GeForce GT 340 1GB vs Radeon HD 7970

Intro

Compare that to the Radeon HD 7970, which features a GPU core clock speed of 925 MHz, and 3072 MB of GDDR5 memory running at 1375 MHz through a 384-bit bus. It also features 2048 SPUs, 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 speaking, the Radeon HD 7970 will be 385% faster than the GeForce GT 340 1GB in general, due to its greater bandwidth. (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 much (approximately 573%) better 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 (approximately 573%) faster with regards to FSAA than the GeForce GT 340 1GB, and should be capable of handling higher screen resolutions more effectively. (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 largest amount of data (in units of MB per second) that can be transported over the external memory interface within a second. It is calculated by multiplying the card's interface width by its memory clock speed. In the case of DDR type memory, it must be multiplied by 2 once again. If it uses DDR5, multiply by 4 instead. The better the memory bandwidth, the faster the card will be in general. It especially helps with anti-aliasing, HDR and high resolutions.

Texel Rate: Texel rate is the maximum number of texture map elements (texels) that are processed per second. This figure is calculated by multiplying the total number of 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 a second.

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