Geforce GTX 690 vs Radeon HD 7950

Intro

Compare those specifications to the Radeon HD 7950, which comes with a clock frequency of 800 MHz and a GDDR5 memory speed of 1250 MHz. It also features a 384-bit memory bus, and makes use of a 28 nm design. It is made up of 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

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

The Geforce GTX 690 should theoretically perform much faster than the Radeon HD 7950 overall. (explain)

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

Texel Rate

The Geforce GTX 690 is much (approximately 161%) more effective at texture 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 much (approximately 129%) faster with regards to FSAA than the Radeon HD 7950, and also able to handle higher resolutions better. (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 largest amount of data (counted in MB per second) that can be transported over the external memory interface in a second. The number is calculated by multiplying the bus width by the speed of its memory. In the case of DDR type RAM, the result should be multiplied by 2 once again. If it uses DDR5, multiply by 4 instead. The higher the memory bandwidth, the better the card will be in general. It especially helps with AA, HDR and high resolutions.

Texel Rate: Texel rate is the maximum amount of texture map elements (texels) that are applied in one second. This figure is worked out by multiplying the total texture units by the core clock speed of the chip. The better this number, the better the card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels processed in a second.

Pixel Rate: Pixel rate is the maximum number of pixels the video card can possibly record to its local memory per second - measured in millions of pixels per second. The figure is worked out by multiplying the number of ROPs by the the core speed of the card. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for outputting the pixels (image) to the screen. 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 reach the maximum fill rate.