GeForce GTS 250 512MB vs GeForce GTX 965M

Intro

Compare those specs to the GeForce GTX 965M, which features GPU core speed of 944 MHz, and 2048 MB of GDDR5 RAM running at 1000 MHz through a 128-bit bus. It also is made up of 1024 Stream Processors, 64 Texture Address Units, and 32 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GTX 965M		60 Watts
GeForce GTS 250 512MB		145 Watts
	Difference: 85 Watts (142%)

Memory Bandwidth

Performance-wise, the GeForce GTS 250 512MB should in theory be a little bit better than the GeForce GTX 965M overall. (explain)

GeForce GTS 250 512MB		70400 MB/sec
GeForce GTX 965M		64000 MB/sec
	Difference: 6400 (10%)

Texel Rate

The GeForce GTX 965M will be much (more or less 28%) better at AF than the GeForce GTS 250 512MB. (explain)

GeForce GTX 965M		60416 Mtexels/sec
GeForce GTS 250 512MB		47232 Mtexels/sec
	Difference: 13184 (28%)

Pixel Rate

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

GeForce GTX 965M		30208 Mpixels/sec
GeForce GTS 250 512MB		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 largest amount of information (in units of megabytes per second) that can be moved over the external memory interface within a second. It's worked out by multiplying the card's interface width by its memory clock speed. If it uses DDR type memory, it must be multiplied by 2 again. If it uses DDR5, multiply by 4 instead. The higher the bandwidth is, the faster the card will be in general. It especially helps with AA, High Dynamic Range and high resolutions.

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

Pixel Rate: Pixel rate is the maximum number of pixels that the graphics card could possibly write to its local memory in a second - measured in millions of pixels per second. The figure is calculated by multiplying the number of Render Output Units by the the card's clock speed. ROPs (Raster Operations Pipelines - sometimes also referred to as Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel fill rate also depends on quite a few other factors, most notably the memory bandwidth of the card - the lower the memory bandwidth is, the lower the potential to get to the max fill rate.