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Radeon HD 7990 vs Radeon R9 290

Intro

The Radeon HD 7990 features a GPU core speed of 950 MHz, and the 3072 MB of GDDR5 RAM runs at 1500 MHz through a 384-bit bus. It also is made up of 2048 Stream Processors, 128 Texture Address Units, and 32 Raster Operation Units.

Compare those specs to the Radeon R9 290, which comes with GPU clock speed of 800 MHz, and 4096 MB of GDDR5 RAM set to run at 1250 MHz through a 512-bit bus. It also is comprised of 2560 SPUs, 160 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 290 9876 points
Difference: 5644 (57%)

Ethereum Mining Hash Rate

Radeon HD 7990 32 Mh/s
Radeon R9 290 29 Mh/s
Difference: 3 (10%)

Zcash Mining Hash Rate

Radeon HD 7990 513 Sol/s
Radeon R9 290 283 Sol/s
Difference: 230 (81%)

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon R9 290 300 Watts
Radeon HD 7990 375 Watts
Difference: 75 Watts (25%)

Memory Bandwidth

Performance-wise, the Radeon HD 7990 should theoretically be much better than the Radeon R9 290 overall. (explain)

Radeon HD 7990 576000 MB/sec
Radeon R9 290 320000 MB/sec
Difference: 256000 (80%)

Texel Rate

The Radeon HD 7990 will be much (more or less 90%) faster with regards to texture filtering than the Radeon R9 290. (explain)

Radeon HD 7990 243200 Mtexels/sec
Radeon R9 290 128000 Mtexels/sec
Difference: 115200 (90%)

Pixel Rate

The Radeon HD 7990 is a bit (more or less 19%) more effective at FSAA than the Radeon R9 290, and should be capable of handling higher resolutions without losing too much performance. (explain)

Radeon HD 7990 60800 Mpixels/sec
Radeon R9 290 51200 Mpixels/sec
Difference: 9600 (19%)

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 R9 290

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 R9 290
Manufacturer AMD AMD
Year April 2013 November 2013
Code Name Malta Hawaii PRO
Memory 3072 MB (x2) 4096 MB
Core Speed 950 MHz (x2) 800 MHz
Memory Speed 6000 MHz (x2) 5000 MHz
Power (Max TDP) 375 watts 300 watts
Bandwidth 576000 MB/sec 320000 MB/sec
Texel Rate 243200 Mtexels/sec 128000 Mtexels/sec
Pixel Rate 60800 Mpixels/sec 51200 Mpixels/sec
Unified Shaders 2048 (x2) 2560
Texture Mapping Units 128 (x2) 160
Render Output Units 32 (x2) 64
Bus Type GDDR5 GDDR5
Bus Width 384-bit (x2) 512-bit
Fab Process 28 nm 28 nm
Transistors 4313 million 6200 million
Bus PCIe 3.0 x16 PCIe 3.0 x16
DirectX Version DirectX 11.1 DirectX 11.2
OpenGL Version OpenGL 4.3 OpenGL 4.3

Memory Bandwidth: Bandwidth is the max amount of information (measured in MB per second) that can be moved across the external memory interface in one second. The number is calculated by multiplying the card's interface width by its memory clock speed. If the card has DDR type RAM, the result should be multiplied by 2 once again. If DDR5, multiply by 4 instead. The higher the bandwidth is, the better the card will be in general. It especially helps with anti-aliasing, HDR and higher screen resolutions.

Texel Rate: Texel rate is the maximum amount of texture map elements (texels) that are processed per 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 video card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels applied in one second.

Pixel Rate: Pixel rate is the most pixels the video card can possibly write to its local memory in one second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the number of ROPs by the the core clock speed. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel rate also depends on lots of other factors, especially the memory bandwidth - 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 R9 290

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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