Radeon HD 6770 1GB vs Radeon RX 480 4GB

Intro

Compare all that to the Radeon RX 480 4GB, which has a core clock frequency of 1120 MHz and a GDDR5 memory speed of 1750 MHz. It also makes use of a 256-bit memory bus, and uses a 14 nm design. It is made up of 2304 SPUs, 144 TAUs, and 32 Raster Operation Units.

Display Graphs

Hide Graphs

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 6770 1GB		108 Watts
Radeon RX 480 4GB		150 Watts
	Difference: 42 Watts (39%)

Memory Bandwidth

Theoretically, the Radeon RX 480 4GB should be much faster than the Radeon HD 6770 1GB in general. (explain)

Radeon RX 480 4GB		229376 MB/sec
Radeon HD 6770 1GB		67200 MB/sec
	Difference: 162176 (241%)

Texel Rate

The Radeon RX 480 4GB should be much (about 348%) more effective at texture filtering than the Radeon HD 6770 1GB. (explain)

Radeon RX 480 4GB		161280 Mtexels/sec
Radeon HD 6770 1GB		36000 Mtexels/sec
	Difference: 125280 (348%)

Pixel Rate

The Radeon RX 480 4GB should be quite a bit (more or less 149%) better at FSAA than the Radeon HD 6770 1GB, and also capable of handling higher resolutions while still performing well. (explain)

Radeon RX 480 4GB		35840 Mpixels/sec
Radeon HD 6770 1GB		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: Memory bandwidth is the max amount of data (measured in MB per second) that can be transported over the external memory interface in one second. It's worked out by multiplying the card's interface width by its memory clock speed. If the card has DDR type RAM, it must be multiplied by 2 once again. If it uses DDR5, multiply by 4 instead. The better the memory bandwidth, the better the card will be in general. It especially helps with anti-aliasing, High Dynamic Range and high resolutions.

Texel Rate: Texel rate is the maximum number of texture map elements (texels) that can be processed in one second. This is worked out by multiplying the total amount of texture units of the card by the core speed of the chip. The better this number, the better the video card will be at 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 the graphics 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 amount of Raster Operations Pipelines by the clock speed of the card. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel output rate is also dependant on many other factors, especially the memory bandwidth - the lower the memory bandwidth is, the lower the ability to reach the max fill rate.