Radeon HD 5750 1GB vs Radeon HD 7870 XT

Intro

Compare those specs to the Radeon HD 7870 XT, which comes with core clock speeds of 925 MHz on the GPU, and 1500 MHz on the 2048 MB of GDDR5 memory. It features 1536 SPUs as well as 96 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 7870 XT		185 Watts
	Difference: 99 Watts (115%)

Memory Bandwidth

The Radeon HD 7870 XT should in theory perform much faster than the Radeon HD 5750 1GB overall. (explain)

Radeon HD 7870 XT		192000 MB/sec
Radeon HD 5750 1GB		73600 MB/sec
	Difference: 118400 (161%)

Texel Rate

The Radeon HD 7870 XT will be much (about 252%) faster with regards to texture filtering than the Radeon HD 5750 1GB. (explain)

Radeon HD 7870 XT		88800 Mtexels/sec
Radeon HD 5750 1GB		25200 Mtexels/sec
	Difference: 63600 (252%)

Pixel Rate

The Radeon HD 7870 XT should be quite a bit (about 164%) more effective at full screen anti-aliasing than the Radeon HD 5750 1GB, and also will be capable of handling higher screen resolutions better. (explain)

Radeon HD 7870 XT		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 maximum amount of data (counted in MB per second) that can be transferred across the external memory interface within a second. The number is calculated by multiplying the card's interface width by its memory speed. If it uses DDR RAM, the result should be multiplied by 2 again. If DDR5, multiply by 4 instead. The better the bandwidth is, the faster the card will be in general. It especially helps with anti-aliasing, HDR and high resolutions.

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

Pixel Rate: Pixel rate is the maximum amount of pixels the graphics card can possibly record to its local memory per second - measured in millions of pixels per second. Pixel rate is calculated by multiplying the amount of Render Output Units by the the core 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 output rate also depends on lots of other factors, especially the memory bandwidth of the card - the lower the memory bandwidth is, the lower the potential to reach the maximum fill rate.