Radeon HD 6770 1GB vs Radeon RX 470

Intro

Compare those specifications to the Radeon RX 470, which has a clock frequency of 926 MHz and a GDDR5 memory speed of 1650 MHz. It also features a 256-bit memory bus, and makes use of a 14 nm design. It is made up of 2048 SPUs, 128 TAUs, 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 470		120 Watts
	Difference: 12 Watts (11%)

Memory Bandwidth

Theoretically speaking, the Radeon RX 470 should perform much faster than the Radeon HD 6770 1GB overall. (explain)

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

Texel Rate

The Radeon RX 470 will be a lot (more or less 229%) better at AF than the Radeon HD 6770 1GB. (explain)

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

Pixel Rate

If using a high resolution is important to you, then the Radeon RX 470 is the winner, by a large margin. (explain)

Radeon RX 470		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: Bandwidth is the largest amount of data (counted in megabytes per second) that can be transferred across the external memory interface within a second. It's worked out by multiplying the card's interface width by its memory clock speed. In the case of DDR type memory, it should be multiplied by 2 once again. If it uses DDR5, multiply by 4 instead. The better the card's memory bandwidth, the faster 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 processed in one second. This number is worked out by multiplying the total number of texture units of the card by the core clock speed of the chip. The better this number, the better the graphics 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 amount of pixels the graphics card could possibly record to its local memory in a second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the number of ROPs by the the core 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 rate is also dependant on lots of other factors, especially the memory bandwidth of the card - the lower the bandwidth is, the lower the potential to get to the max fill rate.