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Advanced technological development has entered into various fields, Central Processing Unit (CPU) is a part of computer’s hardware that carry out instructions of computer’s program. CPU technology development leads into Smart Technology with the impression of small dimensions yet increase the system’s performance. This results the increasing of heat flux which should be removed from the CPU system to maintain the performance and life of the CPU, the computer’s heat could potentially damage and slow down the computer performance. Therefore, heat pipes has been developed as the cooling systems, where heat pipes have capability to transfer heat but contributes to the high exhausting temperature in the condenser. So that we made the design of Cascade Heat Pipe by combining two heat pipes into one. The design is expected to be able to degrade heat on the processor and also on the condenser. The results showed that the CPU Cooling System Cascade Heat Pipe with single condenser is able to reduce the processor temperature at idle conditions 2.74C, and 1.48C, at maximum idle conditions and 14.94C of condenser part at idle conditions, and 21.12C at maximum conditions, Cascade Heat Pipe with Double condenser can reduce processor temperature 3.89C at idle conditions, and 4.24C at maximum conditions and condenser part 17.12C at idle conditions, and 24.16C at maximum conditions lower than Non Cascade Heat Pipe. Abstrak Perkembangan teknologi telah masuk ke dalam berbagai bidang, Central Processing Unit (CPU) merupakan bagian dari hardware pada sebuah komputer yang melaksanakan instruksi dari program komputer. Saat ini perkembangan CPU mengarah ke Smart Technology, dimana dimensi semakin kecil namun kinerja meningkat. Hal ini mengakibatkan meningkatnya fluks kalor yang harus dibuang untuk menjaga kinerja serta umur pemakaian CPU, panas pada komputer tersebut berpotensi merusak dan memperlambat kerja komputer. Oleh karena itu, heat pipe dikembangkan sebagai salah satu sistem pendingin, dimana heat pipe mampu memindahkan kalor, namun berdampak pada tingginya temperatur keluaran pada bagian kondensor. Sehingga dilakukan perancangan Cascade Heat Pipe dengan menggabungkan dua heat pipe menjadi satu. Harapannya, dapat menurunkan panas pada processor dan juga pada kondensor. Hasil penelitian menunjukan bahwa Sistem Pendingin CPU Cascade Heat Pipe kondensor tunggal mampu menurunkan temperatur processor 2,74 C dan 1,48 C pada kondisi idle dan maksimum dan bagian kondensor 14,94 C dan 21,12 C pada kondisi idle dan maksimum, Cascade Double kondensor mampu menurunkan temperatur processor 3,89 C dan 4,24 C pada kondisi idle dan maksimum dan bagian kondensor 17,12 C dan 24,16 C pada kondisi idle dan maksimum lebih rendah dari Sistem Pendingin Non Cascade.

Penurunan Temperatur Kondensor pada Sistem Pendingin Central Processing Unit (CPU) Berbasis Cascade Straight Heat Pipe