Radeon HD 6770 vs Radeon R7 M260X

Intro

Compare those specs to the Radeon R7 M260X, which uses a 28 nm design. AMD has set the core speed at 825 MHz. The GDDR5 RAM runs at a speed of 1000 MHz on this particular 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

The Radeon HD 6770 should theoretically perform a bit faster than the Radeon R7 M260X overall. (explain)

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

Texel Rate

The Radeon HD 6770 is a lot (more or less 82%) better at anisotropic 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 should be much (more or less 118%) better at AA than the Radeon R7 M260X, and also will be able to handle higher 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 maximum amount of data (measured in megabytes per second) that can be moved across the external memory interface within a second. It is worked out by multiplying the card's interface width by its memory speed. In the case of DDR RAM, the result should be multiplied by 2 once again. If DDR5, multiply by 4 instead. The higher the memory bandwidth, the better the card will be in general. It especially helps with anti-aliasing, HDR and higher screen resolutions.

Texel Rate: Texel rate is the maximum amount of texture map elements (texels) that are processed in one second. This figure is worked out by multiplying the total amount of texture units of the card by the core speed of the chip. The higher the texel rate, the better the 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 number of pixels that the graphics chip can possibly write to its local memory in one second - measured in millions of pixels per second. The figure is calculated by multiplying the number of Render Output Units by the the card's clock speed. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel fill rate also depends on quite a few other factors, especially the memory bandwidth of the card - the lower the memory bandwidth is, the lower the potential to reach the max fill rate.