Radeon HD 5670 vs Radeon HD 7950 3GB

Intro

Compare those specs to the Radeon HD 7950 3GB, which comes with a clock frequency of 800 MHz and a GDDR5 memory speed of 1250 MHz. It also features a 384-bit bus, and makes use of a 28 nm design. It features 1792 SPUs, 112 TAUs, and 32 ROPs.

Display Graphs

Hide Graphs

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 5670		61 Watts
Radeon HD 7950 3GB		200 Watts
	Difference: 139 Watts (228%)

Memory Bandwidth

Theoretically speaking, the Radeon HD 7950 3GB should be 275% faster than the Radeon HD 5670 in general, because of its higher data rate. (explain)

Radeon HD 7950 3GB		240000 MB/sec
Radeon HD 5670		64000 MB/sec
	Difference: 176000 (275%)

Texel Rate

The Radeon HD 7950 3GB should be much (about 478%) more effective at anisotropic filtering than the Radeon HD 5670. (explain)

Radeon HD 7950 3GB		89600 Mtexels/sec
Radeon HD 5670		15500 Mtexels/sec
	Difference: 74100 (478%)

Pixel Rate

The Radeon HD 7950 3GB will be a lot (about 313%) better at AA than the Radeon HD 5670, and also able to handle higher screen resolutions more effectively. (explain)

Radeon HD 7950 3GB		25600 Mpixels/sec
Radeon HD 5670		6200 Mpixels/sec
	Difference: 19400 (313%)

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 (measured in MB per second) that can be moved past the external memory interface in a second. It's calculated by multiplying the card's bus width by the speed of its memory. If the card has DDR memory, it should be multiplied by 2 once 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, HDR and high resolutions.

Texel Rate: Texel rate is the maximum amount of texture map elements (texels) that can be processed in one second. This figure is worked out by multiplying the total number of texture units by the core clock speed of the chip. The better this number, the better the graphics 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 most pixels the graphics card could possibly write to the local memory in a second - measured in millions of pixels per second. The number is worked out by multiplying the number of Render Output Units by the the card's clock speed. ROPs (Raster Operations Pipelines - sometimes also referred to as Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel output rate also depends on many other factors, most notably the memory bandwidth - the lower the memory bandwidth is, the lower the ability to reach the max fill rate.