Radeon HD 6770 vs Radeon RX 470 4GB

Intro

Compare that to the Radeon RX 470 4GB, which comes with core clock speeds of 926 MHz on the GPU, and 1650 MHz on the 4096 MB of GDDR5 memory. It features 2048 SPUs along with 128 Texture Address Units and 32 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 6770		108 Watts
Radeon RX 470 4GB		120 Watts
	Difference: 12 Watts (11%)

Memory Bandwidth

The Radeon RX 470 4GB should in theory perform quite a bit faster than the Radeon HD 6770 overall. (explain)

Radeon RX 470 4GB		211200 MB/sec
Radeon HD 6770		67200 MB/sec
	Difference: 144000 (214%)

Texel Rate

The Radeon RX 470 4GB is quite a bit (more or less 229%) better at anisotropic filtering than the Radeon HD 6770. (explain)

Radeon RX 470 4GB		118528 Mtexels/sec
Radeon HD 6770		36000 Mtexels/sec
	Difference: 82528 (229%)

Pixel Rate

The Radeon RX 470 4GB should be quite a bit (approximately 106%) better at full screen anti-aliasing than the Radeon HD 6770, and also will be capable of handling higher resolutions more effectively. (explain)

Radeon RX 470 4GB		29632 Mpixels/sec
Radeon HD 6770		14400 Mpixels/sec
	Difference: 15232 (106%)

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 past the external memory interface within a second. It is calculated by multiplying the bus width by its memory speed. If it uses DDR RAM, it should be multiplied by 2 again. If it uses DDR5, multiply by ANOTHER 2x. The higher the memory bandwidth, the faster the card will be in general. It especially helps with anti-aliasing, High Dynamic Range and higher screen resolutions.

Texel Rate: Texel rate is the maximum number of texture map elements (texels) that are processed per second. This number is worked out by multiplying the total texture units by the core speed of the chip. The better this number, the better the card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels applied in one second.

Pixel Rate: Pixel rate is the maximum number of pixels that the graphics card can possibly write to its local memory in one second - measured in millions of pixels per second. The figure is worked out by multiplying the number of Raster Operations Pipelines by the the card's 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 also depends on many other factors, most notably the memory bandwidth of the card - the lower the bandwidth is, the lower the ability to reach the max fill rate.