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Radeon HD 6990 vs Radeon RX 460

Intro

The Radeon HD 6990 makes use of a 40 nm design. AMD has set the core frequency at 830 MHz. The GDDR5 RAM works at a speed of 1250 MHz on this model. It features 1536 SPUs along with 96 Texture Address Units and 32 ROPs.

Compare all that to the Radeon RX 460, which comes with a core clock speed of 1090 MHz and a GDDR5 memory frequency of 1750 MHz. It also features a 128-bit bus, and makes use of a 14 nm design. It is comprised of 896 SPUs, 56 Texture Address Units, and 16 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 HD 6990 5820 points
Radeon RX 460 5595 points
Difference: 225 (4%)

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon RX 460 75 Watts
Radeon HD 6990 375 Watts
Difference: 300 Watts (400%)

Memory Bandwidth

Performance-wise, the Radeon HD 6990 should in theory be a lot better than the Radeon RX 460 in general. (explain)

Radeon HD 6990 320000 MB/sec
Radeon RX 460 112000 MB/sec
Difference: 208000 (186%)

Texel Rate

The Radeon HD 6990 should be a lot (more or less 161%) more effective at texture filtering than the Radeon RX 460. (explain)

Radeon HD 6990 159360 Mtexels/sec
Radeon RX 460 61040 Mtexels/sec
Difference: 98320 (161%)

Pixel Rate

The Radeon HD 6990 should be quite a bit (more or less 205%) better at FSAA than the Radeon RX 460, and also able to handle higher screen resolutions better. (explain)

Radeon HD 6990 53120 Mpixels/sec
Radeon RX 460 17440 Mpixels/sec
Difference: 35680 (205%)

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 460

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.

Specifications

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Model Radeon HD 6990 Radeon RX 460
Manufacturer AMD AMD
Year March 2011 August 2016
Code Name Antilles Polaris 11
Memory 2048 MB (x2) 4096 MB
Core Speed 830 MHz (x2) 1090 MHz
Memory Speed 5000 MHz (x2) 7000 MHz
Power (Max TDP) 375 watts 75 watts
Bandwidth 320000 MB/sec 112000 MB/sec
Texel Rate 159360 Mtexels/sec 61040 Mtexels/sec
Pixel Rate 53120 Mpixels/sec 17440 Mpixels/sec
Unified Shaders 1536 (x2) 896
Texture Mapping Units 96 (x2) 56
Render Output Units 32 (x2) 16
Bus Type GDDR5 GDDR5
Bus Width 256-bit (x2) 128-bit
Fab Process 40 nm 14 nm
Transistors 2640 million 3000 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 information (counted in MB per second) that can be moved over the external memory interface in a second. The number is worked out by multiplying the card's bus width by the speed of its memory. If it uses DDR type RAM, it must be multiplied by 2 once again. If it uses DDR5, multiply by ANOTHER 2x. The better 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 texture map elements (texels) that can be applied in one second. This figure is worked out by multiplying the total number 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 in one second.

Pixel Rate: Pixel rate is the maximum number of pixels the graphics card could possibly record to the local memory in a second - measured in millions of pixels per second. Pixel rate is calculated by multiplying the number of colour ROPs by the clock speed of the card. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel fill rate also depends on lots of other factors, most notably the memory bandwidth of the card - the lower the bandwidth is, the lower the ability to reach the max fill rate.

Display Prices

Hide Prices

Radeon HD 6990

Amazon.com

Check prices at:

Radeon RX 460

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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