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      As heat sink manufacturer, we have lots of reasons you choose us, not only we can reduce cost for you,      but also we can help you to finish total production chain service, contain: heat sink design, test, prodution, packing, shipping,etc.    Besides, please note the below important information:    If you are aluminum extrusion heat sink manufacturers, why choose us?      We specialize producing heat sink for 14 years, why choose us, you can know more us      by the below item.      1.we have mature supply chain management, contains the below item:        1)Strong material suppliers, we can meet the max aluminum extrusion width                                              700mm,tall and thick aluminum extrusion material       2.In our factory, we can do the below production process:        1)making mold,cutting,CNC,drilling,chamfer,polishing,brush,drying,packing.      3.Except aluminum extrusion heat sink, we can also do the cold froging heat sink.      4.We have strong surface treatment suppliers and strategic cooperation, so we can                            control the surface treatment cost for you.         

Dear buyer, Many thanks for your selecting Ruiquan Hardware.About the trial order qty, we have no special request, you can select 100PCS, 200PCS, 300PCS.According to your real situation, you can send your order to us, we will try our best to offer sevice for you.We offer the different style heat sinks, contains:aluminum extrusion heat sink, cold forging heat sink,aluminum housing,CNC products,ect.If you have any aluminum projects, you can send your inquiry to my e-mail box:rq4@dgruiquan.com.Welcome to visit our factory in your free time.

Dear buyer, Many thanks for your selecting Ruiquan Hardware.About the trial order qty, we have no special request, you can select 100PCS, 200PCS, 300PCS.According to your real situation, you can send your order to us, we will try our best to offer sevice for you.We offer the different style heat sinks, contains:aluminum extrusion heat sink, cold forging heat sink,aluminum housing,CNC products,ect.If you have any aluminum projects, you can send your inquiry to my e-mail box:rq4@dgruiquan.com.Welcome to visit our factory in your free time.

A heat sink is a passive heat exchanger that transfers the heat generated by an electronic or a mechanical device to a fluid medium, often air or a liquid coolant, where it is dissipated away from the device, thereby allowing regulation of the device's temperature at optimal levels. In computers, heat sinks are used to cool central processing units or graphics processors. Heat sinks are used with high-power semiconductor devices such as power transistors and optoelectronics such as lasers and light emitting diodes (LEDs), where the heat dissipation ability of the component itself is insufficient to moderate its temperature.A heat sink is designed to maximize its surface area in contact with the cooling medium surrounding it, such as the air. Air velocity, choice of material, protrusion design and surface treatment are factors that affect the performance of a heat sink. Heat sink attachment methods and thermal interface materials also affect the die temperature of the integrated circuit. Thermal adhesive or thermal grease improve the heat sink's performance by filling air gaps between the heat sink and the heat spreader on the device. A heat sink is usually made out of copper and/or aluminium. Copper is used because it has many desirable properties for thermally efficient and durable heat exchangers. First and foremost, copper is an excellent conductor of heat. This means that copper's high thermal conductivity allows heat to pass through it quickly. Aluminum is used in applications where weight is a big concern.

A heat sink is a passive heat exchanger that transfers the heat generated by an electronic or a mechanical device to a fluid medium, often air or a liquid coolant, where it is dissipated away from the device, thereby allowing regulation of the device's temperature at optimal levels. In computers, heat sinks are used to cool central processing units or graphics processors. Heat sinks are used with high-power semiconductor devices such as power transistors and optoelectronics such as lasers and light emitting diodes (LEDs), where the heat dissipation ability of the component itself is insufficient to moderate its temperature.A heat sink is designed to maximize its surface area in contact with the cooling medium surrounding it, such as the air. Air velocity, choice of material, protrusion design and surface treatment are factors that affect the performance of a heat sink. Heat sink attachment methods and thermal interface materials also affect the die temperature of the integrated circuit. Thermal adhesive or thermal grease improve the heat sink's performance by filling air gaps between the heat sink and the heat spreader on the device. A heat sink is usually made out of copper and/or aluminium. Copper is used because it has many desirable properties for thermally efficient and durable heat exchangers. First and foremost, copper is an excellent conductor of heat. This means that copper's high thermal conductivity allows heat to pass through it quickly. Aluminum is used in applications where weight is a big concern.

