Radeon HD 7870 XT vs Radeon RX 470

Intro

Compare those specifications to the Radeon RX 470, which has GPU clock speed of 926 MHz, and 8192 MB of GDDR5 RAM set to run at 1650 MHz through a 256-bit bus. It also is comprised of 2048 SPUs, 128 TAUs, and 32 Raster Operation 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 7870 XT		6390 points
	Difference: 5366 (84%)

Ethereum Mining Hash Rate

Radeon RX 470		26 Mh/s
Radeon HD 7870 XT		15 Mh/s
	Difference: 11 (73%)

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon RX 470		120 Watts
Radeon HD 7870 XT		185 Watts
	Difference: 65 Watts (54%)

Memory Bandwidth

As far as performance goes, the Radeon RX 470 should theoretically be a little bit better than the Radeon HD 7870 XT in general. (explain)

Radeon RX 470		211200 MB/sec
Radeon HD 7870 XT		192000 MB/sec
	Difference: 19200 (10%)

Texel Rate

The Radeon RX 470 should be quite a bit (about 33%) better at anisotropic filtering than the Radeon HD 7870 XT. (explain)

Radeon RX 470		118528 Mtexels/sec
Radeon HD 7870 XT		88800 Mtexels/sec
	Difference: 29728 (33%)

Pixel Rate

The Radeon RX 470 should be a little bit (more or less 0%) more effective at AA than the Radeon HD 7870 XT, and also capable of handling higher resolutions while still performing well. (explain)

Radeon RX 470		29632 Mpixels/sec
Radeon HD 7870 XT		29600 Mpixels/sec
	Difference: 32 (0%)

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 max amount of data (counted in MB per second) that can be transferred across the external memory interface in a second. The number is worked out by multiplying the card's bus width by its memory speed. If the card has DDR RAM, the result should be multiplied by 2 again. If 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, High Dynamic Range and higher screen resolutions.

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

Pixel Rate: Pixel rate is the maximum amount of pixels the graphics card can possibly record to the local memory in a second - measured in millions of pixels per second. The figure is worked out by multiplying the amount of Raster Operations Pipelines by the the core clock speed. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel fill rate also depends on quite a few other factors, most notably the memory bandwidth of the card - the lower the memory bandwidth is, the lower the potential to get to the max fill rate.