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Radeon HD 6990 vs Radeon RX 470

Intro

The Radeon HD 6990 makes use of a 40 nm design. AMD has clocked the core speed at 830 MHz. The GDDR5 memory is set to run at a speed of 1250 MHz on this card. It features 1536 SPUs along with 96 TAUs and 32 Rasterization Operator Units.

Compare those specifications to the Radeon RX 470, which uses a 14 nm design. AMD has clocked the core speed at 926 MHz. The GDDR5 RAM works at a frequency of 1650 MHz on this card. It features 2048 SPUs along with 128 Texture Address Units and 32 ROPs.

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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

The Radeon HD 6990, in theory, should perform quite a bit faster than the Radeon RX 470 overall. (explain)

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

Texel Rate

The Radeon HD 6990 is a lot (approximately 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

The Radeon HD 6990 will be a lot (about 79%) more effective at full screen anti-aliasing than the Radeon RX 470, and also will be capable of handling higher resolutions better. (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

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Radeon HD 6990

Amazon.com

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Radeon RX 470

Amazon.com

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Please note that the price comparisons are based on search keywords - sometimes it might show cards with very similar names that are not exactly the same as the one chosen in the comparison. We do try to filter out the wrong results as best we can, though.

Specifications

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Model Radeon HD 6990 Radeon RX 470
Manufacturer AMD AMD
Year March 2011 August 2016
Code Name Antilles Polaris 10
Memory 2048 MB (x2) 8192 MB
Core Speed 830 MHz (x2) 926 MHz
Memory Speed 5000 MHz (x2) 6600 MHz
Power (Max TDP) 375 watts 120 watts
Bandwidth 320000 MB/sec 211200 MB/sec
Texel Rate 159360 Mtexels/sec 118528 Mtexels/sec
Pixel Rate 53120 Mpixels/sec 29632 Mpixels/sec
Unified Shaders 1536 (x2) 2048
Texture Mapping Units 96 (x2) 128
Render Output Units 32 (x2) 32
Bus Type GDDR5 GDDR5
Bus Width 256-bit (x2) 256-bit
Fab Process 40 nm 14 nm
Transistors 2640 million 5700 million
Bus PCIe 2.1 x16 PCIe 3.0 x16
DirectX Version DirectX 11 DirectX 12.0
OpenGL Version OpenGL 4.1 OpenGL 4.5

Memory Bandwidth: Bandwidth is the maximum amount of data (measured in MB per second) that can be transferred over the external memory interface in a second. The number is calculated by multiplying the bus width by the speed of its memory. If it uses DDR RAM, it must be multiplied by 2 once again. If DDR5, multiply by 4 instead. The higher the memory bandwidth, the better 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 number is worked out by multiplying the total texture units of the card by the core speed of the chip. The better this number, the better the graphics 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 most pixels that the graphics card could possibly write to the local memory in one second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the amount of Render Output Units by the the core speed of the card. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel fill rate also depends on many other factors, most notably the memory bandwidth of the card - the lower the bandwidth is, the lower the ability to reach the maximum fill rate.

Display Prices

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Radeon HD 6990

Amazon.com

Check prices at:

Radeon RX 470

Amazon.com

Check prices at:

Please note that the price comparisons are based on search keywords - sometimes it might show cards with very similar names that are not exactly the same as the one chosen in the comparison. We do try to filter out the wrong results as best we can, though.

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