Wecan ship to virtually any address in the world. Note that there arerestrictions on some products, and some products cannot be shipped to certaininternational destinations.When you place anorder, we will estimate shipping and delivery dates for you based on theavailability of your items and the shipping options you choose. Depending onthe shipping provider you choose, shipping date estimates may appear on theshipping quotes page.Please also note thatthe shipping rates for many items we sell are weight-based. The weight of anysuch item can be found on its detail page. To reflect the policies of theshipping companies we use, all weights will be rounded up to the next fullpound.

Wecan ship to virtually any address in the world. Note that there arerestrictions on some products, and some products cannot be shipped to certaininternational destinations.When you place anorder, we will estimate shipping and delivery dates for you based on theavailability of your items and the shipping options you choose. Depending onthe shipping provider you choose, shipping date estimates may appear on theshipping quotes page.Please also note thatthe shipping rates for many items we sell are weight-based. The weight of anysuch item can be found on its detail page. To reflect the policies of theshipping companies we use, all weights will be rounded up to the next fullpound.

If you did not receive a quote for UPS,FedEx or USPS shipping, it is most likely due to the total weight of your orderexceeding the carrier's weight limits.  If this happens, and you do nothave a UPS or FedEx account number, please contact us for a quote for shipping. Also, check your address, an incorrect zip code will result in USPS, UPSand FedEx not being able to calculate your shipping.

If you would like us to use yourshipping account (UPS, FedEx or DHL) account to ship your order, please choosethe "ship using my own carrier account" shipping option duringcheckout.  Prior to completing your order, you can leave your carrierinformation in the Order Comments/Instructions field.  You may also sendus a contact form with this information.

Becausewe custom cut our extrusions to length per order, please be sure yourmeasurements for custom cuts are accurate. If you receive something other thanwhat you ordered, contact us at +86 13609699895 or rq4@dgruiquan.com and wewill arrange an immediate replacement or refund of all charges. However, if youare requesting an RMA on heatsinks that have been received as ordered; thesewill be subject to a 30% restocking fee and return shipping will be at thecustomers expense. Any handling or cut fees are non-refundable.  Ifyou need to return an item, simply login to your account, view the order usingthe "Complete Orders" link under the My Account menu and click theReturn Item(s) button. We'll notify you via e-mail of your refund once we'vereceived and processed the returned item.   Or you may contact us to initiate a return.

Mersen's patented swaged fin joint has been tested against equivalent machined fins from a solid block. Thermal tests showed an immeasurable difference on overall heatsink thermal performance.

Mersen's Fabfin finned heatsink family comprises the MF, AF, DF, and FF designations, which respectively provide fin center-to-center (cc) pitch of 3.43, 5.49, 6.86 and 8.51mm; or in terms of fins-per-inch (fpi), 7.4, 4.6, 3.7 and 3.0. The maximum fin height-to-gap ratios are respectively MF 22:1, AF 30:1, DF 27:1, and FF 20:1. Mersen highest ratio heatsink is the Hollow Fin, which uses the DF baseplate, and it has a maximum fin height-to-gap ratio of 48:1. Comparable, state-of-the-art single- piece extrusions can presently achieve max fin ratios only as high as about 15:1. Mersen presently uses extruded fins, which are 1.04, 1.52 and 2.4mm in thickness.

he amount of noise your notebook makes depends on many factors - obviously, on the operating temperature and the CPU load, but also on the operating system configuration, installed drivers, and the BIOS. Did you reinstall your OS before the problem occured? Installed new drivers? Upgraded the BIOS?In some cases, it may help to put your notebook back to its original operating system configuration with the aid of a recovery CD (or recovery partition) supplied by the manufacturer.Refer to you notebook's documentation for instructions how to do that.If you believe that the noise is related to a defect in the notebook's cooling system, read below.

Yes,we can offer anodizing as a add-on service