GeForce GT 340 1GB vs Radeon HD 7970

Intro

Compare those specs to the Radeon HD 7970, which comes with a GPU core clock speed of 925 MHz, and 3072 MB of GDDR5 memory set to run at 1375 MHz through a 384-bit bus. It also is made up of 2048 Stream Processors, 128 TAUs, and 32 Raster Operation Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GT 340 1GB		69 Watts
Radeon HD 7970		250 Watts
	Difference: 181 Watts (262%)

Memory Bandwidth

Theoretically, the Radeon HD 7970 should be a lot faster than the GeForce GT 340 1GB overall. (explain)

Radeon HD 7970		264000 MB/sec
GeForce GT 340 1GB		54400 MB/sec
	Difference: 209600 (385%)

Texel Rate

The Radeon HD 7970 should be a lot (about 573%) more effective at AF than the GeForce GT 340 1GB. (explain)

Radeon HD 7970		118400 Mtexels/sec
GeForce GT 340 1GB		17600 Mtexels/sec
	Difference: 100800 (573%)

Pixel Rate

The Radeon HD 7970 is much (about 573%) more effective at anti-aliasing than the GeForce GT 340 1GB, and also able to handle higher resolutions without losing too much performance. (explain)

Radeon HD 7970		29600 Mpixels/sec
GeForce GT 340 1GB		4400 Mpixels/sec
	Difference: 25200 (573%)

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 transported past the external memory interface within a second. The number is worked out by multiplying the interface width by its memory speed. In the case of DDR RAM, it must be multiplied by 2 once again. If DDR5, multiply by ANOTHER 2x. The better the memory bandwidth, the better the card will be in general. It especially helps with AA, High Dynamic Range and high resolutions.

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

Pixel Rate: Pixel rate is the maximum number of pixels the video card could possibly record to the local memory per second - measured in millions of pixels per second. The figure is calculated by multiplying the number of Render Output Units by the the card's clock speed. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel rate also depends on many other factors, most notably the memory bandwidth - the lower the bandwidth is, the lower the potential to get to the maximum fill rate.