Radeon HD 6770 vs Radeon RX 470 4GB

Intro

Compare those specifications to the Radeon RX 470 4GB, which has a clock speed of 926 MHz and a GDDR5 memory speed of 1650 MHz. It also makes use of a 256-bit bus, and makes use of a 14 nm design. It features 2048 SPUs, 128 Texture Address Units, and 32 Raster Operation Units.

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

In theory, the Radeon RX 470 4GB should be 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 should be much (approximately 229%) faster with regards to AF 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 will be quite a bit (about 106%) faster with regards to full screen anti-aliasing than the Radeon HD 6770, and also should be able to handle higher screen resolutions better. (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 largest amount of information (counted in megabytes per second) that can be transported across the external memory interface in a second. It's calculated by multiplying the interface width by the speed of its memory. If it uses DDR RAM, the result should 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, High Dynamic Range and higher screen resolutions.

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

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