Radeon HD 7790 vs Radeon R9 Nano

Intro

Compare those specs to the Radeon R9 Nano, which comes with GPU clock speed of 1000 MHz, and 4096 MB of HBM RAM set to run at 500 MHz through a 4096-bit bus. It also features 4096 SPUs, 256 TAUs, and 64 ROPs.

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 7790		4330 points
	Difference: 10588 (245%)

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 7790		85 Watts
Radeon R9 Nano		175 Watts
	Difference: 90 Watts (106%)

Memory Bandwidth

As far as performance goes, the Radeon R9 Nano should in theory be much better than the Radeon HD 7790 in general. (explain)

Radeon R9 Nano		512000 MB/sec
Radeon HD 7790		96000 MB/sec
	Difference: 416000 (433%)

Texel Rate

The Radeon R9 Nano should be much (approximately 357%) better at anisotropic filtering than the Radeon HD 7790. (explain)

Radeon R9 Nano		256000 Mtexels/sec
Radeon HD 7790		56000 Mtexels/sec
	Difference: 200000 (357%)

Pixel Rate

If using a high resolution is important to you, then the Radeon R9 Nano is the winner, by far. (explain)

Radeon R9 Nano		64000 Mpixels/sec
Radeon HD 7790		16000 Mpixels/sec
	Difference: 48000 (300%)

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 megabytes per second) that can be moved over the external memory interface in a second. The number is calculated by multiplying the card's bus width by its memory speed. In the case of DDR type RAM, the result should be multiplied by 2 again. If DDR5, multiply by ANOTHER 2x. The higher the card's memory bandwidth, the faster the card will be in general. It especially helps with AA, HDR and higher screen resolutions.

Texel Rate: Texel rate is the maximum number of texture map elements (texels) that are processed in one second. This is worked out by multiplying the total texture units by the core clock speed of the chip. The higher the texel rate, the better the video card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels applied per second.

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