Yes Yes $51.50 Back to top

Note 1: Information provided at the time of publication, and subject to change without notice.