GeForce GTX 650 vs Radeon HD 6850

Intro

Compare those specs to the Radeon HD 6850, which comes with clock speeds of 775 MHz on the GPU, and 1000 MHz on the 1024 MB of GDDR5 RAM. It features 960 SPUs along with 48 Texture Address Units and 32 Rasterization Operator Units.

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 6850		2395 points
GeForce GTX 650		2263 points
	Difference: 132 (6%)

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GTX 650		64 Watts
Radeon HD 6850		127 Watts
	Difference: 63 Watts (98%)

Memory Bandwidth

Theoretically speaking, the Radeon HD 6850 will be 60% faster than the GeForce GTX 650 in general, due to its higher bandwidth. (explain)

Radeon HD 6850		128000 MB/sec
GeForce GTX 650		80000 MB/sec
	Difference: 48000 (60%)

Texel Rate

The Radeon HD 6850 should be just a bit (about 10%) better at texture filtering than the GeForce GTX 650. (explain)

Radeon HD 6850		37200 Mtexels/sec
GeForce GTX 650		33856 Mtexels/sec
	Difference: 3344 (10%)

Pixel Rate

The Radeon HD 6850 will be quite a bit (about 47%) more effective at full screen anti-aliasing than the GeForce GTX 650, and will be able to handle higher screen resolutions better. (explain)

Radeon HD 6850		24800 Mpixels/sec
GeForce GTX 650		16928 Mpixels/sec
	Difference: 7872 (47%)

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 (measured in MB per second) that can be transported across the external memory interface within a second. It's worked out by multiplying the card's bus width by its memory speed. If it uses DDR type memory, the result should be multiplied by 2 again. If DDR5, multiply by 4 instead. The higher the bandwidth is, the better the card will be in general. It especially helps with AA, High Dynamic Range and high resolutions.

Texel Rate: Texel rate is the maximum texture map elements (texels) that are processed 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 graphics card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels in one second.

Pixel Rate: Pixel rate is the most pixels the graphics card can possibly record to the local memory in a 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 called Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel fill rate also depends on many other factors, especially the memory bandwidth - the lower the memory bandwidth is, the lower the ability to reach the max fill rate.