Radeon HD 6990 vs Radeon RX 470

Intro

Compare those specifications to the Radeon RX 470, which comes with a core clock speed of 926 MHz and a GDDR5 memory frequency of 1650 MHz. It also makes use of a 256-bit bus, and makes use of a 14 nm design. It features 2048 SPUs, 128 Texture Address Units, and 32 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 RX 470		11756 points
Radeon HD 6990		5820 points
	Difference: 5936 (102%)

Ethereum Mining Hash Rate

Radeon RX 470		26 Mh/s
Radeon HD 6990		24 Mh/s
	Difference: 2 (8%)

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon RX 470		120 Watts
Radeon HD 6990		375 Watts
	Difference: 255 Watts (213%)

Memory Bandwidth

Theoretically speaking, the Radeon HD 6990 should be 52% quicker than the Radeon RX 470 overall, because of its higher data rate. (explain)

Radeon HD 6990		320000 MB/sec
Radeon RX 470		211200 MB/sec
	Difference: 108800 (52%)

Texel Rate

The Radeon HD 6990 will be much (more or less 34%) faster with regards to anisotropic filtering than the Radeon RX 470. (explain)

Radeon HD 6990		159360 Mtexels/sec
Radeon RX 470		118528 Mtexels/sec
	Difference: 40832 (34%)

Pixel Rate

If running with a high screen resolution is important to you, then the Radeon HD 6990 is the winner, and very much so. (explain)

Radeon HD 6990		53120 Mpixels/sec
Radeon RX 470		29632 Mpixels/sec
	Difference: 23488 (79%)

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.

One or more cards in this comparison are multi-core. This means that their bandwidth, texel and pixel rates are theoretically doubled - this does not mean the card will actually perform twice as fast, but only that it should in theory be able to. Actual game benchmarks will give a more accurate idea of what it's capable of.

Price Comparison

Specifications

Memory Bandwidth: Memory bandwidth is the largest amount of data (counted in MB per second) that can be transferred over the external memory interface within a second. The number is calculated by multiplying the interface width by the speed of its memory. In the case of DDR type RAM, the result should be multiplied by 2 once 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 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 number of texture units of the card by the core clock speed of the chip. The higher this number, the better the card will be at 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 that the graphics card could possibly write to the local memory per second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the amount of colour ROPs by the the card's clock speed. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel output rate is also dependant on quite a few other factors, most notably the memory bandwidth - the lower the bandwidth is, the lower the potential to reach the max fill rate.