Radeon HD 6870 vs Radeon RX 470

Intro

Compare all of that to the Radeon RX 470, which has core clock speeds of 926 MHz on the GPU, and 1650 MHz on the 8192 MB of GDDR5 RAM. It features 2048 SPUs along with 128 Texture Address Units and 32 Rasterization Operator Units.

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

Theoretically speaking, the Radeon RX 470 should be a lot faster than the Radeon HD 6870 overall. (explain)

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

Texel Rate

The Radeon RX 470 is quite a bit (approximately 135%) faster with regards to 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

The Radeon RX 470 will be a little bit (approximately 3%) faster with regards to AA than the Radeon HD 6870, and will be capable of handling higher screen resolutions while still performing well. (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: Memory bandwidth is the maximum amount of information (measured in megabytes per second) that can be moved over the external memory interface in one second. It is worked out by multiplying the bus width by the speed of its memory. In the case of DDR RAM, it must be multiplied by 2 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, HDR and high resolutions.

Texel Rate: Texel rate is the maximum amount of texture map elements (texels) that can be applied per second. This is calculated by multiplying the total texture units of the card by the core clock speed of the chip. The better this number, the better the 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 most pixels that the graphics card could possibly write to the local memory per second - measured in millions of pixels per second. Pixel rate is calculated by multiplying the amount of Raster Operations Pipelines 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 fill rate is also dependant on quite a few other factors, especially the memory bandwidth of the card - the lower the memory bandwidth is, the lower the potential to reach the maximum fill rate.