Geforce GTX 680 vs Radeon HD 7950

Intro

Compare all that to the Radeon HD 7950, which has a core clock speed of 800 MHz and a GDDR5 memory frequency of 1250 MHz. It also features a 384-bit bus, and uses a 28 nm design. It features 1792 SPUs, 112 Texture Address Units, 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		7650 points
	Difference: 81 (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

Theoretically speaking, the Radeon HD 7950 is 25% faster than the Geforce GTX 680 in general, because of its greater data rate. (explain)

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

Texel Rate

The Geforce GTX 680 should be much (approximately 44%) more effective at anisotropic filtering 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 screen resolution is important to you, then the Geforce GTX 680 is the winner, by a large margin. (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

Specifications

Memory Bandwidth: Memory bandwidth is the max amount of data (in units of megabytes per second) that can be transferred past the external memory interface in one second. The number is worked out by multiplying the card's bus width by its memory clock speed. In the case of DDR RAM, it must be multiplied by 2 again. If DDR5, multiply by 4 instead. The better the bandwidth is, the better the card will be in general. It especially helps with anti-aliasing, High Dynamic Range and high resolutions.

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

Pixel Rate: Pixel rate is the maximum number of pixels the graphics card could possibly write to its local memory per second - measured in millions of pixels per second. The figure is calculated by multiplying the amount of ROPs by the clock speed of the card. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel output rate also depends on many other factors, especially the memory bandwidth - the lower the bandwidth is, the lower the potential to get to the max fill rate.