Radeon HD 7870 vs Radeon RX 570

Intro

Compare those specifications to the Radeon RX 570, which features a clock speed of 1168 MHz and a GDDR5 memory speed of 1750 MHz. It also makes use of a 256-bit memory bus, and uses a 14 nm design. It is made up of 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 570		12108 points
Radeon HD 7870		6230 points
	Difference: 5878 (94%)

Zcash Mining Hash Rate

Radeon RX 570		298 Sol/s
Radeon HD 7870		172 Sol/s
	Difference: 126 (73%)

Ethereum Mining Hash Rate

Radeon RX 570		26 Mh/s
Radeon HD 7870		16 Mh/s
	Difference: 10 (63%)

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon RX 570		150 Watts
Radeon HD 7870		175 Watts
	Difference: 25 Watts (17%)

Memory Bandwidth

Theoretically speaking, the Radeon RX 570 should be 49% quicker than the Radeon HD 7870 overall, due to its greater bandwidth. (explain)

Radeon RX 570		229376 MB/sec
Radeon HD 7870		153600 MB/sec
	Difference: 75776 (49%)

Texel Rate

The Radeon RX 570 will be quite a bit (about 87%) more effective at texture filtering than the Radeon HD 7870. (explain)

Radeon RX 570		149504 Mtexels/sec
Radeon HD 7870		80000 Mtexels/sec
	Difference: 69504 (87%)

Pixel Rate

If running with a high screen resolution is important to you, then the Radeon RX 570 is the winner, though only just barely. (explain)

Radeon RX 570		37376 Mpixels/sec
Radeon HD 7870		32000 Mpixels/sec
	Difference: 5376 (17%)

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 information (counted in megabytes per second) that can be transported across the external memory interface in a second. It is worked out by multiplying the interface width by its memory speed. In the case of DDR RAM, it should be multiplied by 2 again. If it uses DDR5, multiply by 4 instead. The better the card's memory bandwidth, the better 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 texture map elements (texels) that are applied in one second. This figure 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 video card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels processed in one second.

Pixel Rate: Pixel rate is the maximum number of pixels the graphics card can possibly write to the local memory in one second - measured in millions of pixels per second. The figure is worked out by multiplying the amount of colour ROPs by the the core speed of the card. ROPs (Raster Operations Pipelines - sometimes also referred to as Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel rate is also dependant on lots of other factors, especially the memory bandwidth - the lower the memory bandwidth is, the lower the ability to get to the maximum fill rate.