Radeon HD 6870 vs Radeon RX 470

Intro

Compare that to the Radeon RX 470, which makes use of a 14 nm design. AMD has clocked the core speed at 926 MHz. The GDDR5 RAM works at a frequency of 1650 MHz on this specific card. It features 2048 SPUs as well as 128 Texture Address Units and 32 ROPs.

Display Graphs

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Benchmarks

These are real-world performance benchmarks that were submitted by Hardware Compare users. The scores seen here are the average of all benchmarks submitted for each respective test and hardware.

3DMark Fire Strike Graphics Score

Radeon RX 470		11756 points
Radeon HD 6870		2870 points
	Difference: 8886 (310%)

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon RX 470		120 Watts
Radeon HD 6870		151 Watts
	Difference: 31 Watts (26%)

Memory Bandwidth

In theory, the Radeon RX 470 should be 57% quicker than the Radeon HD 6870 overall, because of its greater data rate. (explain)

Radeon RX 470		211200 MB/sec
Radeon HD 6870		134400 MB/sec
	Difference: 76800 (57%)

Texel Rate

The Radeon RX 470 should be a lot (more or less 135%) better at texture filtering than the Radeon HD 6870. (explain)

Radeon RX 470		118528 Mtexels/sec
Radeon HD 6870		50400 Mtexels/sec
	Difference: 68128 (135%)

Pixel Rate

If using lots of anti-aliasing is important to you, then the Radeon RX 470 is superior to the Radeon HD 6870, but only just. (explain)

Radeon RX 470		29632 Mpixels/sec
Radeon HD 6870		28800 Mpixels/sec
	Difference: 832 (3%)

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 max amount of information (counted in megabytes per second) that can be transferred past the external memory interface in one second. It is calculated by multiplying the bus width by its memory clock speed. In the case of DDR type memory, it should be multiplied by 2 again. If it uses DDR5, multiply by ANOTHER 2x. The better the bandwidth is, the better the card will be in general. It especially helps with AA, HDR and higher screen resolutions.

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

Pixel Rate: Pixel rate is the maximum amount of pixels the graphics card can possibly write to the local memory in one second - measured in millions of pixels per second. The number is calculated by multiplying the number of Render Output Units by the the core clock speed. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel output rate also depends on many other factors, especially the memory bandwidth - the lower the memory bandwidth is, the lower the potential to get to the maximum fill rate.