GeForce GT 320 vs Geforce GTX 770

Intro

Compare those specs to the Geforce GTX 770, which features GPU clock speed of 1046 MHz, and 2048 MB of GDDR5 RAM running at 1753 MHz through a 256-bit bus. It also is made up of 1536 SPUs, 128 Texture Address Units, and 32 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GT 320		43 Watts
Geforce GTX 770		230 Watts
	Difference: 187 Watts (435%)

Memory Bandwidth

In theory, the Geforce GTX 770 should be 788% faster than the GeForce GT 320 overall, due to its higher data rate. (explain)

Geforce GTX 770		224384 MB/sec
GeForce GT 320		25280 MB/sec
	Difference: 199104 (788%)

Texel Rate

The Geforce GTX 770 is much (approximately 933%) better at AF than the GeForce GT 320. (explain)

Geforce GTX 770		133888 Mtexels/sec
GeForce GT 320		12960 Mtexels/sec
	Difference: 120928 (933%)

Pixel Rate

If using high levels of AA is important to you, then the Geforce GTX 770 is superior to the GeForce GT 320, by a large margin. (explain)

Geforce GTX 770		33472 Mpixels/sec
GeForce GT 320		4320 Mpixels/sec
	Difference: 29152 (675%)

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 data (measured in megabytes per second) that can be transported past the external memory interface in a second. It is worked out by multiplying the card's bus width by its memory speed. In the case of DDR type memory, it must be multiplied by 2 again. If it uses DDR5, multiply by 4 instead. The higher the memory bandwidth, 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 amount of texture map elements (texels) that can be applied in one second. This figure is calculated by multiplying the total number of texture units by the core speed of the chip. The better the texel rate, the better the 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 most pixels the video card can possibly write to the local memory per second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the number of ROPs by the clock speed of the card. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel fill rate also depends on quite a few other factors, especially the memory bandwidth - the lower the bandwidth is, the lower the potential to reach the max fill rate.