GeForce GT 240 GDDR5 vs GeForce GT 450 (OEM)

Intro

Compare all that to the GeForce GT 450 (OEM), which features a core clock frequency of 790 MHz and a GDDR5 memory speed of 1000 MHz. It also makes use of a 192-bit memory bus, and uses a 40 nm design. It features 144 SPUs, 24 Texture Address Units, and 24 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 GT 450 (OEM)		106 Watts
	Difference: 36 Watts (51%)

Memory Bandwidth

The GeForce GT 450 (OEM), in theory, should be a lot faster than the GeForce GT 240 GDDR5 overall. (explain)

GeForce GT 450 (OEM)		96000 MB/sec
GeForce GT 240 GDDR5		54400 MB/sec
	Difference: 41600 (76%)

Texel Rate

The GeForce GT 450 (OEM) is just a bit (more or less 8%) faster with regards to AF than the GeForce GT 240 GDDR5. (explain)

GeForce GT 450 (OEM)		18960 Mtexels/sec
GeForce GT 240 GDDR5		17600 Mtexels/sec
	Difference: 1360 (8%)

Pixel Rate

The GeForce GT 450 (OEM) will be quite a bit (more or less 331%) more effective at AA than the GeForce GT 240 GDDR5, and also should be able to handle higher screen resolutions while still performing well. (explain)

GeForce GT 450 (OEM)		18960 Mpixels/sec
GeForce GT 240 GDDR5		4400 Mpixels/sec
	Difference: 14560 (331%)

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: Bandwidth is the max amount of information (counted in megabytes per second) that can be transferred over the external memory interface within a second. The number is calculated by multiplying the card's interface width by its memory speed. In the case of DDR memory, it should be multiplied by 2 once again. If DDR5, multiply by ANOTHER 2x. The better the card's memory bandwidth, the better the card will be in general. It especially helps with anti-aliasing, HDR and high resolutions.

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

Pixel Rate: Pixel rate is the most pixels the graphics card can possibly record to its local memory per second - measured in millions of pixels per second. Pixel rate is calculated by multiplying the number of Render Output Units by the the core speed of the card. ROPs (Raster Operations Pipelines - sometimes also referred to as Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel rate also depends on quite a few other factors, especially the memory bandwidth of the card - the lower the memory bandwidth is, the lower the ability to get to the max fill rate.