GeForce GTX 650 vs Radeon HD 6770 1GB

Intro

Compare those specifications to the Radeon HD 6770 1GB, which comes with core speeds of 900 MHz on the GPU, and 1050 MHz on the 1024 MB of GDDR5 memory. It features 800 SPUs as well as 40 Texture Address Units and 16 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GTX 650		64 Watts
Radeon HD 6770 1GB		108 Watts
	Difference: 44 Watts (69%)

Memory Bandwidth

In theory, the GeForce GTX 650 is 19% quicker than the Radeon HD 6770 1GB overall, due to its greater data rate. (explain)

GeForce GTX 650		80000 MB/sec
Radeon HD 6770 1GB		67200 MB/sec
	Difference: 12800 (19%)

Texel Rate

The Radeon HD 6770 1GB is a little bit (about 6%) more effective at AF than the GeForce GTX 650. (explain)

Radeon HD 6770 1GB		36000 Mtexels/sec
GeForce GTX 650		33856 Mtexels/sec
	Difference: 2144 (6%)

Pixel Rate

The GeForce GTX 650 will be just a bit (more or less 18%) more effective at AA than the Radeon HD 6770 1GB, and also able to handle higher resolutions while still performing well. (explain)

GeForce GTX 650		16928 Mpixels/sec
Radeon HD 6770 1GB		14400 Mpixels/sec
	Difference: 2528 (18%)

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 information (counted in megabytes per second) that can be moved across the external memory interface within a second. The number is calculated by multiplying the bus width by its memory clock speed. If the card has DDR type memory, it should be multiplied by 2 once again. If it uses DDR5, multiply by 4 instead. The higher the card's memory bandwidth, 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 amount of texture map elements (texels) that can be processed in one second. This figure is calculated by multiplying the total amount of texture units of the card by the core clock speed of the chip. The better the texel rate, the better the card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels in a second.

Pixel Rate: Pixel rate is the most pixels the graphics card could possibly record to the local memory per second - measured in millions of pixels per second. Pixel rate is calculated by multiplying the number of Raster Operations Pipelines by the the card's clock speed. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel output rate is also dependant on quite a few other factors, most notably the memory bandwidth of the card - the lower the memory bandwidth is, the lower the ability to get to the maximum fill rate.