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Geforce GTX 690 vs Radeon HD 7950

Intro

The Geforce GTX 690 features a GPU core clock speed of 915 MHz, and the 2048 MB of GDDR5 memory runs at 1502 MHz through a 256-bit bus. It also is comprised of 1536 SPUs, 128 TAUs, and 32 ROPs.

Compare those specifications to the Radeon HD 7950, which features a clock frequency of 800 MHz and a GDDR5 memory speed of 1250 MHz. It also makes use of a 384-bit memory bus, and makes use of a 28 nm design. It features 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.

3DMark Fire Strike Graphics Score

Geforce GTX 690 13111 points
Radeon HD 7950 7731 points
Difference: 5380 (70%)

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 7950 200 Watts
Geforce GTX 690 300 Watts
Difference: 100 Watts (50%)

Memory Bandwidth

Performance-wise, the Geforce GTX 690 should theoretically be much better than the Radeon HD 7950 overall. (explain)

Geforce GTX 690 384512 MB/sec
Radeon HD 7950 240000 MB/sec
Difference: 144512 (60%)

Texel Rate

The Geforce GTX 690 should be much (more or less 161%) more effective at texture filtering than the Radeon HD 7950. (explain)

Geforce GTX 690 234240 Mtexels/sec
Radeon HD 7950 89600 Mtexels/sec
Difference: 144640 (161%)

Pixel Rate

If running with lots of anti-aliasing is important to you, then the Geforce GTX 690 is superior to the Radeon HD 7950, by far. (explain)

Geforce GTX 690 58560 Mpixels/sec
Radeon HD 7950 25600 Mpixels/sec
Difference: 32960 (129%)

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 690

Amazon.com

Check prices at:

Radeon HD 7950

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 690 Radeon HD 7950
Manufacturer nVidia AMD
Year April 2012 January 2012
Code Name GK104 Tahiti Pro
Memory 2048 MB (x2) 1536 MB
Core Speed 915 MHz (x2) 800 MHz
Memory Speed 6008 MHz (x2) 5000 MHz
Power (Max TDP) 300 watts 200 watts
Bandwidth 384512 MB/sec 240000 MB/sec
Texel Rate 234240 Mtexels/sec 89600 Mtexels/sec
Pixel Rate 58560 Mpixels/sec 25600 Mpixels/sec
Unified Shaders 1536 (x2) 1792
Texture Mapping Units 128 (x2) 112
Render Output Units 32 (x2) 32
Bus Type GDDR5 GDDR5
Bus Width 256-bit (x2) 384-bit
Fab Process 28 nm 28 nm
Transistors 3540 million 4313 million
Bus PCIe 3.0 x16 PCIe 3.0 x16
DirectX Version DirectX 11.0 DirectX 11.1
OpenGL Version OpenGL 4.2 OpenGL 4.2

Memory Bandwidth: Memory bandwidth is the largest amount of data (in units of megabytes per second) that can be transferred across the external memory interface within a second. It is worked out by multiplying the interface width by the speed of its memory. In the case of DDR memory, it should be multiplied by 2 again. If it uses DDR5, multiply by ANOTHER 2x. The higher the card's memory bandwidth, the better the card will be in general. It especially helps with AA, HDR and higher screen resolutions.

Texel Rate: Texel rate is the maximum number of texture map elements (texels) that are processed per second. This figure is worked out by multiplying the total number of texture units of the card by the core 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 processed in one second.

Pixel Rate: Pixel rate is the most pixels that the graphics card can possibly record to the local memory in one second - measured in millions of pixels per second. Pixel rate is calculated by multiplying the amount of colour ROPs by the the core speed of the card. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel output rate also depends on lots of other factors, most notably the memory bandwidth - the lower the memory bandwidth is, the lower the potential to reach the maximum fill rate.

Display Prices

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Geforce GTX 690

Amazon.com

Check prices at:

Radeon HD 7950

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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