GeForce GTX 465 vs GeForce GTX 980M

Intro

Compare those specs to the GeForce GTX 980M, which has a clock speed of 1038 MHz and a GDDR5 memory speed of 1000 MHz. It also features a 256-bit bus, and makes use of a 28 nm design. It features 1536 SPUs, 96 Texture Address Units, and 64 Raster Operation Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GTX 980M		100 Watts
GeForce GTX 465		200 Watts
	Difference: 100 Watts (100%)

Memory Bandwidth

In theory, the GeForce GTX 980M should be 25% quicker than the GeForce GTX 465 in general, due to its greater data rate. (explain)

GeForce GTX 980M		128000 MB/sec
GeForce GTX 465		102592 MB/sec
	Difference: 25408 (25%)

Texel Rate

The GeForce GTX 980M should be quite a bit (approximately 273%) better at anisotropic filtering than the GeForce GTX 465. (explain)

GeForce GTX 980M		99648 Mtexels/sec
GeForce GTX 465		26708 Mtexels/sec
	Difference: 72940 (273%)

Pixel Rate

If running with a high screen resolution is important to you, then the GeForce GTX 980M is the winner, by a large margin. (explain)

GeForce GTX 980M		66432 Mpixels/sec
GeForce GTX 465		19424 Mpixels/sec
	Difference: 47008 (242%)

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 data (counted in MB per second) that can be transferred across the external memory interface within a second. It's worked out by multiplying the card's interface width by its memory clock speed. If the card has DDR type memory, 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 AA, High Dynamic Range and higher screen resolutions.

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

Pixel Rate: Pixel rate is the most pixels that the graphics card could possibly write to its local memory in one second - measured in millions of pixels per second. The figure is calculated by multiplying the number of Render Output Units 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 rate also depends on lots of other factors, especially the memory bandwidth of the card - the lower the memory bandwidth is, the lower the ability to reach the maximum fill rate.