GeForce GT 240 GDDR5 1GB vs GeForce GTS 450

Intro

Compare those specs to the GeForce GTS 450, which makes use of a 40 nm design. nVidia has set the core speed at 783 MHz. The GDDR5 memory works at a frequency of 902 MHz on this model. It features 192 SPUs along with 32 TAUs and 16 Rasterization Operator Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GT 240 GDDR5 1GB		70 Watts
GeForce GTS 450		106 Watts
	Difference: 36 Watts (51%)

Memory Bandwidth

In theory, the GeForce GTS 450 is 6% faster than the GeForce GT 240 GDDR5 1GB in general, due to its higher bandwidth. (explain)

GeForce GTS 450		57728 MB/sec
GeForce GT 240 GDDR5 1GB		54400 MB/sec
	Difference: 3328 (6%)

Texel Rate

The GeForce GTS 450 is quite a bit (approximately 42%) more effective at AF than the GeForce GT 240 GDDR5 1GB. (explain)

GeForce GTS 450		25056 Mtexels/sec
GeForce GT 240 GDDR5 1GB		17600 Mtexels/sec
	Difference: 7456 (42%)

Pixel Rate

If using lots of anti-aliasing is important to you, then the GeForce GTS 450 is a better choice, and very much so. (explain)

GeForce GTS 450		12528 Mpixels/sec
GeForce GT 240 GDDR5 1GB		4400 Mpixels/sec
	Difference: 8128 (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: Memory bandwidth is the largest amount of information (counted in megabytes per second) that can be moved past the external memory interface in one second. It's calculated by multiplying the interface width by its memory clock speed. If the card has DDR type RAM, the result should be multiplied by 2 again. If it uses DDR5, multiply by 4 instead. The higher the card's memory bandwidth, the faster the card will be in general. It especially helps with anti-aliasing, HDR and high resolutions.

Texel Rate: Texel rate is the maximum texture map elements (texels) that are applied in one second. This number 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 card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels in one second.

Pixel Rate: Pixel rate is the maximum amount of pixels the graphics card can possibly record to its local memory in one second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the amount of Render Output Units by the clock speed of the card. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel fill rate is also dependant on many 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.