Radeon HD 6770 vs Radeon R7 M260X

Intro

Compare those specs to the Radeon R7 M260X, which makes use of a 28 nm design. AMD has clocked the core frequency at 825 MHz. The GDDR5 memory is set to run at a frequency of 1000 MHz on this specific model. It features 384 SPUs along with 24 TAUs and 8 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Memory Bandwidth

Theoretically, the Radeon HD 6770 should be a little bit faster than the Radeon R7 M260X in general. (explain)

Radeon HD 6770		67200 MB/sec
Radeon R7 M260X		64000 MB/sec
	Difference: 3200 (5%)

Texel Rate

The Radeon HD 6770 will be quite a bit (more or less 82%) better at texture filtering than the Radeon R7 M260X. (explain)

Radeon HD 6770		36000 Mtexels/sec
Radeon R7 M260X		19800 Mtexels/sec
	Difference: 16200 (82%)

Pixel Rate

The Radeon HD 6770 is much (about 118%) faster with regards to FSAA than the Radeon R7 M260X, and also will be able to handle higher screen resolutions while still performing well. (explain)

Radeon HD 6770		14400 Mpixels/sec
Radeon R7 M260X		6600 Mpixels/sec
	Difference: 7800 (118%)

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 largest amount of data (measured in MB per second) that can be moved past the external memory interface in a second. It's calculated by multiplying the bus width by the speed of its memory. If it uses DDR memory, it must be multiplied by 2 once again. If it uses DDR5, multiply by 4 instead. The better the bandwidth is, the better the card will be in general. It especially helps with anti-aliasing, HDR and high resolutions.

Texel Rate: Texel rate is the maximum amount of texture map elements (texels) that are applied per 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 applied per second.

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