Radeon HD 7870 XT vs Radeon R9 Nano

Intro

Compare that to the Radeon R9 Nano, which uses a 28 nm design. AMD has clocked the core frequency at 1000 MHz. The HBM RAM works at a frequency of 500 MHz on this specific model. It features 4096 SPUs along with 256 TAUs and 64 Rasterization Operator 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 R9 Nano		14918 points
Radeon HD 7870 XT		6390 points
	Difference: 8528 (133%)

Ethereum Mining Hash Rate

Radeon R9 Nano		30 Mh/s
Radeon HD 7870 XT		15 Mh/s
	Difference: 15 (100%)

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon R9 Nano		175 Watts
Radeon HD 7870 XT		185 Watts
	Difference: 10 Watts (6%)

Memory Bandwidth

Performance-wise, the Radeon R9 Nano should in theory be quite a bit superior to the Radeon HD 7870 XT in general. (explain)

Radeon R9 Nano		512000 MB/sec
Radeon HD 7870 XT		192000 MB/sec
	Difference: 320000 (167%)

Texel Rate

The Radeon R9 Nano should be much (approximately 188%) better at texture filtering than the Radeon HD 7870 XT. (explain)

Radeon R9 Nano		256000 Mtexels/sec
Radeon HD 7870 XT		88800 Mtexels/sec
	Difference: 167200 (188%)

Pixel Rate

If running with a high screen resolution is important to you, then the Radeon R9 Nano is a better choice, by far. (explain)

Radeon R9 Nano		64000 Mpixels/sec
Radeon HD 7870 XT		29600 Mpixels/sec
	Difference: 34400 (116%)

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 (counted in MB per second) that can be transferred past the external memory interface in a second. The number is calculated by multiplying the card's bus width by its memory speed. If it uses DDR memory, the result should be multiplied by 2 once again. If DDR5, multiply by ANOTHER 2x. The better the card's memory bandwidth, the faster the card will be in general. It especially helps with AA, High Dynamic Range and higher screen resolutions.

Texel Rate: Texel rate is the maximum texture map elements (texels) that can be processed in one second. This figure is worked out by multiplying the total amount of texture units by the core clock speed of the chip. The better this number, the better the graphics 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 amount 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 calculated by multiplying the number of Render Output Units by the the core speed of the card. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel fill rate also depends on lots of other factors, especially the memory bandwidth - the lower the memory bandwidth is, the lower the potential to reach the maximum fill rate.