GeForce 940M vs GeForce GTX 650

Intro

Compare those specifications to the GeForce GTX 650, which features a GPU core clock speed of 1058 MHz, and 1024 MB of GDDR5 memory set to run at 1250 MHz through a 128-bit bus. It also features 384 Stream Processors, 32 Texture Address Units, and 16 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 650		2263 points
GeForce 940M		1740 points
	Difference: 523 (30%)

Power Usage and Theoretical Benchmarks

Memory Bandwidth

Theoretically, the GeForce GTX 650 should be much faster than the GeForce 940M overall. (explain)

GeForce GTX 650		80000 MB/sec
GeForce 940M		16000 MB/sec
	Difference: 64000 (400%)

Texel Rate

The GeForce GTX 650 will be a lot (approximately 32%) faster with regards to AF than the GeForce 940M. (explain)

GeForce GTX 650		33856 Mtexels/sec
GeForce 940M		25728 Mtexels/sec
	Difference: 8128 (32%)

Pixel Rate

The GeForce GTX 650 will be quite a bit (approximately 97%) better at FSAA than the GeForce 940M, and able to handle higher resolutions better. (explain)

GeForce GTX 650		16928 Mpixels/sec
GeForce 940M		8576 Mpixels/sec
	Difference: 8352 (97%)

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 data (measured in MB per second) that can be transported past the external memory interface in a second. It's calculated by multiplying the card's bus width by its memory speed. If the card has DDR type RAM, 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 AA, HDR and higher screen resolutions.

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

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