Find HS Code and trade information for ddr ram

DDR RAM

DDR RAM (Double Data Rate Random Access Memory) is a type of synchronous dynamic random-access memory (SDRAM) commonly used in modern computing devices. It significantly improved upon its predecessor, SDR SDRAM, by effectively doubling the bandwidth.

Material

DDR RAM chips are constructed primarily from silicon semiconductors. These chips are mounted on a small circuit board, typically green, with heat spreaders often added for improved thermal dissipation, particularly in high-performance modules. The boards also contain various electronic components like resistors, capacitors, and a Programmable Read-Only Memory (PROM) chip storing module information (timing, manufacturer, etc.).

Purpose

The primary purpose of DDR RAM is to provide fast, temporary storage for data that the CPU needs to access quickly. It serves as the main memory in computers, enabling multitasking, running applications, and loading operating systems. Unlike storage devices like hard drives or SSDs, RAM is volatile, meaning it loses its data when power is removed.

Function

DDR RAM functions by storing data in memory cells consisting of capacitors and transistors. The "Double Data Rate" refers to its ability to transfer data twice per clock cycle – once on the rising edge and once on the falling edge – compared to SDR SDRAM which transfers data only once per clock cycle. This is achieved through a double-pumped bus architecture. Data is accessed via memory addresses and controlled by the memory controller, typically integrated into the CPU.

Usage Scenarios

• Desktop Computers: The standard memory for everyday computing tasks, gaming, and professional applications.
• Laptops: Used in both standard and high-performance laptops. SO-DIMM (Small Outline DIMM) form factor is commonly used due to space constraints.
• Servers: High-capacity, error-correcting code (ECC) DDR RAM is crucial for server stability and performance.
• Gaming Consoles: Used to store game data and assets for fast loading and smooth gameplay.
• Graphics Cards: GDDR (Graphics Double Data Rate) RAM, a specialized type of DDR RAM, is used for storing textures, frame buffers, and other graphical data.

Common Types

• DDR: The original Double Data Rate RAM, now largely obsolete.
• DDR2: Improved upon DDR with faster speeds and lower power consumption. Also largely obsolete.
• DDR3: Further improvements in speed, power efficiency, and capacity compared to DDR2. Still found in older systems.
• DDR4: The current standard for most modern systems, offering significantly higher speeds, capacity, and lower voltage than DDR3.
• DDR5: The newest generation of DDR RAM, providing even greater bandwidth, capacity, and power efficiency than DDR4. Requires compatible motherboards and CPUs.
• ECC DDR RAM: (Error-Correcting Code) Includes additional circuitry to detect and correct common types of internal data corruption, used primarily in servers and workstations.
• Registered/Unbuffered RAM: Used in servers for increased stability with large memory configurations.
• SO-DIMM: (Small Outline DIMM) A smaller form factor of DIMM, used in laptops and small form factor desktops.

DDR RAM typically refers to Dynamic read-write random access memory (DRAM). Based on the provided information, the following HS codes are relevant:

• 8542320002: Electronic integrated circuits; parts thereof: Electronic integrated circuits: Memories Dynamic read-write random access (DRAM): Not over 128 megabits. This code covers DRAM with a capacity of 128 megabits or less. The total tax rate is 80.0%, comprised of a 0.0% base tariff and a 50.0% additional tariff, increasing to 30% after April 2, 2025.
• 8542320024: Electronic integrated circuits; parts thereof: Electronic integrated circuits: Memories Dynamic read-write random access (DRAM): Over 128 megabits but not over 256 megabits. This code applies to DRAM with a capacity exceeding 128 megabits but not exceeding 256 megabits. The total tax rate is also 80.0%, with a 0.0% base tariff and a 50.0% additional tariff, which will increase to 30% after April 2, 2025.

Explanation of HS Code Structure:

• 85: Chapter 85 covers Electronic integrated circuits.
• 42: Heading 42 specifically refers to Electronic integrated circuits; parts thereof.
• 32: Subheading 32 details Electronic integrated circuits: Memories.
• 0002 / 0024: Further specifies the type of memory (Dynamic read-write random access (DRAM)) and its capacity range.

Regarding these HS codes, please note the additional tariff of 50.0% currently in effect, which is scheduled to change to 30% after April 2, 2025. It is important to consider the capacity of the DDR RAM when determining the correct HS code to use.