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GeForce GTX 550 Ti vs Radeon HD 6750


Intro

The GeForce GTX 550 Ti comes with core speeds of 900 MHz on the GPU, and 1026 MHz on the 1024 MB of GDDR5 RAM. It features 192 SPUs as well as 32 TAUs and 24 Rasterization Operator Units.

Compare all that to the Radeon HD 6750, which comes with GPU clock speed of 725 MHz, and 512 MB of GDDR5 memory set to run at 1000 MHz through a 128-bit bus. It also is comprised of 720 Stream Processors, 36 Texture Address Units, and 16 Raster Operation Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 6750 86 Watts
GeForce GTX 550 Ti 116 Watts
Difference: 30 Watts (35%)

Memory Bandwidth

In theory, the GeForce GTX 550 Ti should be a lot faster than the Radeon HD 6750 overall. (explain)

GeForce GTX 550 Ti 98496 MB/sec
Radeon HD 6750 64000 MB/sec
Difference: 34496 (54%)

Texel Rate

The GeForce GTX 550 Ti will be a small bit (more or less 10%) faster with regards to AF than the Radeon HD 6750. (explain)

GeForce GTX 550 Ti 28800 Mtexels/sec
Radeon HD 6750 26100 Mtexels/sec
Difference: 2700 (10%)

Pixel Rate

The GeForce GTX 550 Ti is much (approximately 86%) faster with regards to full screen anti-aliasing than the Radeon HD 6750, and also will be able to handle higher screen resolutions without slowing down too much. (explain)

GeForce GTX 550 Ti 21600 Mpixels/sec
Radeon HD 6750 11600 Mpixels/sec
Difference: 10000 (86%)

Please note that the above 'benchmarks' are all just theoretical - the results were calculated based on the card's specifications, and real-world performance may (and probably will) vary at least a bit.

Price Comparison

GeForce GTX 550 Ti

Radeon HD 6750

Specifications

Display Specifications

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Model GeForce GTX 550 Ti Radeon HD 6750
Manufacturer nVidia AMD
Year March 2011 January 2011
Code Name GF116 Juniper Pro
Memory 1024 MB 512 MB
Core Speed 900 MHz 725 MHz
Memory Speed 4104 MHz 4000 MHz
Power (Max TDP) 116 watts 86 watts
Bandwidth 98496 MB/sec 64000 MB/sec
Texel Rate 28800 Mtexels/sec 26100 Mtexels/sec
Pixel Rate 21600 Mpixels/sec 11600 Mpixels/sec
Unified Shaders 192 720
Texture Mapping Units 32 36
Render Output Units 24 16
Bus Type GDDR5 GDDR5
Bus Width 192-bit 128-bit
Fab Process 40 nm 40 nm
Transistors 1170 million 1040 million
Bus PCIe 2.1 x16 PCIe x16
DirectX Version DirectX 11 DirectX 11
OpenGL Version OpenGL 4.1 OpenGL 4.0

Memory Bandwidth: Memory bandwidth is the maximum amount of data (in units of megabytes per second) that can be moved over the external memory interface in a second. It is worked out by multiplying the card's interface width by its memory speed. If it uses DDR type memory, the result should be multiplied by 2 again. If it uses DDR5, multiply by 4 instead. The better the memory bandwidth, the faster the card will be in general. It especially helps with anti-aliasing, High Dynamic Range and high resolutions.

Texel Rate: Texel rate is the maximum amount of texture map elements (texels) that can be applied per second. This number is worked out by multiplying the total texture units of the card by the core speed of the chip. The better this number, the better the card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels processed in a second.

Pixel Rate: Pixel rate is the maximum amount of pixels that the graphics chip can possibly write to its local memory per second - measured in millions of pixels per second. The number is worked out by multiplying the number of Render Output Units by the clock speed of the card. ROPs (Raster Operations Pipelines - sometimes also referred to as Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel rate is also dependant on quite a few other factors, especially the memory bandwidth - the lower the memory bandwidth is, the lower the potential to reach the max fill rate.

GeForce GTX 550 Ti

Radeon HD 6750

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