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GeForce GTX 970 vs Radeon HD 7990

Intro

The GeForce GTX 970 comes with a GPU core clock speed of 1050 MHz, and the 4096 MB of GDDR5 RAM is set to run at 1750 MHz through a 256-bit bus. It also is comprised of 1664 Stream Processors, 104 TAUs, and 64 Raster Operation Units.

Compare those specs to the Radeon HD 7990, which has a GPU core clock speed of 950 MHz, and 3072 MB of GDDR5 RAM running at 1500 MHz through a 384-bit bus. It also is made up of 2048 Stream Processors, 128 TAUs, and 32 Raster Operation 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
GeForce GTX 970 10867 points
Difference: 4653 (43%)

Zcash Mining Hash Rate

Radeon HD 7990 513 Sol/s
GeForce GTX 970 262 Sol/s
Difference: 251 (96%)

Ethereum Mining Hash Rate

Radeon HD 7990 32 Mh/s
GeForce GTX 970 19 Mh/s
Difference: 13 (68%)

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GTX 970 145 Watts
Radeon HD 7990 375 Watts
Difference: 230 Watts (159%)

Memory Bandwidth

Theoretically speaking, the Radeon HD 7990 should be a lot faster than the GeForce GTX 970 overall. (explain)

Radeon HD 7990 576000 MB/sec
GeForce GTX 970 224000 MB/sec
Difference: 352000 (157%)

Texel Rate

The Radeon HD 7990 should be much (about 123%) faster with regards to AF than the GeForce GTX 970. (explain)

Radeon HD 7990 243200 Mtexels/sec
GeForce GTX 970 109200 Mtexels/sec
Difference: 134000 (123%)

Pixel Rate

If running with a high screen resolution is important to you, then the GeForce GTX 970 is a better choice, but only just. (explain)

GeForce GTX 970 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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GeForce GTX 970

Amazon.com

Check prices at:

Radeon HD 7990

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 GeForce GTX 970 Radeon HD 7990
Manufacturer nVidia AMD
Year September 2014 April 2013
Code Name GM204-200 Malta
Memory 4096 MB 3072 MB (x2)
Core Speed 1050 MHz 950 MHz (x2)
Memory Speed 7000 MHz 6000 MHz (x2)
Power (Max TDP) 145 watts 375 watts
Bandwidth 224000 MB/sec 576000 MB/sec
Texel Rate 109200 Mtexels/sec 243200 Mtexels/sec
Pixel Rate 67200 Mpixels/sec 60800 Mpixels/sec
Unified Shaders 1664 2048 (x2)
Texture Mapping Units 104 128 (x2)
Render Output Units 64 32 (x2)
Bus Type GDDR5 GDDR5
Bus Width 256-bit 384-bit (x2)
Fab Process 28 nm 28 nm
Transistors 5200 million 4313 million
Bus PCIe 3.0 x16 PCIe 3.0 x16
DirectX Version DirectX 11.2 DirectX 11.1
OpenGL Version OpenGL 4.5 OpenGL 4.3

Memory Bandwidth: Memory bandwidth is the largest amount of information (measured in MB per second) that can be transferred across the external memory interface within a second. It's calculated by multiplying the card's interface width by the speed of its memory. If it uses DDR RAM, it must be multiplied by 2 again. If DDR5, multiply by 4 instead. The higher the memory bandwidth, the better 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 number of texture map elements (texels) that can be applied per second. This figure is calculated by multiplying the total texture units by the core clock speed of the chip. The better the texel rate, the better the video card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels applied per second.

Pixel Rate: Pixel rate is the maximum number of pixels the video card can possibly write to its local memory per second - measured in millions of pixels per second. Pixel rate is calculated by multiplying the number of Raster Operations Pipelines 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 quite a few other factors, most notably the memory bandwidth of the card - the lower the bandwidth is, the lower the ability to reach the max fill rate.

Display Prices

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GeForce GTX 970

Amazon.com

Check prices at:

Radeon HD 7990

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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