Radeon HD 7790 vs Radeon RX 470

Intro

Compare all of that to the Radeon RX 470, which uses a 14 nm design. AMD has clocked the core speed at 926 MHz. The GDDR5 memory works at a frequency of 1650 MHz on this model. It features 2048 SPUs along with 128 Texture Address Units and 32 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 RX 470		11756 points
Radeon HD 7790		4330 points
	Difference: 7426 (172%)

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 7790		85 Watts
Radeon RX 470		120 Watts
	Difference: 35 Watts (41%)

Memory Bandwidth

Theoretically, the Radeon RX 470 should be quite a bit faster than the Radeon HD 7790 overall. (explain)

Radeon RX 470		211200 MB/sec
Radeon HD 7790		96000 MB/sec
	Difference: 115200 (120%)

Texel Rate

The Radeon RX 470 should be much (about 112%) better at AF than the Radeon HD 7790. (explain)

Radeon RX 470		118528 Mtexels/sec
Radeon HD 7790		56000 Mtexels/sec
	Difference: 62528 (112%)

Pixel Rate

The Radeon RX 470 should be quite a bit (about 85%) more effective at anti-aliasing than the Radeon HD 7790, and also will be able to handle higher resolutions without losing too much performance. (explain)

Radeon RX 470		29632 Mpixels/sec
Radeon HD 7790		16000 Mpixels/sec
	Difference: 13632 (85%)

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 information (counted in megabytes per second) that can be transferred over the external memory interface within a second. The number is worked out by multiplying the bus width by its memory speed. In the case of DDR type memory, the result should be multiplied by 2 again. If it uses 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 high resolutions.

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

Pixel Rate: Pixel rate is the maximum number of pixels that the graphics chip can possibly write to the local memory per second - measured in millions of pixels per second. The number is worked out by multiplying the number of Render Output Units by the the card's clock speed. ROPs (Raster Operations Pipelines - sometimes also referred to as 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, most notably the memory bandwidth - the lower the memory bandwidth is, the lower the ability to reach the max fill rate.