Radeon HD 5670 vs Radeon HD 5750 1GB

Intro

Compare those specifications to the Radeon HD 5750 1GB, which features a GPU core clock speed of 700 MHz, and 1024 MB of GDDR5 RAM running at 1150 MHz through a 128-bit bus. It also features 720(144x5) Stream Processors, 36 Texture Address Units, and 16 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 5670		61 Watts
Radeon HD 5750 1GB		86 Watts
	Difference: 25 Watts (41%)

Memory Bandwidth

Theoretically speaking, the Radeon HD 5750 1GB will be 15% quicker than the Radeon HD 5670 in general, because of its higher bandwidth. (explain)

Radeon HD 5750 1GB		73600 MB/sec
Radeon HD 5670		64000 MB/sec
	Difference: 9600 (15%)

Texel Rate

The Radeon HD 5750 1GB should be much (about 63%) faster with regards to texture filtering than the Radeon HD 5670. (explain)

Radeon HD 5750 1GB		25200 Mtexels/sec
Radeon HD 5670		15500 Mtexels/sec
	Difference: 9700 (63%)

Pixel Rate

If running with a high resolution is important to you, then the Radeon HD 5750 1GB is a better choice, by far. (explain)

Radeon HD 5750 1GB		11200 Mpixels/sec
Radeon HD 5670		6200 Mpixels/sec
	Difference: 5000 (81%)

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

Specifications

Memory Bandwidth: Bandwidth is the max amount of data (in units of megabytes per second) that can be transferred past the external memory interface within a second. It's worked out by multiplying the card's interface width by the speed of its memory. If it uses DDR memory, it must be multiplied by 2 once again. If it uses DDR5, multiply by ANOTHER 2x. The higher the card's memory bandwidth, the better the card will be in general. It especially helps with anti-aliasing, HDR and high resolutions.

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

Pixel Rate: Pixel rate is the maximum amount of pixels that the graphics chip could possibly write to the local memory per second - measured in millions of pixels per second. Pixel rate is calculated by multiplying the number of ROPs by the the card's clock speed. 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 output rate also depends on lots of other factors, especially the memory bandwidth of the card - the lower the memory bandwidth is, the lower the potential to reach the max fill rate.