Geforce GTX 690 vs Radeon HD 6850

Intro

Compare those specifications to the Radeon HD 6850, which comes with a GPU core clock speed of 775 MHz, and 1024 MB of GDDR5 RAM running at 1000 MHz through a 256-bit bus. It also is comprised of 960 Stream Processors, 48 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 6850		2395 points
	Difference: 10716 (447%)

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 6850		127 Watts
Geforce GTX 690		300 Watts
	Difference: 173 Watts (136%)

Memory Bandwidth

Theoretically speaking, the Geforce GTX 690 should be quite a bit faster than the Radeon HD 6850 overall. (explain)

Geforce GTX 690		384512 MB/sec
Radeon HD 6850		128000 MB/sec
	Difference: 256512 (200%)

Texel Rate

The Geforce GTX 690 should be a lot (approximately 530%) more effective at texture filtering than the Radeon HD 6850. (explain)

Geforce GTX 690		234240 Mtexels/sec
Radeon HD 6850		37200 Mtexels/sec
	Difference: 197040 (530%)

Pixel Rate

The Geforce GTX 690 will be quite a bit (more or less 136%) more effective at full screen anti-aliasing than the Radeon HD 6850, and also will be able to handle higher screen resolutions more effectively. (explain)

Geforce GTX 690		58560 Mpixels/sec
Radeon HD 6850		24800 Mpixels/sec
	Difference: 33760 (136%)

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: Bandwidth is the largest amount of information (counted in MB per second) that can be transferred over the external memory interface in one second. The number is calculated by multiplying the card's bus width by its memory clock speed. In the case of DDR RAM, it should be multiplied by 2 again. If it uses DDR5, multiply by 4 instead. The better the card's memory bandwidth, the faster the card will be in general. It especially helps with anti-aliasing, HDR and high resolutions.

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

Pixel Rate: Pixel rate is the most pixels that the graphics chip could possibly write to its local memory in one second - measured in millions of pixels per second. The figure is worked out by multiplying the number of Render Output Units by the clock speed of the card. ROPs (Raster Operations Pipelines - sometimes also referred to as Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel output rate also depends on many other factors, most notably the memory bandwidth of the card - the lower the memory bandwidth is, the lower the potential to reach the maximum fill rate.