GeForce GT 240 GDDR5 1GB vs GeForce GTS 450

Intro

Compare all that to the GeForce GTS 450, which comes with clock speeds of 783 MHz on the GPU, and 902 MHz on the 512 MB of GDDR5 memory. It features 192 SPUs along with 32 Texture Address Units and 16 ROPs.

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 should be a little bit faster than the GeForce GT 240 GDDR5 1GB overall. (explain)

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

Texel Rate

The GeForce GTS 450 will be quite a bit (about 42%) more effective at texture filtering 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

The GeForce GTS 450 should be much (approximately 185%) more effective at AA than the GeForce GT 240 GDDR5 1GB, and also capable of handling higher screen resolutions better. (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 maximum amount of information (counted in megabytes per second) that can be transferred across the external memory interface within a second. The number is worked out by multiplying the interface width by its memory clock speed. If it uses DDR type RAM, it must be multiplied by 2 once again. If DDR5, multiply by 4 instead. The better the bandwidth is, the faster the card will be in general. It especially helps with AA, High Dynamic Range and high resolutions.

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

Pixel Rate: Pixel rate is the maximum number of pixels that the graphics card could possibly record to the local memory in one second - measured in millions of pixels per second. The figure is worked out by multiplying the number of Render Output Units by the clock speed of the card. ROPs (Raster Operations Pipelines - sometimes also referred to as Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel output rate is also dependant on many other factors, especially the memory bandwidth - the lower the bandwidth is, the lower the ability to reach the max fill rate.