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GeForce 6600 Architecture

Good 3D Performance at a Middling Price: GeForce 6600 Shootout
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The architecture of the GeForce 6600 graphics processor - codenamed "NV43" - is based on the NV40/45 graphics processor introduced last year, which is used on GeForce 6800 cards. On paper, NVIDIA's GeForce 6 card series offers the most modern 3D architecture currently on the market, with full DirectX 9.0c or Shader Model 3.0 support.

The structure of NVIDIA's NV43 graphics processor (GeForce 6600).

To bring the production costs of the graphics processor down to the midrange level, NVIDIA trimmed the NV43 GPU down in a few areas. The NV43 is equipped with only 8 pixel pipelines, instead of the 16 or 12 of the NV40/45. The number of vertex shader units was also reduced from 6 to 3, and the memory interface was cut from 256 bits to 128 bits in width. These measures save on transistors, and reduce the production costs of the circuit boards.

  ATI Radeon X700 Pro NVIDIA GeForce 6600 GT NVIDIA GeForce 6600
Codename RV410 NV43 NV43
Chip Technology 256 bit 256 bit 256 bit
Process 0.11 Micron 0.11 Micron 0.11 Micron
Transistors 120 Million 143 Million 143 Million
Memory Bus 128 bit GDDR3 128 bit GDDR3 128 bit GDDR
Memory Bandwidth 13.8 GB/s 16.0 GB/s 11.2 GB/s
Pixel Fillrate 1700M Pixel/s 2000M Pixel/s 1200M Pixel/s
Max FSAA Mode 6x 4x / 4xMS+2xSS 4x / 4xMS+2xSS
Triangle Transform Rate 637.5 M Triangles/s 375M Vertices/sec 225M Vertices/sec
Bus x16 PEG, AGP (soon) x16 PEG, AGP x16 PEG, AGP
Memory 128/256MB 128/256MB 128/256MB
GPU Clock 425 MHz 500 MHz 300 MHz
Memory Clock 430 MHz (860 DDR) 500 MHz (1000 DDR) 350 MHz (700 DDR)
Vertex Shader 6 3 Units 3 Units
Pixel Pipelines 8x1 8x1 / 16x0 8x1 / 16x0
Texture Units Per Pipe 1 1 1
Vertex S. Version 2 3 3
Pixel S. Version 2.0 Extended 3 3
DirectX Generation 9 9.0c 9.0c
FSAA Modi MultiSampling MultiSampling
SuperSampling Mixed Mode
MultiSampling
SuperSampling Mixed Mode
Memory Optmizations Hyper Z HD LMA III Optimized
Color Compression
LMA III Optimized
Color Compression
Optmizations SmartShader HD
SmoothVision HD
IntelliSample 3.0 IntelliSample 3.0
Display Outputs 2 2 2
Chip Internal Ramdacs 2 x 400 MHz 2 x 400 MHz 2 x 400 MHz
Chip External Ramdacs - - -
Bits per Color Channel 10 10 10
Special TV Encoder On-Chip;
VideoShader HD;
3Dc Compression;
Temporal AA;
Adaptive Filtering;
F-Buffer
Video Processor and TV Encoder On-Chip;
Extended Progammability;
Adaptive Filtering, True Trilinear Filtering, UltraShadow
Video Processor and TV Encoder On-Chip;
Extended Progammability
Adaptive Filtering, True Trilinear Filtering, UltraShadow
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