Radeon HD 7870 XT vs Radeon R9 Nano

Intro

Compare those specifications to the Radeon R9 Nano, which comes with a clock frequency of 1000 MHz and a HBM memory frequency of 500 MHz. It also uses a 4096-bit bus, and makes use of a 28 nm design. It is made up of 4096 SPUs, 256 TAUs, and 64 Raster Operation Units.

Display Graphs

Hide Graphs

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

The Radeon R9 Nano should theoretically perform a lot faster than the Radeon HD 7870 XT overall. (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 a lot (about 188%) faster with regards to anisotropic 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

The Radeon R9 Nano will be much (more or less 116%) more effective at full screen anti-aliasing than the Radeon HD 7870 XT, and also should be able to handle higher screen resolutions while still performing well. (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: Bandwidth is the maximum amount of information (in units of MB per second) that can be moved across the external memory interface within a second. The number is worked out by multiplying the interface width by the speed of its memory. In the case of DDR memory, it must be multiplied by 2 again. If it uses DDR5, multiply by ANOTHER 2x. The higher the bandwidth is, the faster 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 per second. This is calculated by multiplying the total 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 applied in a second.

Pixel Rate: Pixel rate is the maximum number of pixels the video card could possibly record to the local memory in one second - measured in millions of pixels per second. The number is worked out by multiplying the amount of Render Output Units by the the card's clock speed. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel output rate is also dependant on quite a few other factors, especially the memory bandwidth - the lower the memory bandwidth is, the lower the ability to get to the maximum fill rate.