Radeon HD 6770 1GB vs Radeon RX 570

Intro

Compare those specifications to the Radeon RX 570, which comes with GPU core speed of 1168 MHz, and 4096 MB of GDDR5 RAM set to run at 1750 MHz through a 256-bit bus. It also is made up of 2048 Stream Processors, 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 1GB		108 Watts
Radeon RX 570		150 Watts
	Difference: 42 Watts (39%)

Memory Bandwidth

The Radeon RX 570, in theory, should perform quite a bit faster than the Radeon HD 6770 1GB in general. (explain)

Radeon RX 570		229376 MB/sec
Radeon HD 6770 1GB		67200 MB/sec
	Difference: 162176 (241%)

Texel Rate

The Radeon RX 570 will be quite a bit (more or less 315%) more effective at texture filtering than the Radeon HD 6770 1GB. (explain)

Radeon RX 570		149504 Mtexels/sec
Radeon HD 6770 1GB		36000 Mtexels/sec
	Difference: 113504 (315%)

Pixel Rate

The Radeon RX 570 should be a lot (approximately 160%) better at full screen anti-aliasing than the Radeon HD 6770 1GB, and capable of handling higher resolutions without slowing down too much. (explain)

Radeon RX 570		37376 Mpixels/sec
Radeon HD 6770 1GB		14400 Mpixels/sec
	Difference: 22976 (160%)

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 (counted in megabytes per second) that can be transported over the external memory interface within a second. It's calculated by multiplying the card's interface width by its memory clock speed. If it uses DDR type memory, it must be multiplied by 2 once again. If it uses DDR5, multiply by ANOTHER 2x. 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 can be applied in one second. This figure is worked out by multiplying the total amount of texture units of the card by the core clock speed of the chip. The better this number, the better the card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels applied in one second.

Pixel Rate: Pixel rate is the maximum amount of pixels that the graphics chip can possibly record to the local memory per second - measured in millions of pixels per second. Pixel rate is calculated by multiplying the number of ROPs by the the card's clock speed. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel rate also depends on quite a few other factors, especially the memory bandwidth of the card - the lower the bandwidth is, the lower the potential to get to the maximum fill rate.