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Geforce GTX 690 vs Radeon HD 7790


Intro

The Geforce GTX 690 has a GPU core speed of 915 MHz, and the 2048 MB of GDDR5 RAM is set to run at 1502 MHz through a 256-bit bus. It also features 1536 SPUs, 128 Texture Address Units, and 32 Raster Operation Units.

Compare all of that to the Radeon HD 7790, which makes use of a 28 nm design. AMD has set the core speed at 1000 MHz. The GDDR5 RAM runs at a frequency of 1500 MHz on this particular model. It features 896 SPUs as well as 56 Texture Address Units and 16 Rasterization Operator Units.

Display Graphs

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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 13130 points
Radeon HD 7790 4330 points
Difference: 8800 (203%)

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 in theory 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 quite a bit (approximately 318%) more effective 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 using high levels of AA is important to you, then the Geforce GTX 690 is the winner, by far. (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

Geforce GTX 690

Radeon HD 7790

Specifications

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: Bandwidth is the maximum amount of data (measured in megabytes per second) that can be moved across the external memory interface in a second. It's calculated by multiplying the card's bus width by its memory speed. If the card has DDR RAM, it should be multiplied by 2 again. If it uses DDR5, multiply by ANOTHER 2x. The better the bandwidth is, the better 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 can be applied per second. This number is worked out by multiplying the total number of texture units of the card by the core speed of the chip. The higher the texel rate, the better the graphics card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels per second.

Pixel Rate: Pixel rate is the most pixels that the graphics chip could possibly record to its local memory in a second - measured in millions of pixels per second. The figure is worked out by multiplying the amount of Raster Operations Pipelines by the the core speed of the card. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel fill rate also depends on lots of other factors, especially the memory bandwidth - the lower the memory bandwidth is, the lower the potential to reach the maximum fill rate.

Geforce GTX 690

Radeon HD 7790

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