GeForce GT 440 3GB vs GeForce GTS 250 1GB

Intro

Compare those specifications to the GeForce GTS 250 1GB, which has a clock frequency of 738 MHz and a GDDR3 memory frequency of 1100 MHz. It also makes use of a 256-bit memory bus, and makes use of a 65/55 nm design. It is made up of 128 SPUs, 64 TAUs, and 16 Raster Operation Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GT 440 3GB		56 Watts
GeForce GTS 250 1GB		145 Watts
	Difference: 89 Watts (159%)

Memory Bandwidth

In theory, the GeForce GTS 250 1GB should perform quite a bit faster than the GeForce GT 440 3GB overall. (explain)

GeForce GTS 250 1GB		70400 MB/sec
GeForce GT 440 3GB		43200 MB/sec
	Difference: 27200 (63%)

Texel Rate

The GeForce GTS 250 1GB will be much (about 231%) faster with regards to anisotropic filtering than the GeForce GT 440 3GB. (explain)

GeForce GTS 250 1GB		47232 Mtexels/sec
GeForce GT 440 3GB		14256 Mtexels/sec
	Difference: 32976 (231%)

Pixel Rate

The GeForce GT 440 3GB should be much (about 21%) better at full screen anti-aliasing than the GeForce GTS 250 1GB, and capable of handling higher screen resolutions better. (explain)

GeForce GT 440 3GB		14256 Mpixels/sec
GeForce GTS 250 1GB		11808 Mpixels/sec
	Difference: 2448 (21%)

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 information (in units of megabytes per second) that can be transferred past the external memory interface within a second. It's worked out by multiplying the interface width by its memory clock speed. If the card has DDR memory, it must be multiplied by 2 again. If DDR5, multiply by 4 instead. The higher the card's memory bandwidth, the better 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 texture map elements (texels) that can be applied per second. This number is calculated by multiplying the total amount of texture units by the core clock speed of the chip. The better this number, the better the graphics card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels processed per second.

Pixel Rate: Pixel rate is the maximum number of pixels the graphics card can possibly record to its local memory in a second - measured in millions of pixels per second. The figure is worked out by multiplying the amount of ROPs by the clock speed of the card. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel fill rate is also dependant on lots of other factors, most notably the memory bandwidth of the card - the lower the bandwidth is, the lower the potential to reach the maximum fill rate.