Radeon HD 6770 1GB vs Radeon R9 280X

Intro

Compare all that to the Radeon R9 280X, which uses a 28 nm design. AMD has clocked the core frequency at 850 MHz. The GDDR5 RAM runs at a frequency of 1500 MHz on this model. It features 2048 SPUs as well as 128 Texture Address Units and 32 Rasterization Operator Units.

Display Graphs

Hide Graphs

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

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

Memory Bandwidth

Theoretically, the Radeon R9 280X should be much faster than the Radeon HD 6770 1GB overall. (explain)

Radeon R9 280X		288000 MB/sec
Radeon HD 6770 1GB		67200 MB/sec
	Difference: 220800 (329%)

Texel Rate

The Radeon R9 280X should be quite a bit (more or less 202%) faster with regards to AF than the Radeon HD 6770 1GB. (explain)

Radeon R9 280X		108800 Mtexels/sec
Radeon HD 6770 1GB		36000 Mtexels/sec
	Difference: 72800 (202%)

Pixel Rate

The Radeon R9 280X is much (more or less 89%) better at anti-aliasing than the Radeon HD 6770 1GB, and will be able to handle higher screen resolutions more effectively. (explain)

Radeon R9 280X		27200 Mpixels/sec
Radeon HD 6770 1GB		14400 Mpixels/sec
	Difference: 12800 (89%)

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 megabytes per second) that can be moved past the external memory interface in a second. It is worked out by multiplying the interface width by its memory speed. In the case of DDR type memory, it should be multiplied by 2 again. If it uses 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 higher screen resolutions.

Texel Rate: Texel rate is the maximum number of texture map elements (texels) that are processed per second. This 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 card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels in one second.

Pixel Rate: Pixel rate is the maximum amount of pixels the video card can possibly record to its local memory per second - measured in millions of pixels per second. The figure is calculated by multiplying the amount of Raster Operations Pipelines by the the core clock speed. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel fill rate also depends on many other factors, especially the memory bandwidth - the lower the memory bandwidth is, the lower the ability to get to the maximum fill rate.