Radeon HD 6950 2GB vs Radeon RX 570

Intro

Compare that to the Radeon RX 570, which uses a 14 nm design. AMD has clocked the core speed at 1168 MHz. The GDDR5 RAM works at a speed of 1750 MHz on this particular model. It features 2048 SPUs along with 128 Texture Address Units and 32 Rasterization Operator Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon RX 570		150 Watts
Radeon HD 6950 2GB		200 Watts
	Difference: 50 Watts (33%)

Memory Bandwidth

Theoretically speaking, the Radeon RX 570 should perform much faster than the Radeon HD 6950 2GB overall. (explain)

Radeon RX 570		229376 MB/sec
Radeon HD 6950 2GB		160000 MB/sec
	Difference: 69376 (43%)

Texel Rate

The Radeon RX 570 will be quite a bit (approximately 112%) more effective at AF than the Radeon HD 6950 2GB. (explain)

Radeon RX 570		149504 Mtexels/sec
Radeon HD 6950 2GB		70400 Mtexels/sec
	Difference: 79104 (112%)

Pixel Rate

The Radeon RX 570 is a lot (more or less 46%) more effective at anti-aliasing than the Radeon HD 6950 2GB, and will be capable of handling higher screen resolutions more effectively. (explain)

Radeon RX 570		37376 Mpixels/sec
Radeon HD 6950 2GB		25600 Mpixels/sec
	Difference: 11776 (46%)

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 (measured in megabytes per second) that can be moved over the external memory interface within a second. The number is worked out by multiplying the bus width by the speed of its memory. In the case of DDR type RAM, the result should be multiplied by 2 again. If DDR5, multiply by 4 instead. The higher the card's memory bandwidth, the faster the card will be in general. It especially helps with anti-aliasing, HDR and high resolutions.

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

Pixel Rate: Pixel rate is the maximum number of pixels the video card can possibly record to its local memory in one second - measured in millions of pixels per second. The figure is worked out by multiplying the number of Raster Operations Pipelines by the the card's clock speed. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel rate also depends on lots of other factors, most notably the memory bandwidth of the card - the lower the memory bandwidth is, the lower the potential to reach the maximum fill rate.