GeForce GT 240 GDDR5 vs GeForce GTS 450

Intro

Compare all of that to the GeForce GTS 450, which features a GPU core clock speed of 783 MHz, and 512 MB of GDDR5 memory set to run at 902 MHz through a 128-bit bus. It also is comprised of 192 Stream Processors, 32 TAUs, and 16 Raster Operation Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

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

Memory Bandwidth

The GeForce GTS 450 should in theory perform just a bit faster than the GeForce GT 240 GDDR5 overall. (explain)

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

Texel Rate

The GeForce GTS 450 should be a lot (more or less 42%) more effective at AF than the GeForce GT 240 GDDR5. (explain)

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

Pixel Rate

The GeForce GTS 450 will be much (approximately 185%) faster with regards to AA than the GeForce GT 240 GDDR5, and should be capable of handling higher resolutions without losing too much performance. (explain)

GeForce GTS 450		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 maximum amount of information (measured in megabytes per second) that can be moved past the external memory interface within a second. The number is worked out by multiplying the card's interface width by the speed of its memory. If it uses DDR RAM, the result should be multiplied by 2 again. If DDR5, multiply by 4 instead. The better the memory bandwidth, the better 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 texture map elements (texels) that can be processed per second. This figure is calculated by multiplying the total number of texture units of the card by the core clock speed of the chip. The higher the texel rate, the better the video card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels per second.

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