Radeon HD 6770 vs Radeon RX 480 4GB

Intro

Compare those specs to the Radeon RX 480 4GB, which makes use of a 14 nm design. AMD has set the core speed at 1120 MHz. The GDDR5 memory works at a speed of 1750 MHz on this specific model. It features 2304 SPUs along with 144 Texture Address Units and 32 Rasterization Operator Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 6770		108 Watts
Radeon RX 480 4GB		150 Watts
	Difference: 42 Watts (39%)

Memory Bandwidth

Performance-wise, the Radeon RX 480 4GB should theoretically be a lot superior to the Radeon HD 6770 overall. (explain)

Radeon RX 480 4GB		229376 MB/sec
Radeon HD 6770		67200 MB/sec
	Difference: 162176 (241%)

Texel Rate

The Radeon RX 480 4GB is a lot (about 348%) more effective at AF than the Radeon HD 6770. (explain)

Radeon RX 480 4GB		161280 Mtexels/sec
Radeon HD 6770		36000 Mtexels/sec
	Difference: 125280 (348%)

Pixel Rate

If running with a high screen resolution is important to you, then the Radeon RX 480 4GB is a better choice, by a large margin. (explain)

Radeon RX 480 4GB		35840 Mpixels/sec
Radeon HD 6770		14400 Mpixels/sec
	Difference: 21440 (149%)

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 MB per second) that can be transferred over the external memory interface in one second. The number is calculated by multiplying the bus width by the speed of its memory. If it uses DDR memory, the result 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, High Dynamic Range 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 texture units of the card by the core speed of the chip. The better this number, the better the graphics card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels per second.

Pixel Rate: Pixel rate is the most pixels the video card can possibly record to its local memory per second - measured in millions of pixels per second. The figure is worked out 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 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 ability to reach the max fill rate.