Geforce GTX 690 vs Radeon HD 7950

Intro

Compare all of 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 makes use of a 384-bit memory bus, and uses a 28 nm design. It is made up of 1792 SPUs, 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

Geforce GTX 690		13111 points
Radeon HD 7950		7731 points
	Difference: 5380 (70%)

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 7950		200 Watts
Geforce GTX 690		300 Watts
	Difference: 100 Watts (50%)

Memory Bandwidth

In theory, the Geforce GTX 690 is 60% faster than the Radeon HD 7950 in general, due to its higher data rate. (explain)

Geforce GTX 690		384512 MB/sec
Radeon HD 7950		240000 MB/sec
	Difference: 144512 (60%)

Texel Rate

The Geforce GTX 690 should be much (about 161%) better at anisotropic filtering than the Radeon HD 7950. (explain)

Geforce GTX 690		234240 Mtexels/sec
Radeon HD 7950		89600 Mtexels/sec
	Difference: 144640 (161%)

Pixel Rate

The Geforce GTX 690 should be a lot (about 129%) better at full screen anti-aliasing than the Radeon HD 7950, and capable of handling higher screen resolutions more effectively. (explain)

Geforce GTX 690		58560 Mpixels/sec
Radeon HD 7950		25600 Mpixels/sec
	Difference: 32960 (129%)

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.

One or more cards in this comparison are multi-core. This means that their bandwidth, texel and pixel rates are theoretically doubled - this does not mean the card will actually perform twice as fast, but only that it should in theory be able to. Actual game benchmarks will give a more accurate idea of what it's capable of.

Price Comparison

Specifications

Memory Bandwidth: Memory bandwidth is the maximum amount of information (measured in megabytes per second) that can be moved across the external memory interface within a second. It is calculated by multiplying the bus width by the speed of its memory. If it uses DDR type RAM, it must be multiplied by 2 once again. If DDR5, multiply by ANOTHER 2x. The higher the memory bandwidth, the better the card will be in general. It especially helps with AA, 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 number is worked out by multiplying the total number of texture units by the core clock speed of the chip. The better this number, the better the video card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels applied per second.

Pixel Rate: Pixel rate is the maximum amount of pixels the video card could possibly write to the local memory in one second - measured in millions of pixels per second. The figure is worked out by multiplying the amount of colour ROPs by the the core speed of the card. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel output rate is also dependant on lots of other factors, most notably the memory bandwidth - the lower the memory bandwidth is, the lower the potential to reach the maximum fill rate.