GeForce GT 340 1GB vs Radeon HD 6770

Intro

Compare those specs to the Radeon HD 6770, which uses a 40 nm design. AMD has clocked the core speed at 900 MHz. The GDDR5 RAM runs at a speed of 1050 MHz on this model. It features 800 SPUs along with 40 TAUs and 16 Rasterization Operator Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GT 340 1GB		69 Watts
Radeon HD 6770		108 Watts
	Difference: 39 Watts (57%)

Memory Bandwidth

The Radeon HD 6770, in theory, should be a lot faster than the GeForce GT 340 1GB overall. (explain)

Radeon HD 6770		67200 MB/sec
GeForce GT 340 1GB		54400 MB/sec
	Difference: 12800 (24%)

Texel Rate

The Radeon HD 6770 is a lot (approximately 105%) more effective at anisotropic filtering than the GeForce GT 340 1GB. (explain)

Radeon HD 6770		36000 Mtexels/sec
GeForce GT 340 1GB		17600 Mtexels/sec
	Difference: 18400 (105%)

Pixel Rate

The Radeon HD 6770 is a lot (more or less 227%) better at anti-aliasing than the GeForce GT 340 1GB, and also will be capable of handling higher screen resolutions better. (explain)

Radeon HD 6770		14400 Mpixels/sec
GeForce GT 340 1GB		4400 Mpixels/sec
	Difference: 10000 (227%)

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 data (measured in MB per second) that can be moved across the external memory interface in one second. It is worked out by multiplying the card's interface width by its memory speed. If the card has DDR type memory, the result should be multiplied by 2 once again. If it uses DDR5, multiply by ANOTHER 2x. The better the bandwidth is, the better the card will be in general. It especially helps with AA, HDR and high resolutions.

Texel Rate: Texel rate is the maximum texture map elements (texels) that can be processed per second. This number is calculated by multiplying the total texture units 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 processed per second.

Pixel Rate: Pixel rate is the maximum number of pixels the video card could possibly record to its local memory in a second - measured in millions of pixels per second. The figure is calculated by multiplying the amount of Render Output Units by the the card's 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, most notably the memory bandwidth of the card - the lower the bandwidth is, the lower the ability to get to the max fill rate.