GeForce GTX 650 Ti 2GB vs Radeon HD 6770

Intro

Compare those specifications to the Radeon HD 6770, which has GPU core speed of 900 MHz, and 512 MB of GDDR5 memory set to run at 1050 MHz through a 128-bit bus. It also features 800 SPUs, 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

The GeForce GTX 650 Ti 2GB should in theory perform much 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

The GeForce GTX 650 Ti 2GB will be a small bit (approximately 3%) faster with regards to AA than the Radeon HD 6770, and also should be able to handle higher screen resolutions better. (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: Memory bandwidth is the max amount of data (measured in MB per second) that can be transferred past the external memory interface within a second. It's worked out by multiplying the bus width by its memory clock speed. In the case of DDR memory, the result should be multiplied by 2 again. If it uses DDR5, multiply by ANOTHER 2x. The higher the bandwidth is, the better the card will be in general. It especially helps with AA, HDR and higher screen resolutions.

Texel Rate: Texel rate is the maximum amount of texture map elements (texels) that are applied 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 higher this number, 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 maximum number of pixels the graphics card could possibly record to the local memory in a second - measured in millions of pixels per second. The number 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 fill rate also depends on quite a few other factors, most notably the memory bandwidth - the lower the bandwidth is, the lower the potential to get to the max fill rate.