GeForce GT 315 vs GeForce GT 440 3GB

Intro

Compare all of that to the GeForce GT 440 3GB, which uses a 40 nm design. nVidia has set the core frequency at 594 MHz. The GDDR3 memory runs at a speed of 900 MHz on this particular card. It features 144 SPUs along with 24 Texture Address Units and 24 Rasterization Operator Units.

Display Graphs

Hide Graphs

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GT 315		52 Watts
GeForce GT 440 3GB		56 Watts
	Difference: 4 Watts (8%)

Memory Bandwidth

The GeForce GT 440 3GB should in theory perform much faster than the GeForce GT 315 overall. (explain)

GeForce GT 440 3GB		43200 MB/sec
GeForce GT 315		25280 MB/sec
	Difference: 17920 (71%)

Texel Rate

The GeForce GT 440 3GB will be quite a bit (approximately 43%) better at anisotropic filtering than the GeForce GT 315. (explain)

GeForce GT 440 3GB		14256 Mtexels/sec
GeForce GT 315		10000 Mtexels/sec
	Difference: 4256 (43%)

Pixel Rate

If running with lots of anti-aliasing is important to you, then the GeForce GT 440 3GB is superior to the GeForce GT 315, by a large margin. (explain)

GeForce GT 440 3GB		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 (measured in megabytes per second) that can be moved over the external memory interface in a second. The number is worked out by multiplying the card's interface width by its memory speed. If the card has DDR type memory, the result 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, HDR and higher screen resolutions.

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

Pixel Rate: Pixel rate is the maximum amount of pixels that the graphics card could possibly write to its local memory per second - measured in millions of pixels per second. The number is worked out by multiplying the number of Render Output Units by the the card's clock speed. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel output rate is also dependant on many other factors, most notably the memory bandwidth - the lower the bandwidth is, the lower the ability to get to the maximum fill rate.