GeForce GTX 650 Ti 2GB vs Radeon HD 6770

Intro

Compare those specs to the Radeon HD 6770, which comes with a GPU core clock speed of 900 MHz, and 512 MB of GDDR5 memory set to run at 1050 MHz through a 128-bit bus. It also is comprised of 800 Stream Processors, 40 Texture Address Units, and 16 Raster Operation Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 6770		108 Watts
GeForce GTX 650 Ti 2GB		110 Watts
	Difference: 2 Watts (2%)

Memory Bandwidth

In theory, the GeForce GTX 650 Ti 2GB should perform quite a bit faster than the Radeon HD 6770 in general. (explain)

GeForce GTX 650 Ti 2GB		86400 MB/sec
Radeon HD 6770		67200 MB/sec
	Difference: 19200 (29%)

Texel Rate

The GeForce GTX 650 Ti 2GB will be a lot (more or less 65%) more effective at AF than the Radeon HD 6770. (explain)

GeForce GTX 650 Ti 2GB		59392 Mtexels/sec
Radeon HD 6770		36000 Mtexels/sec
	Difference: 23392 (65%)

Pixel Rate

If running with lots of anti-aliasing is important to you, then the GeForce GTX 650 Ti 2GB is superior to the Radeon HD 6770, but it probably won't make a huge difference. (explain)

GeForce GTX 650 Ti 2GB		14848 Mpixels/sec
Radeon HD 6770		14400 Mpixels/sec
	Difference: 448 (3%)

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: Bandwidth is the largest amount of information (in units of megabytes per second) that can be moved across the external memory interface within a second. It is worked out by multiplying the card's bus width by its memory clock speed. If it uses DDR type memory, the result should be multiplied by 2 once again. If DDR5, multiply by ANOTHER 2x. The higher the memory bandwidth, the faster the card will be in general. It especially helps with anti-aliasing, High Dynamic Range and higher screen resolutions.

Texel Rate: Texel rate is the maximum texture map elements (texels) that are processed in one second. This number is calculated by multiplying the total number of texture units by the core speed of the chip. The better the texel rate, the better the video card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels applied per second.

Pixel Rate: Pixel rate is the maximum number of pixels that the graphics chip can possibly write to the local memory in a second - measured in millions of pixels per second. The figure is calculated by multiplying the number of ROPs by the the core speed of the card. ROPs (Raster Operations Pipelines - sometimes also referred to as Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel fill rate is also dependant on lots of other factors, most notably the memory bandwidth of the card - the lower the bandwidth is, the lower the ability to get to the max fill rate.