Radeon HD 6770 1GB vs Radeon RX 470 4GB

Intro

Compare those specs to the Radeon RX 470 4GB, which comes with a core clock frequency of 926 MHz and a GDDR5 memory frequency 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 TAUs, and 32 Raster Operation Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 6770 1GB		108 Watts
Radeon RX 470 4GB		120 Watts
	Difference: 12 Watts (11%)

Memory Bandwidth

As far as performance goes, the Radeon RX 470 4GB should in theory be a lot superior to the Radeon HD 6770 1GB in general. (explain)

Radeon RX 470 4GB		211200 MB/sec
Radeon HD 6770 1GB		67200 MB/sec
	Difference: 144000 (214%)

Texel Rate

The Radeon RX 470 4GB should be quite a bit (about 229%) faster with regards to AF than the Radeon HD 6770 1GB. (explain)

Radeon RX 470 4GB		118528 Mtexels/sec
Radeon HD 6770 1GB		36000 Mtexels/sec
	Difference: 82528 (229%)

Pixel Rate

If running with a high screen resolution is important to you, then the Radeon RX 470 4GB is superior to the Radeon HD 6770 1GB, by a large margin. (explain)

Radeon RX 470 4GB		29632 Mpixels/sec
Radeon HD 6770 1GB		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: Memory bandwidth is the largest amount of information (measured in megabytes per second) that can be transported past the external memory interface in one second. It's worked out by multiplying the interface width by its memory speed. If it uses DDR 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 higher screen resolutions.

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

Pixel Rate: Pixel rate is the maximum number of pixels the video card could possibly write 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 core speed of the card. ROPs (Raster Operations Pipelines - sometimes also referred to as Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel rate is also dependant on many other factors, especially the memory bandwidth of the card - the lower the bandwidth is, the lower the potential to reach the maximum fill rate.