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GeForce GTX 970 vs Radeon HD 7950 3GB

Intro

The GeForce GTX 970 uses a 28 nm design. nVidia has set the core frequency at 1050 MHz. The GDDR5 memory works at a frequency of 1750 MHz on this model. It features 1664 SPUs as well as 104 Texture Address Units and 64 Rasterization Operator Units.

Compare those specifications to the Radeon HD 7950 3GB, which comes with a core clock frequency of 800 MHz and a GDDR5 memory frequency of 1250 MHz. It also uses a 384-bit bus, and uses a 28 nm design. It is made up of 1792 SPUs, 112 Texture Address Units, 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.

Zcash Mining Hash Rate

GeForce GTX 970 262 Sol/s
Radeon HD 7950 3GB 229 Sol/s
Difference: 33 (14%)

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GTX 970 145 Watts
Radeon HD 7950 3GB 200 Watts
Difference: 55 Watts (38%)

Memory Bandwidth

In theory, the Radeon HD 7950 3GB should be 7% quicker than the GeForce GTX 970 overall, because of its higher data rate. (explain)

Radeon HD 7950 3GB 240000 MB/sec
GeForce GTX 970 224000 MB/sec
Difference: 16000 (7%)

Texel Rate

The GeForce GTX 970 will be a lot (about 22%) faster with regards to AF than the Radeon HD 7950 3GB. (explain)

GeForce GTX 970 109200 Mtexels/sec
Radeon HD 7950 3GB 89600 Mtexels/sec
Difference: 19600 (22%)

Pixel Rate

The GeForce GTX 970 will be much (about 163%) better at AA than the Radeon HD 7950 3GB, and able to handle higher screen resolutions without slowing down too much. (explain)

GeForce GTX 970 67200 Mpixels/sec
Radeon HD 7950 3GB 25600 Mpixels/sec
Difference: 41600 (163%)

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.

Price Comparison

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GeForce GTX 970

Amazon.com

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Radeon HD 7950 3GB

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 GeForce GTX 970 Radeon HD 7950 3GB
Manufacturer nVidia AMD
Year September 2014 January 2012
Code Name GM204-200 Tahiti Pro
Memory 4096 MB 3072 MB
Core Speed 1050 MHz 800 MHz
Memory Speed 7000 MHz 5000 MHz
Power (Max TDP) 145 watts 200 watts
Bandwidth 224000 MB/sec 240000 MB/sec
Texel Rate 109200 Mtexels/sec 89600 Mtexels/sec
Pixel Rate 67200 Mpixels/sec 25600 Mpixels/sec
Unified Shaders 1664 1792
Texture Mapping Units 104 112
Render Output Units 64 32
Bus Type GDDR5 GDDR5
Bus Width 256-bit 384-bit
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 4.2

Memory Bandwidth: Bandwidth is the largest amount of information (in units of megabytes per second) that can be transferred over the external memory interface in a second. The number is worked out by multiplying the card's interface width by the speed of its memory. If the card has DDR type RAM, the result should be multiplied by 2 again. If DDR5, multiply by ANOTHER 2x. The higher 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 number of texture map elements (texels) that are processed in one second. This figure is calculated by multiplying the total texture units by the core speed of the chip. The better the texel rate, the better the graphics card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels in a second.

Pixel Rate: Pixel rate is the maximum amount of pixels that the graphics card could possibly write to the local memory per second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the number of Render Output Units by the the core clock speed. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel output rate is also dependant on quite a few other factors, most notably the memory bandwidth of the card - the lower the memory bandwidth is, the lower the ability to get to the max fill rate.

Display Prices

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GeForce GTX 970

Amazon.com

Check prices at:

Radeon HD 7950 3GB

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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