MSI GT 640 4GB DDR3 128Bit Gaming Graphics Card

The MSI GT 640 is a graphics card based on the Kepler architecture, specifically utilizing the GK107 GPU. This GPU variant, known as GK107-300-A2, is manufactured by TSMC using a 28 nm process and contains 1,270 million transistors with a density of 10.8M per mm². The die size of the chip is 118 mm², and it is housed in a BGA-908 package.

Key Specifications

• GPU Name: GK107
• Architecture: Kepler
• Foundry: TSMC
• Process Size: 28 nm
• Transistors: 1,270 million
• Density: 10.8M / mm²
• Die Size: 118 mm²
• Chip Package: BGA-908

Graphics Card Information

• Generation: GeForce 600
• Predecessor: GeForce 500
• Successor: GeForce 700
• Production Status: End-of-life

Bus Interface and Clock Speeds

• Bus Interface: PCIe 3.0 x16
• GPU Clock: 902 MHz
• Memory Clock: 891 MHz (1782 Mbps effective)

Memory Configuration

• Memory Sizes: 4 GB options
• Memory Type: DDR3
• Memory Bus: 128-bit
• Bandwidth: 28.51 GB/s

Render Configuration

• Shading Units: 384
• TMUs (Texture Mapping Units): 32
• ROPs (Render Output Units): 16
• SMX Count: 2
• L1 Cache: 16 KB (per SMX)
• L2 Cache: 256 KB

Theoretical Performance

• Pixel Rate: 7.216 GPixel/s
• Texture Rate: 28.86 GTexel/s
• FP32 (float) Performance: 692.7 GFLOPS
• FP64 (double) Performance: 28.86 GFLOPS (1:24 ratio)

Board Design

• Slot Width: Available in single-slot and dual-slot configurations
• Length: 145 mm (5.7 inches) and 154 mm (6.1 inches) variations
• TDP (Thermal Design Power): 65 W
• Suggested PSU (Power Supply Unit): 250 W

Outputs and Power Connectors

• Outputs:
  • 1x DVI
  • 1x HDMI 1.4a
  • 1x DisplayPort 1.2
  • Some models include 1x VGA
• Power Connectors: None

Summary

The MSI GT 640 offers a decent balance of performance and power efficiency for its time, making it suitable for light gaming and multimedia tasks. Its Kepler architecture provides support for newer graphical features while maintaining compatibility with legacy systems. The availability of different memory configurations and output options allows for flexibility in various use cases.