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Geforce GTX 690 vs Radeon HD 7790

Intro

The Geforce GTX 690 has a core clock speed of 915 MHz and a GDDR5 memory speed of 1502 MHz. It also features a 256-bit bus, and uses a 28 nm design. It is comprised of 1536 SPUs, 128 Texture Address Units, and 32 ROPs.

Compare all that to the Radeon HD 7790, which features GPU clock speed of 1000 MHz, and 1024 MB of GDDR5 RAM set to run at 1500 MHz through a 128-bit bus. It also features 896 Stream Processors, 56 TAUs, and 16 ROPs.

Display Graphs

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(No game benchmarks for this combination yet.)

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 7790 85 Watts
Geforce GTX 690 300 Watts
Difference: 215 Watts (253%)

Memory Bandwidth

The Geforce GTX 690 should theoretically perform much faster than the Radeon HD 7790 overall. (explain)

Geforce GTX 690 384512 MB/sec
Radeon HD 7790 96000 MB/sec
Difference: 288512 (301%)

Texel Rate

The Geforce GTX 690 is much (more or less 318%) better at texture filtering than the Radeon HD 7790. (explain)

Geforce GTX 690 234240 Mtexels/sec
Radeon HD 7790 56000 Mtexels/sec
Difference: 178240 (318%)

Pixel Rate

If running with a high screen resolution is important to you, then the Geforce GTX 690 is superior to the Radeon HD 7790, by a large margin. (explain)

Geforce GTX 690 58560 Mpixels/sec
Radeon HD 7790 16000 Mpixels/sec
Difference: 42560 (266%)

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

Radeon HD 7790

Amazon.com

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 7790
Manufacturer nVidia AMD
Year April 2012 March 2013
Code Name GK104 Bonaire XT
Fab Process 28 nm 28 nm
Bus PCIe 3.0 x16 PCIe 3.0 x16
Memory 2048 MB (x2) 1024 MB
Core Speed 915 MHz (x2) 1000 MHz
Shader Speed 915 MHz (x2) (N/A) MHz
Memory Speed 6008 MHz (x2) 6000 MHz
Unified Shaders 1536 (x2) 896
Texture Mapping Units 128 (x2) 56
Render Output Units 32 (x2) 16
Bus Type GDDR5 GDDR5
Bus Width 256-bit (x2) 128-bit
DirectX Version DirectX 11.0 DirectX 11.1
OpenGL Version OpenGL 4.2 OpenGL 4.3
Power (Max TDP) 300 watts 85 watts
Shader Model 5.0 5.0
Bandwidth 384512 MB/sec 96000 MB/sec
Texel Rate 234240 Mtexels/sec 56000 Mtexels/sec
Pixel Rate 58560 Mpixels/sec 16000 Mpixels/sec

Memory Bandwidth: Bandwidth is the largest amount of information (in units of megabytes per second) that can be transported over the external memory interface in a second. It is worked out by multiplying the bus width by its memory clock speed. If it uses DDR type memory, the result should be multiplied by 2 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 anti-aliasing, HDR and high resolutions.

Texel Rate: Texel rate is the maximum texture map elements (texels) that are applied in one second. This figure is worked out by multiplying the total amount of texture units by the core speed of the chip. The higher this number, the better the graphics card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels per second.

Pixel Rate: Pixel rate is the maximum number of pixels that the graphics card could possibly write to its local memory in a second - measured in millions of pixels per second. The figure is worked out by multiplying the number of Raster Operations Pipelines by the clock speed of the card. ROPs (Raster Operations Pipelines - sometimes also referred to as Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel output rate also depends on many other factors, most notably the memory bandwidth - the lower the bandwidth is, the lower the potential to reach the max fill rate.

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