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Geforce GTX 690 vs Radeon HD 7870 XT

Intro

The Geforce GTX 690 makes use of a 28 nm design. nVidia has clocked the core speed at 915 MHz. The GDDR5 RAM works at a speed of 1502 MHz on this particular card. It features 1536 SPUs as well as 128 Texture Address Units and 32 ROPs.

Compare that to the Radeon HD 7870 XT, which features GPU clock speed of 925 MHz, and 2048 MB of GDDR5 memory set to run at 1500 MHz through a 256-bit bus. It also is comprised of 1536 Stream Processors, 96 Texture Address Units, and 32 Raster Operation Units.

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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

The Geforce GTX 690, in theory, should be a lot faster than the Radeon HD 7870 XT overall. (explain)

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

Texel Rate

The Geforce GTX 690 should be much (more or less 164%) faster with regards to texture 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 should be much (more or less 98%) more effective at full screen anti-aliasing than the Radeon HD 7870 XT, and also will be able to handle higher resolutions more effectively. (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: Bandwidth is the largest amount of information (measured in megabytes per second) that can be moved over the external memory interface in one second. It's worked out by multiplying the card's bus width by the speed of its memory. If the card has DDR type RAM, the result should be multiplied by 2 again. If DDR5, multiply by 4 instead. The higher the 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 number is calculated by multiplying the total number of texture units by the core clock speed of the chip. The better this number, the better the card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels in one second.

Pixel Rate: Pixel rate is the maximum number of pixels that the graphics chip can possibly record to its local memory per second - measured in millions of pixels per second. The number is calculated by multiplying the amount of Render Output Units by the the card's 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 fill rate also depends on quite a few other factors, especially the memory bandwidth of the card - the lower the bandwidth is, the lower the potential to get to the maximum 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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