Radeon HD 5570 vs Radeon HD 7950

Intro

Compare all of that to the Radeon HD 7950, which features a core clock speed of 800 MHz and a GDDR5 memory frequency of 1250 MHz. It also uses a 384-bit memory bus, and makes use of a 28 nm design. It features 1792 SPUs, 112 Texture Address Units, and 32 Raster Operation Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 5570		43 Watts
Radeon HD 7950		200 Watts
	Difference: 157 Watts (365%)

Memory Bandwidth

The Radeon HD 7950 should in theory be a lot faster than the Radeon HD 5570 overall. (explain)

Radeon HD 7950		240000 MB/sec
Radeon HD 5570		28800 MB/sec
	Difference: 211200 (733%)

Texel Rate

The Radeon HD 7950 is much (more or less 589%) faster with regards to texture filtering than the Radeon HD 5570. (explain)

Radeon HD 7950		89600 Mtexels/sec
Radeon HD 5570		13000 Mtexels/sec
	Difference: 76600 (589%)

Pixel Rate

The Radeon HD 7950 should be quite a bit (more or less 392%) more effective at AA than the Radeon HD 5570, and also capable of handling higher screen resolutions without slowing down too much. (explain)

Radeon HD 7950		25600 Mpixels/sec
Radeon HD 5570		5200 Mpixels/sec
	Difference: 20400 (392%)

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 (measured in MB per second) that can be transferred over the external memory interface in a second. It is calculated by multiplying the interface width by the speed of its memory. In the case of DDR type memory, it must be multiplied by 2 again. If it uses DDR5, multiply by 4 instead. The better the card's memory bandwidth, the faster the card will be in general. It especially helps with anti-aliasing, High Dynamic Range and higher screen resolutions.

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

Pixel Rate: Pixel rate is the maximum amount of pixels the graphics card could possibly record to its local memory per second - measured in millions of pixels per second. The figure is worked out by multiplying the number of ROPs 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 fill 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 get to the maximum fill rate.