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Geforce GTX 780 vs Radeon HD 5870

Intro

The Geforce GTX 780 uses a 28 nm design. nVidia has clocked the core speed at 863 MHz. The GDDR5 RAM works at a frequency of 1502 MHz on this particular card. It features 2304 SPUs along with 192 Texture Address Units and 48 ROPs.

Compare those specs to the Radeon HD 5870, which makes use of a 40 nm design. AMD has clocked the core speed at 850 MHz. The GDDR5 RAM works at a frequency of 1200 MHz on this card. It features 1600(320x5) SPUs as well as 80 Texture Address Units and 32 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 5870 188 Watts
Geforce GTX 780 250 Watts
Difference: 62 Watts (33%)

Memory Bandwidth

The Geforce GTX 780 should theoretically be a lot faster than the Radeon HD 5870 overall. (explain)

Geforce GTX 780 288384 MB/sec
Radeon HD 5870 153600 MB/sec
Difference: 134784 (88%)

Texel Rate

The Geforce GTX 780 will be much (about 144%) more effective at anisotropic filtering than the Radeon HD 5870. (explain)

Geforce GTX 780 165696 Mtexels/sec
Radeon HD 5870 68000 Mtexels/sec
Difference: 97696 (144%)

Pixel Rate

If using high levels of AA is important to you, then the Geforce GTX 780 is the winner, and very much so. (explain)

Geforce GTX 780 41424 Mpixels/sec
Radeon HD 5870 27200 Mpixels/sec
Difference: 14224 (52%)

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.

Price Comparison

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Geforce GTX 780

Amazon.com

Radeon HD 5870

Amazon.com

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 780 Radeon HD 5870
Manufacturer nVidia AMD
Year May 2013 September 23, 2009
Code Name GK110 Cypress XT
Memory 3072 MB 1024 MB
Core Speed 863 MHz 850 MHz
Memory Speed 6008 MHz 4800 MHz
Power (Max TDP) 250 watts 188 watts
Bandwidth 288384 MB/sec 153600 MB/sec
Texel Rate 165696 Mtexels/sec 68000 Mtexels/sec
Pixel Rate 41424 Mpixels/sec 27200 Mpixels/sec
Unified Shaders 2304 1600(320x5)
Texture Mapping Units 192 80
Render Output Units 48 32
Bus Type GDDR5 GDDR5
Bus Width 384-bit 256-bit
Fab Process 28 nm 40 nm
Transistors 7080 million 2154 million
Bus PCIe 3.0 x16 PCIe 2.1 x16
DirectX Version DirectX 11.0 DirectX 11
OpenGL Version OpenGL 4.3 OpenGL 3.2

Memory Bandwidth: Bandwidth is the max amount of data (measured in megabytes per second) that can be moved across the external memory interface within a second. The number is calculated by multiplying the card's bus width by its memory speed. In the case of DDR type memory, it must be multiplied by 2 again. If DDR5, multiply by ANOTHER 2x. The higher the memory bandwidth, the faster the card will be in general. It especially helps with AA, High Dynamic Range and high resolutions.

Texel Rate: Texel rate is the maximum number of texture map elements (texels) that can be processed per second. This figure is worked out by multiplying the total number of texture units by the core clock speed of the chip. The higher 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 most 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 ROPs by the the core clock speed. ROPs (Raster Operations Pipelines - sometimes also referred to as Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel output rate is also dependant on lots of other factors, most notably the memory bandwidth - the lower the bandwidth is, the lower the ability to get to the max fill rate.

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