Radeon HD 5750 1GB vs Radeon HD 7970

Intro

Compare those specifications to the Radeon HD 7970, which features a GPU core clock speed of 925 MHz, and 3072 MB of GDDR5 RAM set to run at 1375 MHz through a 384-bit bus. It also is made up of 2048 SPUs, 128 TAUs, 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 7970		250 Watts
	Difference: 164 Watts (191%)

Memory Bandwidth

The Radeon HD 7970 should theoretically be much faster than the Radeon HD 5750 1GB in general. (explain)

Radeon HD 7970		264000 MB/sec
Radeon HD 5750 1GB		73600 MB/sec
	Difference: 190400 (259%)

Texel Rate

The Radeon HD 7970 should be a lot (about 370%) faster with regards to anisotropic filtering than the Radeon HD 5750 1GB. (explain)

Radeon HD 7970		118400 Mtexels/sec
Radeon HD 5750 1GB		25200 Mtexels/sec
	Difference: 93200 (370%)

Pixel Rate

The Radeon HD 7970 is much (approximately 164%) more effective at full screen anti-aliasing than the Radeon HD 5750 1GB, and also will be able to handle higher screen resolutions while still performing well. (explain)

Radeon HD 7970		29600 Mpixels/sec
Radeon HD 5750 1GB		11200 Mpixels/sec
	Difference: 18400 (164%)

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 information (measured in megabytes per second) that can be transferred across the external memory interface in one second. It's calculated by multiplying the bus width by the speed of its memory. If it uses DDR type memory, it must be multiplied by 2 again. If it uses DDR5, multiply by 4 instead. The better the memory bandwidth, the better 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 number of texture map elements (texels) that are processed per second. This is worked out by multiplying the total number of texture units of the card by the core speed of the chip. The higher this number, the better the video card will be at 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 card can possibly write to the local memory in a second - measured in millions of pixels per second. The number is calculated by multiplying the number of Raster Operations Pipelines by the the core clock speed. ROPs (Raster Operations Pipelines - sometimes also referred to as Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel fill rate is also dependant on many other factors, especially the memory bandwidth of the card - the lower the bandwidth is, the lower the ability to reach the maximum fill rate.