GeForce GTX 650 vs GeForce GTX 870M

Intro

Compare those specifications to the GeForce GTX 870M, which uses a 28 nm design. nVidia has set the core frequency at 941 MHz. The GDDR5 memory works at a frequency of 1000 MHz on this specific model. It features 1344 SPUs along with 112 TAUs and 24 Rasterization Operator Units.

Display Graphs

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Benchmarks

These are real-world performance benchmarks that were submitted by Hardware Compare users. The scores seen here are the average of all benchmarks submitted for each respective test and hardware.

3DMark Fire Strike Graphics Score

GeForce GTX 870M		4770 points
GeForce GTX 650		2263 points
	Difference: 2507 (111%)

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GTX 650		64 Watts
GeForce GTX 870M		110 Watts
	Difference: 46 Watts (72%)

Memory Bandwidth

As far as performance goes, the GeForce GTX 870M should in theory be a small bit better than the GeForce GTX 650 in general. (explain)

GeForce GTX 870M		96000 MB/sec
GeForce GTX 650		80000 MB/sec
	Difference: 16000 (20%)

Texel Rate

The GeForce GTX 870M is much (more or less 211%) better at AF than the GeForce GTX 650. (explain)

GeForce GTX 870M		105392 Mtexels/sec
GeForce GTX 650		33856 Mtexels/sec
	Difference: 71536 (211%)

Pixel Rate

If running with a high resolution is important to you, then the GeForce GTX 870M is a better choice, by far. (explain)

GeForce GTX 870M		22584 Mpixels/sec
GeForce GTX 650		16928 Mpixels/sec
	Difference: 5656 (33%)

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 data (counted in MB per second) that can be transferred across the external memory interface in one second. It is calculated by multiplying the card's bus width by the speed of its memory. If the card has DDR type memory, it must be multiplied by 2 again. If DDR5, multiply by 4 instead. The higher the bandwidth is, the better the card will be in general. It especially helps with AA, High Dynamic Range and high resolutions.

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

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