GeForce GT 240 GDDR5 vs GeForce GTS 450 1GB

Intro

Compare all that to the GeForce GTS 450 1GB, which has core clock speeds of 783 MHz on the GPU, and 902 MHz on the 1024 MB of GDDR5 memory. It features 192 SPUs as well as 32 TAUs and 16 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

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

Memory Bandwidth

Theoretically speaking, the GeForce GTS 450 1GB should be 6% quicker than the GeForce GT 240 GDDR5 in general, because of its higher data rate. (explain)

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

Texel Rate

The GeForce GTS 450 1GB will be a lot (more or less 42%) better at texture filtering than the GeForce GT 240 GDDR5. (explain)

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

Pixel Rate

The GeForce GTS 450 1GB is much (more or less 185%) better at full screen anti-aliasing than the GeForce GT 240 GDDR5, and capable of handling higher screen resolutions without losing too much performance. (explain)

GeForce GTS 450 1GB		12528 Mpixels/sec
GeForce GT 240 GDDR5		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 MB per second) that can be moved over the external memory interface in one second. The number is worked out by multiplying the card's bus width by its memory clock speed. If it uses DDR type memory, it must be multiplied by 2 once again. If DDR5, multiply by 4 instead. The higher the bandwidth is, the faster 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 can be applied per second. This is worked out by multiplying the total texture units by the core clock speed of the chip. The better this number, the better the graphics card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels in a second.

Pixel Rate: Pixel rate is the most pixels that the graphics chip can possibly record to the 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 the card's clock speed. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel output rate also depends on many other factors, especially the memory bandwidth - the lower the memory bandwidth is, the lower the potential to get to the maximum fill rate.