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Radeon HD 7990 vs Radeon R9 290X

Intro

The Radeon HD 7990 uses a 28 nm design. AMD has clocked the core speed at 950 MHz. The GDDR5 RAM runs at a frequency of 1500 MHz on this model. It features 2048 SPUs along with 128 TAUs and 32 ROPs.

Compare that to the Radeon R9 290X, which has clock speeds of 800 MHz on the GPU, and 1250 MHz on the 4096 MB of GDDR5 memory. It features 2816 SPUs as well as 176 TAUs and 64 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 R9 290X 10420 points
Difference: 5100 (49%)

Ethereum Mining Hash Rate

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

Zcash Mining Hash Rate

Radeon HD 7990 513 Sol/s
Radeon R9 290X 369 Sol/s
Difference: 144 (39%)

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

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

Memory Bandwidth

The Radeon HD 7990 should in theory be a lot faster than the Radeon R9 290X in general. (explain)

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

Texel Rate

The Radeon HD 7990 should be quite a bit (more or less 73%) faster with regards to texture filtering than the Radeon R9 290X. (explain)

Radeon HD 7990 243200 Mtexels/sec
Radeon R9 290X 140800 Mtexels/sec
Difference: 102400 (73%)

Pixel Rate

The Radeon HD 7990 will be a little bit (approximately 19%) faster with regards to AA than the Radeon R9 290X, and will be capable of handling higher resolutions without losing too much performance. (explain)

Radeon HD 7990 60800 Mpixels/sec
Radeon R9 290X 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

Radeon HD 7990

Radeon R9 290X

Specifications

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Model Radeon HD 7990 Radeon R9 290X
Manufacturer AMD AMD
Year April 2013 October 2013
Code Name Malta Hawaii XT
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 140800 Mtexels/sec
Pixel Rate 60800 Mpixels/sec 51200 Mpixels/sec
Unified Shaders 2048 (x2) 2816
Texture Mapping Units 128 (x2) 176
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 maximum amount of information (measured in MB per second) that can be transferred across the external memory interface in a second. It is worked out by multiplying the card's interface width by its memory clock speed. If the card has DDR type RAM, it should be multiplied by 2 once again. If DDR5, multiply by ANOTHER 2x. The higher the bandwidth is, the faster 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 number of texture map elements (texels) that can be processed per second. This 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 graphics 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 maximum amount of pixels the graphics card could possibly write to its local memory per second - measured in millions of pixels per second. The number is worked out by multiplying the amount of Raster Operations Pipelines by the the core speed of the card. ROPs (Raster Operations Pipelines - sometimes also referred to as Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel rate also depends on many other factors, especially the memory bandwidth of the card - the lower the bandwidth is, the lower the ability to reach the max fill rate.

Radeon HD 7990

Radeon R9 290X

Comments

One Response to “Radeon HD 7990 vs Radeon R9 290X”
sam says:

hd 7990 radeon is the best card

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