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Geforce GTX 780 vs Radeon HD 5870

Intro

The Geforce GTX 780 has a GPU core clock speed of 863 MHz, and the 3072 MB of GDDR5 RAM runs at 1502 MHz through a 384-bit bus. It also is made up of 2304 Stream Processors, 192 TAUs, and 48 Raster Operation Units.

Compare all of that to the Radeon HD 5870, which has a clock frequency of 850 MHz and a GDDR5 memory frequency of 1200 MHz. It also uses a 256-bit bus, and uses a 40 nm design. It is comprised of 1600(320x5) SPUs, 80 Texture Address Units, and 32 ROPs.

Display Graphs

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(No game benchmarks for this combination yet.)

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

Theoretically speaking, the Geforce GTX 780 is 88% quicker than the Radeon HD 5870 overall, because of its higher data rate. (explain)

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

Texel Rate

The Geforce GTX 780 should be a lot (about 144%) better at AF than the Radeon HD 5870. (explain)

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

Pixel Rate

The Geforce GTX 780 will be much (more or less 52%) better at AA than the Radeon HD 5870, and should be capable of handling higher screen resolutions more effectively. (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
Fab Process 28 nm 40 nm
Bus PCIe 3.0 x16 PCIe 2.1 x16
Memory 3072 MB 1024 MB
Core Speed 863 MHz 850 MHz
Shader Speed 863 MHz (N/A) MHz
Memory Speed 6008 MHz 4800 MHz
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
DirectX Version DirectX 11.0 DirectX 11
OpenGL Version OpenGL 4.3 OpenGL 3.2
Power (Max TDP) 250 watts 188 watts
Shader Model 5.0 5.0
Bandwidth 288384 MB/sec 153600 MB/sec
Texel Rate 165696 Mtexels/sec 68000 Mtexels/sec
Pixel Rate 41424 Mpixels/sec 27200 Mpixels/sec

Memory Bandwidth: Memory bandwidth is the maximum amount of data (measured in MB per second) that can be transported across the external memory interface in a second. It's calculated by multiplying the bus width by the speed of its memory. If the card has DDR RAM, the result should be multiplied by 2 again. If it uses DDR5, multiply by 4 instead. The better the bandwidth is, the better the card will be in general. It especially helps with AA, High Dynamic Range and high 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 texture units by the core speed of the chip. The better the texel rate, the better the graphics card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels applied in a second.

Pixel Rate: Pixel rate is the maximum number of pixels that the graphics chip can possibly record to the local memory per second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the amount of ROPs 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 output rate also depends on lots of other factors, most notably the memory bandwidth of the card - the lower the memory bandwidth is, the lower the ability to get to the maximum fill rate.

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