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Radeon HD 7990 vs Radeon R9 Fury X

Intro

The Radeon HD 7990 has a GPU clock speed of 950 MHz, and the 3072 MB of GDDR5 RAM is set to run at 1500 MHz through a 384-bit bus. It also features 2048 SPUs, 128 Texture Address Units, and 32 ROPs.

Compare all that to the Radeon R9 Fury X, which uses a 28 nm design. AMD has set the core speed at 1050 MHz. The HBM RAM runs at a frequency of 500 MHz on this specific card. It features 4096 SPUs as well as 256 TAUs and 64 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 7990 15520 points
Radeon R9 Fury X 14793 points
Difference: 727 (5%)

Ethereum Mining Hash Rate

Radeon HD 7990 32 Mh/s
Radeon R9 Fury X 30 Mh/s
Difference: 2 (7%)

Zcash Mining Hash Rate

Radeon HD 7990 513 Sol/s
Radeon R9 Fury X 450 Sol/s
Difference: 63 (14%)

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon R9 Fury X 275 Watts
Radeon HD 7990 375 Watts
Difference: 100 Watts (36%)

Memory Bandwidth

The Radeon HD 7990 should in theory be just a bit faster than the Radeon R9 Fury X in general. (explain)

Radeon HD 7990 576000 MB/sec
Radeon R9 Fury X 512000 MB/sec
Difference: 64000 (13%)

Texel Rate

The Radeon R9 Fury X should be a small bit (about 11%) more effective at anisotropic filtering than the Radeon HD 7990. (explain)

Radeon R9 Fury X 268800 Mtexels/sec
Radeon HD 7990 243200 Mtexels/sec
Difference: 25600 (11%)

Pixel Rate

If running with lots of anti-aliasing is important to you, then the Radeon R9 Fury X is the winner, though not by far. (explain)

Radeon R9 Fury X 67200 Mpixels/sec
Radeon HD 7990 60800 Mpixels/sec
Difference: 6400 (11%)

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

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Radeon R9 Fury X

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 7990 Radeon R9 Fury X
Manufacturer AMD AMD
Year April 2013 June 2015
Code Name Malta Fiji XT
Memory 3072 MB (x2) 4096 MB
Core Speed 950 MHz (x2) 1050 MHz
Memory Speed 6000 MHz (x2) 500 MHz
Power (Max TDP) 375 watts 275 watts
Bandwidth 576000 MB/sec 512000 MB/sec
Texel Rate 243200 Mtexels/sec 268800 Mtexels/sec
Pixel Rate 60800 Mpixels/sec 67200 Mpixels/sec
Unified Shaders 2048 (x2) 4096
Texture Mapping Units 128 (x2) 256
Render Output Units 32 (x2) 64
Bus Type GDDR5 HBM
Bus Width 384-bit (x2) 4096-bit
Fab Process 28 nm 28 nm
Transistors 4313 million 8900 million
Bus PCIe 3.0 x16 PCIe 3.0
DirectX Version DirectX 11.1 DirectX 12
OpenGL Version OpenGL 4.3 OpenGL 4.5

Memory Bandwidth: Bandwidth is the max amount of data (counted in MB per second) that can be transferred over the external memory interface in a second. It is worked out by multiplying the bus width by its memory clock speed. If the card has DDR RAM, it should be multiplied by 2 again. If it uses DDR5, multiply by 4 instead. The better the card's memory bandwidth, the better the card will be in general. It especially helps with anti-aliasing, High Dynamic Range and high resolutions.

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

Pixel Rate: Pixel rate is the maximum amount of pixels that the graphics card can possibly record to the local memory per second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the number of Raster Operations Pipelines by the the core speed of the card. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel output rate also depends on lots of other factors, most notably the memory bandwidth - the lower the memory bandwidth is, the lower the potential to reach the max fill rate.

Display Prices

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Radeon HD 7990

Amazon.com

Check prices at:

Radeon R9 Fury X

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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