Radeon HD 5750 512MB vs Radeon HD 7870

Intro

Compare those specs to the Radeon HD 7870, which makes use of a 28 nm design. AMD has set the core speed at 1000 MHz. The GDDR5 RAM is set to run at a speed of 1200 MHz on this specific card. It features 1280 SPUs along with 80 Texture Address Units and 32 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 5750 512MB		86 Watts
Radeon HD 7870		175 Watts
	Difference: 89 Watts (103%)

Memory Bandwidth

Performance-wise, the Radeon HD 7870 should theoretically be quite a bit superior to the Radeon HD 5750 512MB in general. (explain)

Radeon HD 7870		153600 MB/sec
Radeon HD 5750 512MB		73600 MB/sec
	Difference: 80000 (109%)

Texel Rate

The Radeon HD 7870 is quite a bit (approximately 217%) faster with regards to texture filtering than the Radeon HD 5750 512MB. (explain)

Radeon HD 7870		80000 Mtexels/sec
Radeon HD 5750 512MB		25200 Mtexels/sec
	Difference: 54800 (217%)

Pixel Rate

The Radeon HD 7870 should be much (about 186%) faster with regards to full screen anti-aliasing than the Radeon HD 5750 512MB, and also will be capable of handling higher screen resolutions without slowing down too much. (explain)

Radeon HD 7870		32000 Mpixels/sec
Radeon HD 5750 512MB		11200 Mpixels/sec
	Difference: 20800 (186%)

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 max amount of data (measured in MB per second) that can be transported over the external memory interface in a second. It's calculated by multiplying the interface width by its memory clock speed. If it uses DDR RAM, it must be multiplied by 2 again. If DDR5, multiply by 4 instead. The higher the memory bandwidth, the better the card will be in general. It especially helps with AA, HDR and higher screen resolutions.

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

Pixel Rate: Pixel rate is the maximum amount of pixels the video card can possibly write to the local memory per second - measured in millions of pixels per second. The figure is calculated by multiplying the number of colour ROPs by the the core speed of the card. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel fill rate also depends on many other factors, most notably the memory bandwidth - the lower the memory bandwidth is, the lower the ability to get to the maximum fill rate.