GeForce GT 240 GDDR5 vs GeForce GTS 450 1GB

Intro

Compare those specs to the GeForce GTS 450 1GB, which has a GPU core clock speed of 783 MHz, and 1024 MB of GDDR5 RAM set to run at 902 MHz through a 128-bit bus. It also features 192 Stream Processors, 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

The GeForce GTS 450 1GB should theoretically perform a little bit faster than the GeForce GT 240 GDDR5 overall. (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 should be quite a bit (approximately 42%) better at AF 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 a lot (approximately 185%) faster with regards to AA than the GeForce GT 240 GDDR5, and will be able to handle 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 max amount of data (counted in megabytes per second) that can be transported across the external memory interface within a second. It's calculated by multiplying the bus width by the speed of its memory. If it uses DDR memory, it must be multiplied by 2 once again. If DDR5, multiply by ANOTHER 2x. The better the card's memory bandwidth, the faster 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 in one second. This number is calculated by multiplying the total amount of texture units of the card by the core 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 that the graphics chip can possibly write to its local memory in one second - measured in millions of pixels per second. The figure is worked out by multiplying the amount of colour ROPs by the clock speed of the card. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel fill rate also depends on lots of other factors, especially the memory bandwidth - the lower the memory bandwidth is, the lower the ability to reach the maximum fill rate.