GeForce GTX 650 vs GeForce GTX 870M

Intro

Compare those specs to the GeForce GTX 870M, which comes with GPU core speed of 941 MHz, and 3072 MB of GDDR5 RAM set to run at 1000 MHz through a 192-bit bus. It also is made up of 1344 SPUs, 112 TAUs, and 24 ROPs.

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

Theoretically speaking, the GeForce GTX 870M should be a bit faster 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 will be quite a bit (about 211%) faster with regards to anisotropic filtering than the GeForce GTX 650. (explain)

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

Pixel Rate

The GeForce GTX 870M should be a lot (more or less 33%) more effective at full screen anti-aliasing than the GeForce GTX 650, and also will be able to handle higher screen resolutions without losing too much performance. (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: Memory bandwidth is the max amount of information (measured in MB per second) that can be moved over the external memory interface in one second. The number is worked out by multiplying the bus width by its memory speed. If the card has DDR type RAM, the result should be multiplied by 2 once again. If it uses 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 amount of texture map elements (texels) that are applied in one second. This number is calculated by multiplying the total amount of texture units 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 in one second.

Pixel Rate: Pixel rate is the maximum amount of pixels that the graphics chip could possibly record to the local memory per second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the number of Raster Operations Pipelines by the clock speed of the card. 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 is also dependant on many other factors, especially the memory bandwidth - the lower the memory bandwidth is, the lower the potential to reach the max fill rate.