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Geforce GTX 690 vs Radeon HD 7790


The Geforce GTX 690 comes with a clock frequency of 915 MHz and a GDDR5 memory frequency of 1502 MHz. It also features a 256-bit bus, and uses a 28 nm design. It is made up of 1536 SPUs, 128 TAUs, and 32 ROPs.

Compare those specifications to the Radeon HD 7790, which features a clock speed of 1000 MHz and a GDDR5 memory frequency of 1500 MHz. It also features a 128-bit memory bus, and makes use of a 28 nm design. It is made up of 896 SPUs, 56 TAUs, and 16 Raster Operation Units.

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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

In theory, the Geforce GTX 690 should perform a lot 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 should be a lot (approximately 318%) more effective at anisotropic filtering than the Radeon HD 7790. (explain)

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

Pixel Rate

The Geforce GTX 690 will be a lot (about 266%) better at AA than the Radeon HD 7790, and also should be able to handle higher resolutions without losing too much performance. (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

Radeon HD 7790

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.


Display 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
Memory 2048 MB (x2) 1024 MB
Core Speed 915 MHz (x2) 1000 MHz
Memory Speed 6008 MHz (x2) 6000 MHz
Power (Max TDP) 300 watts 85 watts
Bandwidth 384512 MB/sec 96000 MB/sec
Texel Rate 234240 Mtexels/sec 56000 Mtexels/sec
Pixel Rate 58560 Mpixels/sec 16000 Mpixels/sec
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
Fab Process 28 nm 28 nm
Transistors 3540 million 2080 million
Bus PCIe 3.0 x16 PCIe 3.0 x16
DirectX Version DirectX 11.0 DirectX 11.1
OpenGL Version OpenGL 4.2 OpenGL 4.3

Memory Bandwidth: Memory bandwidth is the maximum amount of data (in units of MB per second) that can be transported past the external memory interface in a second. It's worked out by multiplying the card's bus width by the speed of its memory. If the card has DDR memory, it must be multiplied by 2 once again. If it uses DDR5, multiply by 4 instead. The better the memory bandwidth, 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 figure is calculated by multiplying the total texture units of the card by the core speed of the chip. The higher this number, the better the card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels in one second.

Pixel Rate: Pixel rate is the maximum amount of pixels that the graphics chip could possibly record to the local memory per second - measured in millions of pixels per second. The figure is calculated by multiplying the amount of ROPs by the clock speed of the card. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel rate is also dependant on quite a few other factors, especially the memory bandwidth - the lower the memory bandwidth is, the lower the ability to reach the max fill rate.


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