GeForce GT 320 vs Radeon HD 3470 512MB

Intro

Compare those specs to the Radeon HD 3470 512MB, which features a clock speed of 800 MHz and a GDDR3 memory speed of 950 MHz. It also uses a 128-bit bus, and uses a 55 nm design. It is comprised of 40(8x5) SPUs, 4 Texture Address Units, and 4 Raster Operation Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Memory Bandwidth

The Radeon HD 3470 512MB should theoretically perform a bit faster than the GeForce GT 320 overall. (explain)

Radeon HD 3470 512MB		30400 MB/sec
GeForce GT 320		25280 MB/sec
	Difference: 5120 (20%)

Texel Rate

The GeForce GT 320 will be much (approximately 305%) faster with regards to AF than the Radeon HD 3470 512MB. (explain)

GeForce GT 320		12960 Mtexels/sec
Radeon HD 3470 512MB		3200 Mtexels/sec
	Difference: 9760 (305%)

Pixel Rate

The GeForce GT 320 should be quite a bit (approximately 35%) better at FSAA than the Radeon HD 3470 512MB, and will be capable of handling higher resolutions without slowing down too much. (explain)

GeForce GT 320		4320 Mpixels/sec
Radeon HD 3470 512MB		3200 Mpixels/sec
	Difference: 1120 (35%)

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 MB per second) that can be transferred past the external memory interface in one second. It is worked out by multiplying the interface width by the speed of its memory. In the case of DDR memory, it must be multiplied by 2 again. If DDR5, multiply by ANOTHER 2x. The better the bandwidth is, the faster the card will be in general. It especially helps with anti-aliasing, High Dynamic Range and higher screen resolutions.

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

Pixel Rate: Pixel rate is the most pixels that the graphics card could possibly record to the local memory in one second - measured in millions of pixels per second. Pixel rate is calculated by multiplying the amount of Raster Operations Pipelines by the the core clock speed. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel output rate also depends on many other factors, especially the memory bandwidth of the card - the lower the memory bandwidth is, the lower the potential to reach the max fill rate.