GeForce GT 320 vs Radeon HD 6770

Intro

Compare that to the Radeon HD 6770, which uses a 40 nm design. AMD has clocked the core speed at 900 MHz. The GDDR5 memory works at a frequency of 1050 MHz on this model. It features 800 SPUs along with 40 TAUs and 16 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GT 320		43 Watts
Radeon HD 6770		108 Watts
	Difference: 65 Watts (151%)

Memory Bandwidth

Theoretically speaking, the Radeon HD 6770 should be 166% quicker than the GeForce GT 320 overall, due to its higher data rate. (explain)

Radeon HD 6770		67200 MB/sec
GeForce GT 320		25280 MB/sec
	Difference: 41920 (166%)

Texel Rate

The Radeon HD 6770 should be quite a bit (more or less 178%) more effective at texture filtering than the GeForce GT 320. (explain)

Radeon HD 6770		36000 Mtexels/sec
GeForce GT 320		12960 Mtexels/sec
	Difference: 23040 (178%)

Pixel Rate

If using a high resolution is important to you, then the Radeon HD 6770 is a better choice, and very much so. (explain)

Radeon HD 6770		14400 Mpixels/sec
GeForce GT 320		4320 Mpixels/sec
	Difference: 10080 (233%)

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 maximum amount of information (measured in megabytes per second) that can be moved across the external memory interface in a second. It is calculated by multiplying the interface width by the speed of its memory. If it uses DDR memory, the result should be multiplied by 2 once again. If DDR5, multiply by ANOTHER 2x. The better the card's memory bandwidth, the faster the card will be in general. It especially helps with anti-aliasing, HDR and higher screen resolutions.

Texel Rate: Texel rate is the maximum texture map elements (texels) that can be applied per second. This number is worked out by multiplying the total amount of texture units of the card by the core speed of the chip. The better this number, the better the card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels per second.

Pixel Rate: Pixel rate is the maximum number of pixels the video card can possibly record to the local memory in a second - measured in millions of pixels per second. Pixel rate is calculated by multiplying the number of ROPs by the the core speed of the card. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel output rate also depends on lots of other factors, especially the memory bandwidth - the lower the bandwidth is, the lower the potential to reach the maximum fill rate.