GeForce GT 320 vs Radeon HD 7950 3GB

Intro

Compare all that to the Radeon HD 7950 3GB, which comes with GPU clock speed of 800 MHz, and 3072 MB of GDDR5 RAM set to run at 1250 MHz through a 384-bit bus. It also is comprised of 1792 SPUs, 112 Texture Address Units, and 32 Raster Operation Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GT 320		43 Watts
Radeon HD 7950 3GB		200 Watts
	Difference: 157 Watts (365%)

Memory Bandwidth

In theory, the Radeon HD 7950 3GB is 849% quicker than the GeForce GT 320 in general, due to its higher data rate. (explain)

Radeon HD 7950 3GB		240000 MB/sec
GeForce GT 320		25280 MB/sec
	Difference: 214720 (849%)

Texel Rate

The Radeon HD 7950 3GB is quite a bit (approximately 591%) better at AF than the GeForce GT 320. (explain)

Radeon HD 7950 3GB		89600 Mtexels/sec
GeForce GT 320		12960 Mtexels/sec
	Difference: 76640 (591%)

Pixel Rate

The Radeon HD 7950 3GB is quite a bit (approximately 493%) better at FSAA than the GeForce GT 320, and should be able to handle higher screen resolutions without losing too much performance. (explain)

Radeon HD 7950 3GB		25600 Mpixels/sec
GeForce GT 320		4320 Mpixels/sec
	Difference: 21280 (493%)

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 (in units of MB per second) that can be transported across the external memory interface in one second. It's calculated by multiplying the interface width by its memory speed. If the card has DDR type memory, it should be multiplied by 2 again. If it uses DDR5, multiply by 4 instead. The higher 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 number of texture map elements (texels) that can be applied per second. This number is worked out by multiplying the total amount of texture units by the core clock speed of the chip. The higher the texel rate, the better the graphics card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels processed per second.

Pixel Rate: Pixel rate is the maximum amount of pixels the graphics card can possibly write to its local memory per second - measured in millions of pixels per second. The number is calculated by multiplying the number of Raster Operations Pipelines by the the core clock speed. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel fill rate is also dependant on many other factors, especially the memory bandwidth - the lower the bandwidth is, the lower the potential to get to the maximum fill rate.