GeForce GT 320 vs GeForce GT 440 1.5GB

Intro

Compare that to the GeForce GT 440 1.5GB, which features core clock speeds of 594 MHz on the GPU, and 900 MHz on the 1536 MB of GDDR3 RAM. It features 144 SPUs as well as 24 Texture Address Units and 24 Rasterization Operator Units.

Display Graphs

Hide Graphs

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GT 320		43 Watts
GeForce GT 440 1.5GB		56 Watts
	Difference: 13 Watts (30%)

Memory Bandwidth

The GeForce GT 440 1.5GB should theoretically perform quite a bit faster than the GeForce GT 320 overall. (explain)

GeForce GT 440 1.5GB		43200 MB/sec
GeForce GT 320		25280 MB/sec
	Difference: 17920 (71%)

Texel Rate

The GeForce GT 440 1.5GB will be a bit (about 10%) more effective at texture filtering than the GeForce GT 320. (explain)

GeForce GT 440 1.5GB		14256 Mtexels/sec
GeForce GT 320		12960 Mtexels/sec
	Difference: 1296 (10%)

Pixel Rate

The GeForce GT 440 1.5GB should be much (about 230%) faster with regards to full screen anti-aliasing than the GeForce GT 320, and also capable of handling higher screen resolutions without losing too much performance. (explain)

GeForce GT 440 1.5GB		14256 Mpixels/sec
GeForce GT 320		4320 Mpixels/sec
	Difference: 9936 (230%)

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 data (measured in MB per second) that can be transported over the external memory interface in a second. The number is worked out by multiplying the card's bus width by its memory speed. In the case of DDR RAM, the result should be multiplied by 2 once again. If DDR5, multiply by 4 instead. The better 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 per second. This 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 applied in one second.

Pixel Rate: Pixel rate is the maximum number of pixels the video card could possibly record to its local memory in one second - measured in millions of pixels per second. The number is worked out by multiplying the number 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 is also dependant on lots of other factors, especially the memory bandwidth of the card - the lower the memory bandwidth is, the lower the ability to reach the maximum fill rate.