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Radeon HD 7990 vs Radeon RX 470

Intro

The Radeon HD 7990 comes with a clock speed of 950 MHz and a GDDR5 memory frequency of 1500 MHz. It also uses a 384-bit memory bus, and makes use of a 28 nm design. It is comprised of 2048 SPUs, 128 Texture Address Units, and 32 ROPs.

Compare all of that to the Radeon RX 470, which makes use of a 14 nm design. AMD has clocked the core frequency at 926 MHz. The GDDR5 memory runs at a speed of 1650 MHz on this particular card. It features 2048 SPUs along with 128 Texture Address Units and 32 Rasterization Operator Units.

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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 7990 15520 points
Radeon RX 470 11756 points
Difference: 3764 (32%)

Ethereum Mining Hash Rate

Radeon HD 7990 32 Mh/s
Radeon RX 470 26 Mh/s
Difference: 6 (23%)

Zcash Mining Hash Rate

Radeon HD 7990 513 Sol/s
Radeon RX 470 289 Sol/s
Difference: 224 (78%)

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon RX 470 120 Watts
Radeon HD 7990 375 Watts
Difference: 255 Watts (213%)

Memory Bandwidth

As far as performance goes, the Radeon HD 7990 should theoretically be quite a bit better than the Radeon RX 470 in general. (explain)

Radeon HD 7990 576000 MB/sec
Radeon RX 470 211200 MB/sec
Difference: 364800 (173%)

Texel Rate

The Radeon HD 7990 will be much (about 105%) better at anisotropic filtering than the Radeon RX 470. (explain)

Radeon HD 7990 243200 Mtexels/sec
Radeon RX 470 118528 Mtexels/sec
Difference: 124672 (105%)

Pixel Rate

If using lots of anti-aliasing is important to you, then the Radeon HD 7990 is a better choice, by far. (explain)

Radeon HD 7990 60800 Mpixels/sec
Radeon RX 470 29632 Mpixels/sec
Difference: 31168 (105%)

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 7990

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.

Specifications

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Model Radeon HD 7990 Radeon RX 470
Manufacturer AMD AMD
Year April 2013 August 2016
Code Name Malta Polaris 10
Memory 3072 MB (x2) 8192 MB
Core Speed 950 MHz (x2) 926 MHz
Memory Speed 6000 MHz (x2) 6600 MHz
Power (Max TDP) 375 watts 120 watts
Bandwidth 576000 MB/sec 211200 MB/sec
Texel Rate 243200 Mtexels/sec 118528 Mtexels/sec
Pixel Rate 60800 Mpixels/sec 29632 Mpixels/sec
Unified Shaders 2048 (x2) 2048
Texture Mapping Units 128 (x2) 128
Render Output Units 32 (x2) 32
Bus Type GDDR5 GDDR5
Bus Width 384-bit (x2) 256-bit
Fab Process 28 nm 14 nm
Transistors 4313 million 5700 million
Bus PCIe 3.0 x16 PCIe 3.0 x16
DirectX Version DirectX 11.1 DirectX 12.0
OpenGL Version OpenGL 4.3 OpenGL 4.5

Memory Bandwidth: Memory bandwidth is the maximum amount of data (counted in megabytes per second) that can be moved across the external memory interface within a second. The number is worked out by multiplying the interface width by its memory clock speed. In the case of DDR 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 AA, High Dynamic Range and higher screen resolutions.

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

Pixel Rate: Pixel rate is the maximum amount of pixels that the graphics chip 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 number of Raster Operations Pipelines by the the card's clock speed. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel rate is also dependant on lots of other factors, most notably the memory bandwidth of the card - the lower the memory bandwidth is, the lower the ability to get to the max fill rate.

Display Prices

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Radeon HD 7990

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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