Radeon HD 5670 vs Radeon HD 6770

Intro

Compare those specs to the Radeon HD 6770, which has core clock speeds of 900 MHz on the GPU, and 1050 MHz on the 512 MB of GDDR5 RAM. It features 800 SPUs along with 40 TAUs and 16 Rasterization Operator Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 5670		61 Watts
Radeon HD 6770		108 Watts
	Difference: 47 Watts (77%)

Memory Bandwidth

The Radeon HD 6770, in theory, should perform a small bit faster than the Radeon HD 5670 in general. (explain)

Radeon HD 6770		67200 MB/sec
Radeon HD 5670		64000 MB/sec
	Difference: 3200 (5%)

Texel Rate

The Radeon HD 6770 is quite a bit (about 132%) faster with regards to AF than the Radeon HD 5670. (explain)

Radeon HD 6770		36000 Mtexels/sec
Radeon HD 5670		15500 Mtexels/sec
	Difference: 20500 (132%)

Pixel Rate

If running with a high resolution is important to you, then the Radeon HD 6770 is superior to the Radeon HD 5670, by a large margin. (explain)

Radeon HD 6770		14400 Mpixels/sec
Radeon HD 5670		6200 Mpixels/sec
	Difference: 8200 (132%)

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 maximum amount of information (counted in MB per second) that can be moved across the external memory interface in one second. The number is worked out by multiplying the bus width by the speed of its memory. If it uses DDR type 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 anti-aliasing, HDR and higher screen resolutions.

Texel Rate: Texel rate is the maximum number of texture map elements (texels) that can be applied in one second. This number is calculated by multiplying the total amount of texture units by the core clock speed of the chip. The higher this number, the better the video card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels applied per 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. The number is worked out by multiplying the amount of colour ROPs by the the card's clock speed. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel rate is also dependant on many other factors, most notably the memory bandwidth - the lower the bandwidth is, the lower the ability to reach the max fill rate.