Radeon HD 5750 1GB vs Radeon HD 7850

Intro

Compare those specifications to the Radeon HD 7850, which has a core clock frequency of 860 MHz and a GDDR5 memory speed of 1200 MHz. It also features a 256-bit memory bus, and uses a 28 nm design. It is made up of 1024 SPUs, 64 Texture Address Units, and 32 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 5750 1GB		86 Watts
Radeon HD 7850		130 Watts
	Difference: 44 Watts (51%)

Memory Bandwidth

In theory, the Radeon HD 7850 should perform much faster than the Radeon HD 5750 1GB in general. (explain)

Radeon HD 7850		153600 MB/sec
Radeon HD 5750 1GB		73600 MB/sec
	Difference: 80000 (109%)

Texel Rate

The Radeon HD 7850 is quite a bit (more or less 118%) faster with regards to anisotropic filtering than the Radeon HD 5750 1GB. (explain)

Radeon HD 7850		55040 Mtexels/sec
Radeon HD 5750 1GB		25200 Mtexels/sec
	Difference: 29840 (118%)

Pixel Rate

The Radeon HD 7850 should be much (more or less 146%) faster with regards to full screen anti-aliasing than the Radeon HD 5750 1GB, and also should be capable of handling higher resolutions without losing too much performance. (explain)

Radeon HD 7850		27520 Mpixels/sec
Radeon HD 5750 1GB		11200 Mpixels/sec
	Difference: 16320 (146%)

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: Memory bandwidth is the maximum amount of information (in units of MB per second) that can be moved across the external memory interface in a second. The number is worked out by multiplying the card's bus width by its memory clock speed. If it uses DDR RAM, it should be multiplied by 2 again. If it uses DDR5, multiply by 4 instead. The higher the bandwidth is, the better the card will be in general. It especially helps with anti-aliasing, HDR and higher screen resolutions.

Texel Rate: Texel rate is the maximum number of texture map elements (texels) that are applied per second. This number is worked out by multiplying the total number of texture units of the card by the core speed of the chip. The better this number, the better the graphics 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 number of pixels that the graphics chip can possibly record to the local memory per second - measured in millions of pixels per second. The figure is calculated by multiplying the amount of colour ROPs by the the core clock speed. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel rate also depends on quite a few other factors, especially the memory bandwidth - the lower the memory bandwidth is, the lower the potential to reach the maximum fill rate.