Geforce GTX 690 vs Radeon HD 7850

Intro

Compare those specs to the Radeon HD 7850, which features GPU core speed of 860 MHz, and 2048 MB of GDDR5 RAM set to run at 1200 MHz through a 256-bit bus. It also is comprised of 1024 SPUs, 64 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 7850		5200 points
	Difference: 7911 (152%)

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 7850		130 Watts
Geforce GTX 690		300 Watts
	Difference: 170 Watts (131%)

Memory Bandwidth

In theory, the Geforce GTX 690 is 150% faster than the Radeon HD 7850 overall, because of its greater data rate. (explain)

Geforce GTX 690		384512 MB/sec
Radeon HD 7850		153600 MB/sec
	Difference: 230912 (150%)

Texel Rate

The Geforce GTX 690 is much (more or less 326%) faster with regards to AF than the Radeon HD 7850. (explain)

Geforce GTX 690		234240 Mtexels/sec
Radeon HD 7850		55040 Mtexels/sec
	Difference: 179200 (326%)

Pixel Rate

The Geforce GTX 690 will be quite a bit (more or less 113%) more effective at full screen anti-aliasing than the Radeon HD 7850, and will be capable of handling higher screen resolutions more effectively. (explain)

Geforce GTX 690		58560 Mpixels/sec
Radeon HD 7850		27520 Mpixels/sec
	Difference: 31040 (113%)

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 information (measured in MB per second) that can be moved over the external memory interface in one second. It's worked out by multiplying the card's bus width by its memory clock speed. In the case of DDR type memory, the result should be multiplied by 2 again. If DDR5, multiply by 4 instead. The better the card's 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 can be processed per second. This is calculated by multiplying the total number of texture units of the card by the core 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 per second.

Pixel Rate: Pixel rate is the maximum amount of pixels that the graphics chip can possibly record to the local memory per second - measured in millions of pixels per second. The number is calculated by multiplying the amount of colour ROPs by the clock 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 lots of other factors, especially the memory bandwidth - the lower the memory bandwidth is, the lower the ability to reach the maximum fill rate.