Radeon HD 7870 vs Radeon R9 Nano

Intro

Compare those specifications to the Radeon R9 Nano, which comes with GPU core speed of 1000 MHz, and 4096 MB of HBM RAM running at 500 MHz through a 4096-bit bus. It also is made up of 4096 Stream Processors, 256 TAUs, and 64 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 R9 Nano		14918 points
Radeon HD 7870		6230 points
	Difference: 8688 (139%)

Zcash Mining Hash Rate

Radeon R9 Nano		402 Sol/s
Radeon HD 7870		172 Sol/s
	Difference: 230 (134%)

Ethereum Mining Hash Rate

Radeon R9 Nano		30 Mh/s
Radeon HD 7870		16 Mh/s
	Difference: 14 (88%)

Power Usage and Theoretical Benchmarks

Both cards have the same power consumption.

Memory Bandwidth

As far as performance goes, the Radeon R9 Nano should theoretically be much superior to the Radeon HD 7870 overall. (explain)

Radeon R9 Nano		512000 MB/sec
Radeon HD 7870		153600 MB/sec
	Difference: 358400 (233%)

Texel Rate

The Radeon R9 Nano is a lot (more or less 220%) faster with regards to anisotropic filtering than the Radeon HD 7870. (explain)

Radeon R9 Nano		256000 Mtexels/sec
Radeon HD 7870		80000 Mtexels/sec
	Difference: 176000 (220%)

Pixel Rate

The Radeon R9 Nano should be much (more or less 100%) more effective at AA than the Radeon HD 7870, and also will be able to handle higher resolutions without losing too much performance. (explain)

Radeon R9 Nano		64000 Mpixels/sec
Radeon HD 7870		32000 Mpixels/sec
	Difference: 32000 (100%)

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 MB per second) that can be transported across the external memory interface within a second. It's worked out by multiplying the card's interface width by the speed of its memory. If it uses DDR type memory, it should be multiplied by 2 again. If it uses DDR5, multiply by ANOTHER 2x. The better the memory bandwidth, the faster the card will be in general. It especially helps with AA, HDR and high resolutions.

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

Pixel Rate: Pixel rate is the maximum number of pixels that the graphics chip could possibly write to its local memory per second - measured in millions of pixels per second. The number is worked out by multiplying the amount of ROPs by the clock 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 many other factors, especially the memory bandwidth of the card - the lower the memory bandwidth is, the lower the potential to get to the max fill rate.