Radeon HD 6790 vs Radeon R9 Nano

Intro

Compare all of that to the Radeon R9 Nano, which uses a 28 nm design. AMD has clocked the core frequency at 1000 MHz. The HBM memory works at a frequency of 500 MHz on this card. It features 4096 SPUs along with 256 TAUs and 64 Rasterization Operator 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 6790		2150 points
	Difference: 12768 (594%)

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 6790		150 Watts
Radeon R9 Nano		175 Watts
	Difference: 25 Watts (17%)

Memory Bandwidth

Theoretically, the Radeon R9 Nano should perform quite a bit faster than the Radeon HD 6790 overall. (explain)

Radeon R9 Nano		512000 MB/sec
Radeon HD 6790		134400 MB/sec
	Difference: 377600 (281%)

Texel Rate

The Radeon R9 Nano should be a lot (about 662%) faster with regards to AF than the Radeon HD 6790. (explain)

Radeon R9 Nano		256000 Mtexels/sec
Radeon HD 6790		33600 Mtexels/sec
	Difference: 222400 (662%)

Pixel Rate

If using a high screen resolution is important to you, then the Radeon R9 Nano is a better choice, and very much so. (explain)

Radeon R9 Nano		64000 Mpixels/sec
Radeon HD 6790		13440 Mpixels/sec
	Difference: 50560 (376%)

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 max amount of information (counted in MB per second) that can be moved past the external memory interface in a second. The number is worked out by multiplying the bus width by its memory clock speed. If it uses DDR type RAM, it must be multiplied by 2 once again. If it uses DDR5, multiply by 4 instead. The better the bandwidth is, the better the card will be in general. It especially helps with AA, HDR and higher screen resolutions.

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

Pixel Rate: Pixel rate is the maximum amount of pixels the graphics card can possibly record to the local memory in one second - measured in millions of pixels per second. The number is calculated by multiplying the number of Render Output Units by the the card's 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 many other factors, especially the memory bandwidth of the card - the lower the bandwidth is, the lower the ability to get to the maximum fill rate.