Radeon HD 6990 vs Radeon RX 470 4GB

Intro

Compare all that to the Radeon RX 470 4GB, which features a core clock speed of 926 MHz and a GDDR5 memory frequency of 1650 MHz. It also uses a 256-bit bus, and uses 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.

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Radeon RX 470 4GB		27 Mh/s
Radeon HD 6990		24 Mh/s
	Difference: 3 (13%)

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon RX 470 4GB		120 Watts
Radeon HD 6990		375 Watts
	Difference: 255 Watts (213%)

Memory Bandwidth

As far as performance goes, the Radeon HD 6990 should in theory be much better than the Radeon RX 470 4GB overall. (explain)

Radeon HD 6990		320000 MB/sec
Radeon RX 470 4GB		211200 MB/sec
	Difference: 108800 (52%)

Texel Rate

The Radeon HD 6990 will be quite a bit (about 34%) more effective at AF than the Radeon RX 470 4GB. (explain)

Radeon HD 6990		159360 Mtexels/sec
Radeon RX 470 4GB		118528 Mtexels/sec
	Difference: 40832 (34%)

Pixel Rate

The Radeon HD 6990 is a lot (more or less 79%) faster with regards to anti-aliasing than the Radeon RX 470 4GB, and also will be able to handle higher resolutions better. (explain)

Radeon HD 6990		53120 Mpixels/sec
Radeon RX 470 4GB		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: Bandwidth is the maximum amount of information (counted in MB per second) that can be transported across the external memory interface in one second. The number is worked out by multiplying the interface width by the speed of its memory. If it uses DDR type memory, the result should 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 AA, HDR and higher screen resolutions.

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

Pixel Rate: Pixel rate is the most pixels the graphics card could possibly record to its local memory in a second - measured in millions of pixels per second. The figure is worked out by multiplying the amount of ROPs by the clock speed of the card. ROPs (Raster Operations Pipelines - sometimes also referred to as Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel fill rate is also dependant on quite a few other factors, most notably the memory bandwidth - the lower the memory bandwidth is, the lower the ability to get to the maximum fill rate.