Radeon HD 6770 1GB vs Radeon RX 570

Intro

Compare those specifications to the Radeon RX 570, which has a clock frequency of 1168 MHz and a GDDR5 memory speed of 1750 MHz. It also features a 256-bit memory bus, and uses a 14 nm design. It is made up of 2048 SPUs, 128 Texture Address Units, 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 570		150 Watts
	Difference: 42 Watts (39%)

Memory Bandwidth

Theoretically, the Radeon RX 570 should perform much faster than the Radeon HD 6770 1GB overall. (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 (approximately 315%) better at AF 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

If running with a high screen resolution is important to you, then the Radeon RX 570 is a better choice, and very much so. (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: Memory bandwidth is the largest amount of information (measured in megabytes per second) that can be moved across the external memory interface in a second. It's calculated by multiplying the card's interface width by its memory speed. If the card has DDR memory, it should be multiplied by 2 once again. If DDR5, multiply by ANOTHER 2x. The higher the bandwidth is, the better 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 number of texture map elements (texels) that can be applied in one second. This is worked out by multiplying the total amount of texture units of the card by the core clock speed of the chip. The higher this number, the better the video card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels in one second.

Pixel Rate: Pixel rate is the maximum number of pixels that the graphics card can possibly write to its local memory in a 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 - sometimes also referred to as Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel output rate also depends on many other factors, most notably the memory bandwidth - the lower the memory bandwidth is, the lower the potential to get to the max fill rate.