GeForce GT 240 GDDR5 vs GeForce GTX 880M

Intro

Compare all that to the GeForce GTX 880M, which makes use of a 28 nm design. nVidia has set the core frequency at 954 MHz. The GDDR5 RAM works at a frequency of 1000 MHz on this card. It features 1536 SPUs as well as 128 TAUs and 32 Rasterization Operator Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GT 240 GDDR5		70 Watts
GeForce GTX 880M		130 Watts
	Difference: 60 Watts (86%)

Memory Bandwidth

In theory, the GeForce GTX 880M should be a lot faster than the GeForce GT 240 GDDR5 overall. (explain)

GeForce GTX 880M		128000 MB/sec
GeForce GT 240 GDDR5		54400 MB/sec
	Difference: 73600 (135%)

Texel Rate

The GeForce GTX 880M should be a lot (approximately 594%) faster with regards to texture filtering than the GeForce GT 240 GDDR5. (explain)

GeForce GTX 880M		122112 Mtexels/sec
GeForce GT 240 GDDR5		17600 Mtexels/sec
	Difference: 104512 (594%)

Pixel Rate

The GeForce GTX 880M is quite a bit (about 594%) faster with regards to AA than the GeForce GT 240 GDDR5, and will be able to handle higher resolutions while still performing well. (explain)

GeForce GTX 880M		30528 Mpixels/sec
GeForce GT 240 GDDR5		4400 Mpixels/sec
	Difference: 26128 (594%)

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 data (measured in MB per second) that can be transferred past the external memory interface in one second. It's worked out by multiplying the card's interface width by the speed of its memory. In the case of DDR RAM, the result should be multiplied by 2 again. If DDR5, multiply by ANOTHER 2x. The higher the memory bandwidth, the faster the card will be in general. It especially helps with anti-aliasing, HDR and higher screen resolutions.

Texel Rate: Texel rate is the maximum amount of texture map elements (texels) that can be applied per second. This number is calculated by multiplying the total number of texture units by the core clock speed of the chip. The better the texel rate, the better the card will be at 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 the graphics card can possibly write to the local memory in one second - measured in millions of pixels per second. The number is calculated by multiplying the amount of colour ROPs by the the core clock speed. ROPs (Raster Operations Pipelines - sometimes also referred to as Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel fill rate also depends on quite a few other factors, especially the memory bandwidth - the lower the memory bandwidth is, the lower the potential to reach the max fill rate.