GeForce GT 315 vs Radeon HD 6770 1GB

Intro

Compare those specifications to the Radeon HD 6770 1GB, which has clock speeds of 900 MHz on the GPU, and 1050 MHz on the 1024 MB of GDDR5 memory. It features 800 SPUs along with 40 Texture Address Units and 16 Rasterization Operator Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GT 315		52 Watts
Radeon HD 6770 1GB		108 Watts
	Difference: 56 Watts (108%)

Memory Bandwidth

Theoretically, the Radeon HD 6770 1GB should be a lot faster than the GeForce GT 315 in general. (explain)

Radeon HD 6770 1GB		67200 MB/sec
GeForce GT 315		25280 MB/sec
	Difference: 41920 (166%)

Texel Rate

The Radeon HD 6770 1GB should be quite a bit (about 260%) more effective at anisotropic filtering than the GeForce GT 315. (explain)

Radeon HD 6770 1GB		36000 Mtexels/sec
GeForce GT 315		10000 Mtexels/sec
	Difference: 26000 (260%)

Pixel Rate

The Radeon HD 6770 1GB will be a lot (about 188%) more effective at FSAA than the GeForce GT 315, and capable of handling higher resolutions more effectively. (explain)

Radeon HD 6770 1GB		14400 Mpixels/sec
GeForce GT 315		5000 Mpixels/sec
	Difference: 9400 (188%)

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 max amount of information (measured in megabytes per second) that can be moved across the external memory interface within a second. It's worked out by multiplying the card's bus width by its memory clock speed. In the case of DDR memory, it must be multiplied by 2 once again. If it uses 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 number of texture map elements (texels) that can be applied in one second. This is worked out by multiplying the total texture units by the core speed of the chip. The higher this number, the better the graphics card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels processed in one second.

Pixel Rate: Pixel rate is the most pixels that the graphics card can possibly record to its local memory per second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the amount of ROPs by the the core clock speed. ROPs (Raster Operations Pipelines - also sometimes 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, especially the memory bandwidth of the card - the lower the memory bandwidth is, the lower the ability to reach the maximum fill rate.