Radeon HD 7870 XT vs Radeon RX 570

Intro

Compare all of that to the Radeon RX 570, which comes with a core clock speed of 1168 MHz and a GDDR5 memory frequency of 1750 MHz. It also features a 256-bit bus, and makes use of a 14 nm design. It is made up 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 570		12108 points
Radeon HD 7870 XT		6390 points
	Difference: 5718 (89%)

Ethereum Mining Hash Rate

Radeon RX 570		26 Mh/s
Radeon HD 7870 XT		15 Mh/s
	Difference: 11 (73%)

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon RX 570		150 Watts
Radeon HD 7870 XT		185 Watts
	Difference: 35 Watts (23%)

Memory Bandwidth

Theoretically speaking, the Radeon RX 570 is 19% quicker than the Radeon HD 7870 XT in general, due to its higher data rate. (explain)

Radeon RX 570		229376 MB/sec
Radeon HD 7870 XT		192000 MB/sec
	Difference: 37376 (19%)

Texel Rate

The Radeon RX 570 will be a lot (about 68%) better at texture filtering than the Radeon HD 7870 XT. (explain)

Radeon RX 570		149504 Mtexels/sec
Radeon HD 7870 XT		88800 Mtexels/sec
	Difference: 60704 (68%)

Pixel Rate

The Radeon RX 570 will be quite a bit (about 26%) better at AA than the Radeon HD 7870 XT, and also should be capable of handling higher screen resolutions better. (explain)

Radeon RX 570		37376 Mpixels/sec
Radeon HD 7870 XT		29600 Mpixels/sec
	Difference: 7776 (26%)

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 data (measured in MB per second) that can be transported across the external memory interface in one second. The number is worked out by multiplying the card's interface width by its memory clock speed. If the card has DDR memory, it should be multiplied by 2 once again. If DDR5, multiply by ANOTHER 2x. The higher the memory bandwidth, the faster the card will be in general. It especially helps with anti-aliasing, High Dynamic Range and high resolutions.

Texel Rate: Texel rate is the maximum amount of texture map elements (texels) that are applied in one second. This is calculated by multiplying the total number of texture units by the core speed of the chip. The higher this number, the better the video 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 maximum number of pixels that the graphics chip could possibly write to its local memory in one second - measured in millions of pixels per second. The figure is calculated by multiplying the amount of Render Output Units by the the core clock speed. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel fill rate is also dependant on lots of other factors, most notably the memory bandwidth of the card - the lower the bandwidth is, the lower the ability to reach the max fill rate.