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Geforce GTX 690 vs Radeon HD 4870 X2

Intro

The Geforce GTX 690 makes use of a 28 nm design. nVidia has clocked the core frequency at 915 MHz. The GDDR5 memory 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 those specifications to the Radeon HD 4870 X2, which has core speeds of 750 MHz on the GPU, and 900 MHz on the 1024 MB of GDDR5 memory. It features 800(160x5) SPUs as well as 40 TAUs and 16 Rasterization Operator Units.

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Geforce GTX 690 300 Watts
Radeon HD 4870 X2 350 Watts
Difference: 50 Watts (17%)

Memory Bandwidth

The Geforce GTX 690 should theoretically be a lot faster than the Radeon HD 4870 X2 in general. (explain)

Geforce GTX 690 384512 MB/sec
Radeon HD 4870 X2 230400 MB/sec
Difference: 154112 (67%)

Texel Rate

The Geforce GTX 690 will be quite a bit (about 290%) faster with regards to texture filtering than the Radeon HD 4870 X2. (explain)

Geforce GTX 690 234240 Mtexels/sec
Radeon HD 4870 X2 60000 Mtexels/sec
Difference: 174240 (290%)

Pixel Rate

If running with lots of anti-aliasing is important to you, then the Geforce GTX 690 is superior to the Radeon HD 4870 X2, by a large margin. (explain)

Geforce GTX 690 58560 Mpixels/sec
Radeon HD 4870 X2 24000 Mpixels/sec
Difference: 34560 (144%)

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

Check prices at:

Radeon HD 4870 X2

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 4870 X2
Manufacturer nVidia AMD
Year April 2012 Aug 12, 2008
Code Name GK104 R700
Memory 2048 MB (x2) 1024 MB (x2)
Core Speed 915 MHz (x2) 750 MHz (x2)
Memory Speed 6008 MHz (x2) 3600 MHz (x2)
Power (Max TDP) 300 watts 350 watts
Bandwidth 384512 MB/sec 230400 MB/sec
Texel Rate 234240 Mtexels/sec 60000 Mtexels/sec
Pixel Rate 58560 Mpixels/sec 24000 Mpixels/sec
Unified Shaders 1536 (x2) 800(160x5) (x2)
Texture Mapping Units 128 (x2) 40 (x2)
Render Output Units 32 (x2) 16 (x2)
Bus Type GDDR5 GDDR5
Bus Width 256-bit (x2) 256-bit (x2)
Fab Process 28 nm 55 nm
Transistors 3540 million 956 million
Bus PCIe 3.0 x16 PCIe 2.0 x16 (PCIe bridge)
DirectX Version DirectX 11.0 DirectX 10.1
OpenGL Version OpenGL 4.2 OpenGL 3.0

Memory Bandwidth: Bandwidth is the largest 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 card's bus width by the speed of its memory. If it uses DDR type RAM, it must be multiplied by 2 once again. If DDR5, multiply by ANOTHER 2x. The better the memory bandwidth, the better the card will be in general. It especially helps with anti-aliasing, HDR and higher screen resolutions.

Texel Rate: Texel rate is the maximum texture map elements (texels) that can be applied per second. This figure is calculated by multiplying the total amount of 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 per second.

Pixel Rate: Pixel rate is the maximum amount of pixels that the graphics card can possibly write to its local memory in one second - measured in millions of pixels per second. The figure is calculated by multiplying the number of Render Output Units by the the card's clock speed. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel output rate also depends on quite a few other factors, most notably the memory bandwidth of the card - the lower the bandwidth is, the lower the ability to reach the max fill rate.

Display Prices

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Geforce GTX 690

Amazon.com

Check prices at:

Radeon HD 4870 X2

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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