Radeon HD 7870 vs Radeon RX 470

Intro

Compare those specs to the Radeon RX 470, which comes with a clock speed of 926 MHz and a GDDR5 memory frequency of 1650 MHz. It also uses a 256-bit 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 7870		6230 points
	Difference: 5526 (89%)

Zcash Mining Hash Rate

Radeon RX 470		289 Sol/s
Radeon HD 7870		172 Sol/s
	Difference: 117 (68%)

Ethereum Mining Hash Rate

Radeon RX 470		26 Mh/s
Radeon HD 7870		16 Mh/s
	Difference: 10 (63%)

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon RX 470		120 Watts
Radeon HD 7870		175 Watts
	Difference: 55 Watts (46%)

Memory Bandwidth

The Radeon RX 470 should theoretically be quite a bit faster than the Radeon HD 7870 in general. (explain)

Radeon RX 470		211200 MB/sec
Radeon HD 7870		153600 MB/sec
	Difference: 57600 (38%)

Texel Rate

The Radeon RX 470 will be a lot (approximately 48%) better at anisotropic filtering than the Radeon HD 7870. (explain)

Radeon RX 470		118528 Mtexels/sec
Radeon HD 7870		80000 Mtexels/sec
	Difference: 38528 (48%)

Pixel Rate

If running with a high screen resolution is important to you, then the Radeon HD 7870 is superior to the Radeon RX 470, but only just. (explain)

Radeon HD 7870		32000 Mpixels/sec
Radeon RX 470		29632 Mpixels/sec
	Difference: 2368 (8%)

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 data (measured in megabytes per second) that can be moved across the external memory interface within a second. It is calculated by multiplying the bus width by its memory speed. If it uses DDR type RAM, it must be multiplied by 2 once again. If DDR5, multiply by ANOTHER 2x. The better the bandwidth is, the better the card will be in general. It especially helps with anti-aliasing, HDR and higher screen resolutions.

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

Pixel Rate: Pixel rate is the most pixels the video 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 - aka Render Output Units) are responsible for drawing the pixels (image) on 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 ability to get to the max fill rate.