GeForce GT 315 vs GeForce GT 440 1.5GB

Intro

Compare those specifications to the GeForce GT 440 1.5GB, which features GPU core speed of 594 MHz, and 1536 MB of GDDR3 memory set to run at 900 MHz through a 192-bit bus. It also features 144 Stream Processors, 24 TAUs, and 24 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GT 315		52 Watts
GeForce GT 440 1.5GB		56 Watts
	Difference: 4 Watts (8%)

Memory Bandwidth

The GeForce GT 440 1.5GB, in theory, should perform a lot faster than the GeForce GT 315 overall. (explain)

GeForce GT 440 1.5GB		43200 MB/sec
GeForce GT 315		25280 MB/sec
	Difference: 17920 (71%)

Texel Rate

The GeForce GT 440 1.5GB is a lot (about 43%) better at texture filtering than the GeForce GT 315. (explain)

GeForce GT 440 1.5GB		14256 Mtexels/sec
GeForce GT 315		10000 Mtexels/sec
	Difference: 4256 (43%)

Pixel Rate

If running with a high resolution is important to you, then the GeForce GT 440 1.5GB is superior to the GeForce GT 315, by far. (explain)

GeForce GT 440 1.5GB		14256 Mpixels/sec
GeForce GT 315		5000 Mpixels/sec
	Difference: 9256 (185%)

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 largest amount of data (counted in megabytes per second) that can be transported past the external memory interface in a second. It is calculated by multiplying the card's interface width by its memory clock speed. If the card has DDR RAM, it should be multiplied by 2 again. If DDR5, multiply by 4 instead. The better the card's memory bandwidth, the better the card will be in general. It especially helps with AA, High Dynamic Range and higher screen resolutions.

Texel Rate: Texel rate is the maximum amount of texture map elements (texels) that are processed in one second. This figure is worked out by multiplying the total number of texture units by the core speed of the chip. The better the texel rate, the better the graphics card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels applied per second.

Pixel Rate: Pixel rate is the maximum amount of pixels that the graphics card could possibly write to the local memory per second - measured in millions of pixels per second. The figure is worked out by multiplying the number of Render Output Units by the the core clock speed. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel fill 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 potential to reach the maximum fill rate.