Radeon HD 6770 1GB vs Radeon R9 280

Intro

Compare that to the Radeon R9 280, which has core speeds of 933 MHz on the GPU, and 1250 MHz on the 3072 MB of GDDR5 memory. It features 1792 SPUs along with 112 Texture Address Units and 32 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 6770 1GB		108 Watts
Radeon R9 280		250 Watts
	Difference: 142 Watts (131%)

Memory Bandwidth

As far as performance goes, the Radeon R9 280 should theoretically be quite a bit better than the Radeon HD 6770 1GB in general. (explain)

Radeon R9 280		240000 MB/sec
Radeon HD 6770 1GB		67200 MB/sec
	Difference: 172800 (257%)

Texel Rate

The Radeon R9 280 should be much (more or less 190%) better at texture filtering than the Radeon HD 6770 1GB. (explain)

Radeon R9 280		104496 Mtexels/sec
Radeon HD 6770 1GB		36000 Mtexels/sec
	Difference: 68496 (190%)

Pixel Rate

If running with a high screen resolution is important to you, then the Radeon R9 280 is the winner, by far. (explain)

Radeon R9 280		29856 Mpixels/sec
Radeon HD 6770 1GB		14400 Mpixels/sec
	Difference: 15456 (107%)

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 information (in units of megabytes per second) that can be transferred over the external memory interface in a second. The number is worked out by multiplying the card's interface width by its memory speed. If it uses DDR memory, it must be multiplied by 2 again. If DDR5, multiply by 4 instead. The higher the bandwidth is, 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 are 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 better the texel rate, the better the graphics card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels processed in one second.

Pixel Rate: Pixel rate is the maximum number of pixels that the graphics card could possibly record to the local memory per second - measured in millions of pixels per second. The number is calculated by multiplying the amount of ROPs by the the core clock speed. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel fill rate is also dependant on quite a few other factors, most notably the memory bandwidth of the card - the lower the bandwidth is, the lower the potential to reach the max fill rate.