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Geforce GTX 690 vs Radeon HD 7790


Intro

The Geforce GTX 690 comes with a core clock speed 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 Texture Address Units, and 32 Raster Operation Units.

Compare that to the Radeon HD 7790, which makes use of a 28 nm design. AMD has clocked the core speed at 1000 MHz. The GDDR5 RAM runs at a speed of 1500 MHz on this card. It features 896 SPUs along with 56 TAUs and 16 ROPs.

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

Theoretically speaking, the Geforce GTX 690 is 301% quicker than the Radeon HD 7790 overall, due to its higher bandwidth. (explain)

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

Texel Rate

The Geforce GTX 690 will be a lot (more or less 318%) faster with regards to 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

The Geforce GTX 690 will be quite a bit (more or less 266%) better at FSAA than the Radeon HD 7790, and also able to handle higher resolutions better. (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 max amount of data (counted in megabytes per second) that can be transferred past the external memory interface within a second. It is calculated by multiplying the bus width by the speed of its memory. If the card has DDR type RAM, it must be multiplied by 2 again. If DDR5, multiply by 4 instead. The better the card's memory bandwidth, the better the card will be in general. It especially helps with AA, High Dynamic Range and higher screen resolutions.

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

Pixel Rate: Pixel rate is the maximum number of pixels that the graphics chip can possibly record to its local memory in one second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the amount 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 rate is also dependant on quite a few other factors, especially the memory bandwidth of the card - the lower the memory bandwidth is, the lower the ability to reach the maximum fill rate.

Geforce GTX 690

Radeon HD 7790

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