Radeon HD 6990 vs Radeon RX 480

Intro

Compare those specs to the Radeon RX 480, which uses a 14 nm design. AMD has set the core speed at 1120 MHz. The GDDR5 RAM is set to run at a frequency of 2000 MHz on this specific model. It features 2304 SPUs along with 144 TAUs and 32 ROPs.

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 480		13349 points
Radeon HD 6990		5820 points
	Difference: 7529 (129%)

Ethereum Mining Hash Rate

Radeon RX 480		27 Mh/s
Radeon HD 6990		24 Mh/s
	Difference: 3 (13%)

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon RX 480		150 Watts
Radeon HD 6990		375 Watts
	Difference: 225 Watts (150%)

Memory Bandwidth

Theoretically speaking, the Radeon HD 6990 should perform quite a bit faster than the Radeon RX 480 in general. (explain)

Radeon HD 6990		320000 MB/sec
Radeon RX 480		262144 MB/sec
	Difference: 57856 (22%)

Texel Rate

The Radeon RX 480 should be just a bit (more or less 1%) more effective at anisotropic filtering than the Radeon HD 6990. (explain)

Radeon RX 480		161280 Mtexels/sec
Radeon HD 6990		159360 Mtexels/sec
	Difference: 1920 (1%)

Pixel Rate

The Radeon HD 6990 will be quite a bit (approximately 48%) better at anti-aliasing than the Radeon RX 480, and will be able to handle higher screen resolutions without slowing down too much. (explain)

Radeon HD 6990		53120 Mpixels/sec
Radeon RX 480		35840 Mpixels/sec
	Difference: 17280 (48%)

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 maximum amount of data (in units of megabytes per second) that can be transported past the external memory interface within a second. It is calculated by multiplying the interface width by the speed of its memory. In the case of DDR type RAM, it must be multiplied by 2 again. If DDR5, multiply by 4 instead. The higher the memory bandwidth, the faster the card will be in general. It especially helps with anti-aliasing, HDR and high resolutions.

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

Pixel Rate: Pixel rate is the most pixels the video card can possibly record to the local memory in one second - measured in millions of pixels per second. Pixel rate is calculated by multiplying the amount of ROPs by the the core speed of the card. 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 quite a few other factors, especially the memory bandwidth - the lower the memory bandwidth is, the lower the ability to get to the maximum fill rate.