Radeon HD 5750 1GB vs Radeon HD 7970

Intro

Compare those specifications to the Radeon HD 7970, which features a core clock speed of 925 MHz and a GDDR5 memory frequency of 1375 MHz. It also makes use of a 384-bit memory bus, and makes use of a 28 nm design. It features 2048 SPUs, 128 TAUs, and 32 Raster Operation Units.

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

Theoretically, the Radeon HD 7970 should perform quite a bit faster than the Radeon HD 5750 1GB overall. (explain)

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

Texel Rate

The Radeon HD 7970 is a lot (more or less 370%) more effective at texture 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 should be a lot (more or less 164%) more effective at FSAA than the Radeon HD 5750 1GB, and able to handle higher screen resolutions better. (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: Bandwidth is the max amount of information (in units of MB per second) that can be transferred past the external memory interface within a second. The number is worked out by multiplying the card's bus width by the speed of its memory. In the case of DDR RAM, the result should be multiplied by 2 again. If DDR5, multiply by 4 instead. The better the card's memory bandwidth, the faster the card will be in general. It especially helps with AA, High Dynamic Range and high resolutions.

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

Pixel Rate: Pixel rate is the maximum amount of pixels that the graphics chip could possibly write to the local memory in one second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the number of ROPs 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 rate also depends on quite a few other factors, especially the memory bandwidth - the lower the bandwidth is, the lower the ability to reach the maximum fill rate.