GeForce GTS 250 1GB vs GeForce GTX 980M

Intro

Compare those specs to the GeForce GTX 980M, which features clock speeds of 1038 MHz on the GPU, and 1000 MHz on the 4096 MB of GDDR5 RAM. It features 1536 SPUs along with 96 Texture Address Units and 64 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GTX 980M		100 Watts
GeForce GTS 250 1GB		145 Watts
	Difference: 45 Watts (45%)

Memory Bandwidth

Theoretically speaking, the GeForce GTX 980M should be 82% quicker than the GeForce GTS 250 1GB in general, because of its greater bandwidth. (explain)

GeForce GTX 980M		128000 MB/sec
GeForce GTS 250 1GB		70400 MB/sec
	Difference: 57600 (82%)

Texel Rate

The GeForce GTX 980M is a lot (approximately 111%) faster with regards to anisotropic filtering than the GeForce GTS 250 1GB. (explain)

GeForce GTX 980M		99648 Mtexels/sec
GeForce GTS 250 1GB		47232 Mtexels/sec
	Difference: 52416 (111%)

Pixel Rate

The GeForce GTX 980M is much (about 463%) faster with regards to AA than the GeForce GTS 250 1GB, and will be able to handle higher resolutions more effectively. (explain)

GeForce GTX 980M		66432 Mpixels/sec
GeForce GTS 250 1GB		11808 Mpixels/sec
	Difference: 54624 (463%)

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 maximum amount of information (counted in megabytes per second) that can be transferred over the external memory interface in a second. It's worked out by multiplying the card's bus width by the speed of its memory. If it uses DDR RAM, the result should be multiplied by 2 again. If it uses 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 are applied in one second. This number is worked out by multiplying the total amount of texture units by the core clock speed of the chip. The higher the texel rate, the better the card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels in a second.

Pixel Rate: Pixel rate is the maximum number of pixels that the graphics chip can possibly record to its local memory in one second - measured in millions of pixels per second. The figure is calculated by multiplying the amount of Render Output Units by the the card's clock speed. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel fill rate also depends on many other factors, most notably the memory bandwidth - the lower the memory bandwidth is, the lower the ability to reach the max fill rate.