Samsung GDDR5 4Gb DRAM – 128M x 32

High-Speed Graphics DRAM for Mid-Range GPUs

Samsung GDDR5 4Gb (128M x 32) is a discrete graphics DRAM designed for mid-range GPUs, gaming consoles, and performance-oriented computing platforms. It delivers high data bandwidth and improved power efficiency compared to previous-generation GDDR3 solutions.

Supporting data rates up to 9.0 Gbps (speed grade dependent), this memory enables smooth 3D rendering, HD video processing, and graphics-intensive workloads in embedded and discrete GPU architectures.

Key Technical Specifications

• Memory Type: GDDR5
• Density: 4Gb
• Organization: 128M x 32
• Data Rate: Up to 8.0 / 7.0 Gbps (part dependent)
• Package: 170-ball FBGA
• Refresh: 16K / 32 ms
• Voltage: Lower power than GDDR3 (~25% reduction)
• Product Status: EOL

Performance Characteristics

With its 32-bit interface and high-speed I/O architecture, Samsung GDDR5 4Gb significantly increases graphics bandwidth compared to GDDR3. Data transfer rates up to 9.0 Gbps allow improved frame rendering and reduced latency in graphics pipelines.

This makes it suitable as graphics DRAM for gaming GPUs, console memory subsystems, and embedded graphics accelerators requiring stable bandwidth performance.

Power Efficiency

Operating at reduced voltage levels compared to GDDR3 (1.5 V baseline), Samsung GDDR5 achieves approximately 25% lower power consumption while delivering higher throughput. Lower thermal output contributes to improved board-level design flexibility and cooling efficiency.

Part Number List

• K4G41325FE-HC25 – 8.0 Gbps – 170 FBGA – EOL
• K4G41325FE-HC28 – 7.0 Gbps – 170 FBGA – EOL

Application Areas

• Mid-range discrete graphics cards
• Gaming consoles
• Embedded GPU systems
• Performance-oriented computing platforms

FAQ

Q1: Is Samsung GDDR5 4Gb a memory module?
No. It is a standalone DRAM chip designed to be soldered onto GPU PCBs. It is not a DIMM or pluggable memory module.

Q2: What does 128M x 32 mean?
128M x 32 describes the internal memory organization. It indicates 128 million addresses with a 32-bit data width.

Q3: Is this product still in production?
The listed part numbers are marked EOL (End of Life). Availability depends on remaining channel inventory.