GeForce GTS 250 1GB vs GeForce GTX 965M

Intro

Compare all of that to the GeForce GTX 965M, which has clock speeds of 944 MHz on the GPU, and 1000 MHz on the 2048 MB of GDDR5 RAM. It features 1024 SPUs as well as 64 TAUs and 32 Rasterization Operator Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GTX 965M		60 Watts
GeForce GTS 250 1GB		145 Watts
	Difference: 85 Watts (142%)

Memory Bandwidth

Performance-wise, the GeForce GTS 250 1GB should theoretically be a small bit better than the GeForce GTX 965M overall. (explain)

GeForce GTS 250 1GB		70400 MB/sec
GeForce GTX 965M		64000 MB/sec
	Difference: 6400 (10%)

Texel Rate

The GeForce GTX 965M will be quite a bit (more or less 28%) better at AF than the GeForce GTS 250 1GB. (explain)

GeForce GTX 965M		60416 Mtexels/sec
GeForce GTS 250 1GB		47232 Mtexels/sec
	Difference: 13184 (28%)

Pixel Rate

If running with a high resolution is important to you, then the GeForce GTX 965M is the winner, and very much so. (explain)

GeForce GTX 965M		30208 Mpixels/sec
GeForce GTS 250 1GB		11808 Mpixels/sec
	Difference: 18400 (156%)

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 (in units of MB per second) that can be transported across the external memory interface within a second. It is calculated by multiplying the card's bus width by its memory clock speed. If it uses DDR type memory, it must be multiplied by 2 once again. If DDR5, multiply by 4 instead. The higher the bandwidth is, the better the card will be in general. It especially helps with anti-aliasing, HDR and higher screen resolutions.

Texel Rate: Texel rate is the maximum number of texture map elements (texels) that are applied per second. This number is calculated by multiplying the total number of texture units of the card by the core speed of the chip. The better this number, the better the graphics 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 amount of pixels that the graphics card could possibly record to the local memory in a second - measured in millions of pixels per second. Pixel rate 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 outputting the pixels (image) to the screen. The actual pixel rate also depends on many other factors, especially the memory bandwidth - the lower the bandwidth is, the lower the ability to reach the max fill rate.