Radeon HD 6870 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 frequency of 1650 MHz. It also uses a 256-bit memory bus, and uses a 14 nm design. It features 2048 SPUs, 128 TAUs, 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

Performance-wise, the Radeon RX 470 should theoretically be quite a bit superior to the Radeon HD 6870 in general. (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 (about 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 is a small bit (more or less 3%) more effective at full screen anti-aliasing than the Radeon HD 6870, and capable of handling higher resolutions without losing too much performance. (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 largest amount of information (measured in megabytes per second) that can be transported past the external memory interface in one second. The number is worked out by multiplying the interface width by the speed of its memory. In the case of DDR type memory, the result should be multiplied by 2 again. If it uses DDR5, multiply by ANOTHER 2x. The higher the card's memory bandwidth, the faster the card will be in general. It especially helps with anti-aliasing, HDR 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 calculated by multiplying the total number of texture units by the core clock speed of the chip. The higher the texel rate, the better the graphics card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels in a second.

Pixel Rate: Pixel rate is the maximum amount of pixels the video card can possibly write 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 core speed of the card. 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 rate also depends on lots of other factors, especially the memory bandwidth of the card - the lower the memory bandwidth is, the lower the ability to get to the maximum fill rate.