GeForce GTS 250 1GB vs GeForce GTX 880M

Intro

Compare all of that to the GeForce GTX 880M, which features core speeds of 954 MHz on the GPU, and 1000 MHz on the 4096 MB of GDDR5 RAM. It features 1536 SPUs as well as 128 Texture Address Units and 32 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GTX 880M		130 Watts
GeForce GTS 250 1GB		145 Watts
	Difference: 15 Watts (12%)

Memory Bandwidth

Theoretically speaking, the GeForce GTX 880M will be 82% faster than the GeForce GTS 250 1GB in general, because of its greater data rate. (explain)

GeForce GTX 880M		128000 MB/sec
GeForce GTS 250 1GB		70400 MB/sec
	Difference: 57600 (82%)

Texel Rate

The GeForce GTX 880M will be much (more or less 159%) better at anisotropic filtering than the GeForce GTS 250 1GB. (explain)

GeForce GTX 880M		122112 Mtexels/sec
GeForce GTS 250 1GB		47232 Mtexels/sec
	Difference: 74880 (159%)

Pixel Rate

The GeForce GTX 880M should be a lot (about 159%) better at FSAA than the GeForce GTS 250 1GB, and also will be able to handle higher resolutions without losing too much performance. (explain)

GeForce GTX 880M		30528 Mpixels/sec
GeForce GTS 250 1GB		11808 Mpixels/sec
	Difference: 18720 (159%)

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 transported past the external memory interface within a second. The number is calculated by multiplying the interface width by its memory speed. In the case of DDR RAM, the result should be multiplied by 2 again. If it uses DDR5, multiply by ANOTHER 2x. The higher the card's memory bandwidth, the faster the card will be in general. It especially helps with anti-aliasing, HDR and high resolutions.

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

Pixel Rate: Pixel rate is the maximum amount of pixels that the graphics card can possibly write to the local memory in one second - measured in millions of pixels per second. The figure is calculated by multiplying the number of Raster Operations Pipelines by the the core clock speed. 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 fill rate is also dependant on quite a few other factors, most notably the memory bandwidth - the lower the bandwidth is, the lower the potential to get to the maximum fill rate.