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Radeon HD 7990 vs Radeon R9 290

Intro

The Radeon HD 7990 has core clock speeds of 950 MHz on the GPU, and 1500 MHz on the 3072 MB of GDDR5 memory. It features 2048 SPUs as well as 128 TAUs and 32 ROPs.

Compare those specifications to the Radeon R9 290, which features core clock speeds of 800 MHz on the GPU, and 1250 MHz on the 4096 MB of GDDR5 RAM. It features 2560 SPUs along with 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

In theory, the Radeon HD 7990 should perform much faster than the Radeon R9 290 in general. (explain)

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

Texel Rate

The Radeon HD 7990 is quite a bit (about 90%) faster with regards to anisotropic 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 just a bit (more or less 19%) better at AA than the Radeon R9 290, and able to handle higher screen resolutions better. (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: Memory bandwidth is the maximum amount of data (in units of MB per second) that can be transferred across the external memory interface in one second. The number is worked out by multiplying the interface width by its memory clock speed. If the card has DDR RAM, the result should be multiplied by 2 once again. If it uses DDR5, multiply by 4 instead. The higher the memory bandwidth, 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 amount of texture map elements (texels) that can be processed in one second. This figure is worked out by multiplying the total amount of texture units by the core speed of the chip. The better the texel rate, the better the card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels processed 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 Raster Operations Pipelines by the clock speed of the card. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel rate is also dependant on many other factors, especially the memory bandwidth - the lower the 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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