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Geforce GTX 780 vs Radeon HD 7950


The Geforce GTX 780 features a GPU clock speed of 863 MHz, and the 3072 MB of GDDR5 memory is set to run at 1502 MHz through a 384-bit bus. It also is comprised of 2304 SPUs, 192 TAUs, and 48 Raster Operation Units.

Compare that to the Radeon HD 7950, which features a core clock speed of 800 MHz and a GDDR5 memory speed of 1250 MHz. It also uses a 384-bit memory bus, and makes use of a 28 nm design. It features 1792 SPUs, 112 Texture Address Units, and 32 Raster Operation Units.

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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 780 10067 points
Radeon HD 7950 7731 points
Difference: 2336 (30%)

Ethereum Mining Hash Rate

Radeon HD 7950 21 Mh/s
Geforce GTX 780 20 Mh/s
Difference: 1 (5%)

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 7950 200 Watts
Geforce GTX 780 250 Watts
Difference: 50 Watts (25%)

Memory Bandwidth

In theory, the Geforce GTX 780 is 20% faster than the Radeon HD 7950 overall, because of its higher data rate. (explain)

Geforce GTX 780 288384 MB/sec
Radeon HD 7950 240000 MB/sec
Difference: 48384 (20%)

Texel Rate

The Geforce GTX 780 will be quite a bit (more or less 85%) more effective at anisotropic filtering than the Radeon HD 7950. (explain)

Geforce GTX 780 165696 Mtexels/sec
Radeon HD 7950 89600 Mtexels/sec
Difference: 76096 (85%)

Pixel Rate

The Geforce GTX 780 will be a lot (about 62%) more effective at full screen anti-aliasing than the Radeon HD 7950, and able to handle higher resolutions better. (explain)

Geforce GTX 780 41424 Mpixels/sec
Radeon HD 7950 25600 Mpixels/sec
Difference: 15824 (62%)

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

Geforce GTX 780

Radeon HD 7950


Display Specifications

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Model Geforce GTX 780 Radeon HD 7950
Manufacturer nVidia AMD
Year May 2013 January 2012
Code Name GK110 Tahiti Pro
Memory 3072 MB 1536 MB
Core Speed 863 MHz 800 MHz
Memory Speed 6008 MHz 5000 MHz
Power (Max TDP) 250 watts 200 watts
Bandwidth 288384 MB/sec 240000 MB/sec
Texel Rate 165696 Mtexels/sec 89600 Mtexels/sec
Pixel Rate 41424 Mpixels/sec 25600 Mpixels/sec
Unified Shaders 2304 1792
Texture Mapping Units 192 112
Render Output Units 48 32
Bus Type GDDR5 GDDR5
Bus Width 384-bit 384-bit
Fab Process 28 nm 28 nm
Transistors 7080 million 4313 million
Bus PCIe 3.0 x16 PCIe 3.0 x16
DirectX Version DirectX 11.0 DirectX 11.1
OpenGL Version OpenGL 4.3 OpenGL 4.2

Memory Bandwidth: Bandwidth is the largest amount of information (in units of megabytes per second) that can be transferred over the external memory interface in a second. It's calculated by multiplying the bus width by its memory clock speed. If it uses DDR type RAM, it must be multiplied by 2 again. If it uses DDR5, multiply by ANOTHER 2x. The better the bandwidth is, 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 texture map elements (texels) that can be processed in one second. This figure is calculated 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 processed per second.

Pixel Rate: Pixel rate is the maximum amount of pixels that the graphics card can possibly record to the local memory in a second - measured in millions of pixels per second. The figure is calculated by multiplying the amount of ROPs by the the core clock speed. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel rate is also dependant on quite a few other factors, most notably the memory bandwidth - the lower the memory bandwidth is, the lower the potential to get to the maximum fill rate.

Geforce GTX 780

Radeon HD 7950


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