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Geforce GTX 680 vs Radeon HD 7950


The Geforce GTX 680 features core speeds of 1006 MHz on the GPU, and 1502 MHz on the 2048 MB of GDDR5 RAM. It features 1536 SPUs along with 128 TAUs and 32 ROPs.

Compare those specs to the Radeon HD 7950, which has GPU core speed of 800 MHz, and 1536 MB of GDDR5 RAM running at 1250 MHz through a 384-bit bus. It also is comprised of 1792 SPUs, 112 TAUs, and 32 ROPs.

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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

Radeon HD 7950 7762 points
Geforce GTX 680 7642 points
Difference: 120 (2%)

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Geforce GTX 680 195 Watts
Radeon HD 7950 200 Watts
Difference: 5 Watts (3%)

Memory Bandwidth

Theoretically speaking, the Radeon HD 7950 will be 25% quicker than the Geforce GTX 680 in general, due to its higher bandwidth. (explain)

Radeon HD 7950 240000 MB/sec
Geforce GTX 680 192256 MB/sec
Difference: 47744 (25%)

Texel Rate

The Geforce GTX 680 should be quite a bit (approximately 44%) faster with regards to AF than the Radeon HD 7950. (explain)

Geforce GTX 680 128768 Mtexels/sec
Radeon HD 7950 89600 Mtexels/sec
Difference: 39168 (44%)

Pixel Rate

If running with high levels of AA is important to you, then the Geforce GTX 680 is superior to the Radeon HD 7950, and very much so. (explain)

Geforce GTX 680 32192 Mpixels/sec
Radeon HD 7950 25600 Mpixels/sec
Difference: 6592 (26%)

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 680

Radeon HD 7950

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.


Display Specifications

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Model Geforce GTX 680 Radeon HD 7950
Manufacturer nVidia AMD
Year March 2012 January 2012
Code Name GK104 Tahiti Pro
Memory 2048 MB 1536 MB
Core Speed 1006 MHz 800 MHz
Memory Speed 6008 MHz 5000 MHz
Power (Max TDP) 195 watts 200 watts
Bandwidth 192256 MB/sec 240000 MB/sec
Texel Rate 128768 Mtexels/sec 89600 Mtexels/sec
Pixel Rate 32192 Mpixels/sec 25600 Mpixels/sec
Unified Shaders 1536 1792
Texture Mapping Units 128 112
Render Output Units 32 32
Bus Type GDDR5 GDDR5
Bus Width 256-bit 384-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 4.2

Memory Bandwidth: Memory bandwidth is the max amount of data (counted in megabytes per second) that can be transferred across the external memory interface within a second. It is calculated by multiplying the interface width by its memory speed. In the case of DDR RAM, the result should be multiplied by 2 again. If it uses DDR5, multiply by ANOTHER 2x. The better the memory bandwidth, the faster the card will be in general. It especially helps with AA, HDR and higher screen resolutions.

Texel Rate: Texel rate is the maximum amount of texture map elements (texels) that are processed in one second. This number is worked out by multiplying the total number of texture units 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 applied per second.

Pixel Rate: Pixel rate is the maximum number of pixels that the graphics chip can possibly write to its local memory in a second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the number of Render Output Units by the clock speed of the card. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel output rate is also dependant on lots of other factors, especially the memory bandwidth of the card - the lower the bandwidth is, the lower the potential to reach the max fill rate.


2 Responses to “Geforce GTX 680 vs Radeon HD 7950”
Gamer Pc - Forum says:

[...] ist es an sich mit der Grafikkarte. Hier mal ein kleiner Benchmark Vergleich der beiden Karten: GTX 680 vs. HD 7950 Bis auf das wirklich schon l├Ącherliche Netzteil (das 400W) ist der Rest an sich reine [...]

daddy'sbackyoubeaches says:

AMD cards are only great at general computation. Nvidia always wins in raster performance.

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