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Geforce GTX 690 vs Radeon HD 7870 XT

Intro

The Geforce GTX 690 features a clock speed of 915 MHz and a GDDR5 memory speed of 1502 MHz. It also makes use of a 256-bit bus, and makes use of a 28 nm design. It features 1536 SPUs, 128 Texture Address Units, and 32 Raster Operation Units.

Compare that to the Radeon HD 7870 XT, which makes use of a 28 nm design. AMD has clocked the core speed at 925 MHz. The GDDR5 memory is set to run at a speed of 1500 MHz on this card. It features 1536 SPUs as well as 96 TAUs and 32 ROPs.

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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 7870 XT 6390 points
Difference: 6721 (105%)

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 7870 XT 185 Watts
Geforce GTX 690 300 Watts
Difference: 115 Watts (62%)

Memory Bandwidth

Theoretically speaking, the Geforce GTX 690 will be 100% quicker than the Radeon HD 7870 XT overall, due to its greater bandwidth. (explain)

Geforce GTX 690 384512 MB/sec
Radeon HD 7870 XT 192000 MB/sec
Difference: 192512 (100%)

Texel Rate

The Geforce GTX 690 is much (about 164%) more effective at anisotropic filtering than the Radeon HD 7870 XT. (explain)

Geforce GTX 690 234240 Mtexels/sec
Radeon HD 7870 XT 88800 Mtexels/sec
Difference: 145440 (164%)

Pixel Rate

The Geforce GTX 690 will be much (approximately 98%) better at full screen anti-aliasing than the Radeon HD 7870 XT, and will be able to handle higher resolutions better. (explain)

Geforce GTX 690 58560 Mpixels/sec
Radeon HD 7870 XT 29600 Mpixels/sec
Difference: 28960 (98%)

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

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Radeon HD 7870 XT

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 7870 XT
Manufacturer nVidia AMD
Year April 2012 November 2012
Code Name GK104 Tahiti LE
Memory 2048 MB (x2) 2048 MB
Core Speed 915 MHz (x2) 925 MHz
Memory Speed 6008 MHz (x2) 6000 MHz
Power (Max TDP) 300 watts 185 watts
Bandwidth 384512 MB/sec 192000 MB/sec
Texel Rate 234240 Mtexels/sec 88800 Mtexels/sec
Pixel Rate 58560 Mpixels/sec 29600 Mpixels/sec
Unified Shaders 1536 (x2) 1536
Texture Mapping Units 128 (x2) 96
Render Output Units 32 (x2) 32
Bus Type GDDR5 GDDR5
Bus Width 256-bit (x2) 256-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 4.3

Memory Bandwidth: Memory bandwidth is the max amount of information (in units of MB per second) that can be moved across the external memory interface in a second. It's calculated by multiplying the bus width by the speed of its memory. If it uses DDR RAM, it should be multiplied by 2 once again. If DDR5, multiply by ANOTHER 2x. The better the bandwidth is, 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 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 higher the texel rate, the better the graphics card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels processed in a second.

Pixel Rate: Pixel rate is the maximum amount of pixels the graphics card can possibly record to the local memory per second - measured in millions of pixels per second. Pixel rate is calculated by multiplying the amount of Raster Operations Pipelines by the the core speed of the card. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel rate also depends on lots of other factors, especially the memory bandwidth - the lower the memory bandwidth is, the lower the ability to get to the max fill rate.

Display Prices

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Geforce GTX 690

Amazon.com

Check prices at:

Radeon HD 7870 XT

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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