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Geforce GTX 680 vs Radeon HD 7950


Intro

The Geforce GTX 680 features clock speeds of 1006 MHz on the GPU, and 1502 MHz on the 2048 MB of GDDR5 memory. It features 1536 SPUs as well as 128 Texture Address Units and 32 ROPs.

Compare that to the Radeon HD 7950, which makes use of a 28 nm design. AMD has set the core frequency at 800 MHz. The GDDR5 memory is set to run at a speed of 1250 MHz on this card. It features 1792 SPUs along with 112 TAUs and 32 ROPs.

Display Graphs

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Benchmarks

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

Radeon HD 7950 7731 points
Geforce GTX 680 7646 points
Difference: 85 (1%)

Ethereum Mining Hash Rate

Radeon HD 7950 21 Mh/s
Geforce GTX 680 16 Mh/s
Difference: 5 (31%)

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

Performance-wise, the Radeon HD 7950 should theoretically be quite a bit superior to the Geforce GTX 680 in general. (explain)

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

Texel Rate

The Geforce GTX 680 is quite a bit (about 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 using a high resolution 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

Geforce GTX 680

Radeon HD 7950

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: Bandwidth is the maximum amount of information (in units of MB per second) that can be transported past the external memory interface in a second. It is worked out by multiplying the card's interface width by the speed of its memory. If it uses DDR type memory, it must be multiplied by 2 again. If DDR5, multiply by ANOTHER 2x. The higher the bandwidth is, the better the card will be in general. It especially helps with anti-aliasing, High Dynamic Range and higher screen resolutions.

Texel Rate: Texel rate is the maximum number of texture map elements (texels) that can be applied in one second. This figure is calculated by multiplying the total number of texture units of the card by the core speed of the chip. The better the texel rate, the better the video card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels in a second.

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

Geforce GTX 680

Radeon HD 7950

Comments

2 Responses to “Geforce GTX 680 vs Radeon HD 7950”
Gamer Pc - netzwelt.de 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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