GeForce GT 320 vs Geforce GTX 780

Intro

Compare that to the Geforce GTX 780, which comes with core speeds of 863 MHz on the GPU, and 1502 MHz on the 3072 MB of GDDR5 memory. It features 2304 SPUs as well as 192 Texture Address Units and 48 Rasterization Operator Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GT 320		43 Watts
Geforce GTX 780		250 Watts
	Difference: 207 Watts (481%)

Memory Bandwidth

Theoretically speaking, the Geforce GTX 780 is 1041% faster than the GeForce GT 320 in general, because of its greater data rate. (explain)

Geforce GTX 780		288384 MB/sec
GeForce GT 320		25280 MB/sec
	Difference: 263104 (1041%)

Texel Rate

The Geforce GTX 780 is a lot (approximately 1179%) more effective at anisotropic filtering than the GeForce GT 320. (explain)

Geforce GTX 780		165696 Mtexels/sec
GeForce GT 320		12960 Mtexels/sec
	Difference: 152736 (1179%)

Pixel Rate

The Geforce GTX 780 will be much (about 859%) better at anti-aliasing than the GeForce GT 320, and capable of handling higher resolutions without losing too much performance. (explain)

Geforce GTX 780		41424 Mpixels/sec
GeForce GT 320		4320 Mpixels/sec
	Difference: 37104 (859%)

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 largest amount of information (counted in MB per second) that can be transferred past the external memory interface within a second. It is calculated by multiplying the bus width by its memory clock speed. If the card has DDR type memory, it must be multiplied by 2 once again. If DDR5, multiply by 4 instead. The higher the bandwidth is, the faster the card will be in general. It especially helps with AA, HDR and higher screen resolutions.

Texel Rate: Texel rate is the maximum texture map elements (texels) that can be processed per second. This is worked out by multiplying the total number of texture units by the core clock speed of the chip. The better the texel rate, the better the video 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 amount of pixels that the graphics chip could possibly write to its local memory per second - measured in millions of pixels per second. The number is worked out by multiplying the amount of Raster Operations Pipelines by the clock speed of the card. ROPs (Raster Operations Pipelines - sometimes also referred to as Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel output rate also depends on many other factors, most notably the memory bandwidth - the lower the memory bandwidth is, the lower the potential to get to the maximum fill rate.