GeForce GTX 850M vs Geforce GTX 670

Intro

Compare those specifications to the Geforce GTX 670, which comes with a core clock frequency of 915 MHz and a GDDR5 memory speed of 1500 MHz. It also features a 256-bit memory bus, and makes use of a 28 nm design. It is made up of 1344 SPUs, 112 Texture Address Units, and 32 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 670		7351 points
GeForce GTX 850M		3340 points
	Difference: 4011 (120%)

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GTX 850M		40 Watts
Geforce GTX 670		170 Watts
	Difference: 130 Watts (325%)

Memory Bandwidth

The Geforce GTX 670 should theoretically be quite a bit faster than the GeForce GTX 850M in general. (explain)

Geforce GTX 670		192000 MB/sec
GeForce GTX 850M		32000 MB/sec
	Difference: 160000 (500%)

Texel Rate

The Geforce GTX 670 will be quite a bit (more or less 192%) better at texture filtering than the GeForce GTX 850M. (explain)

Geforce GTX 670		102480 Mtexels/sec
GeForce GTX 850M		35040 Mtexels/sec
	Difference: 67440 (192%)

Pixel Rate

If running with a high resolution is important to you, then the Geforce GTX 670 is the winner, by far. (explain)

Geforce GTX 670		29280 Mpixels/sec
GeForce GTX 850M		14016 Mpixels/sec
	Difference: 15264 (109%)

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 data (measured in MB per second) that can be transported over the external memory interface in one second. It's calculated by multiplying the card's interface width by its memory clock speed. In the case of DDR memory, it must be multiplied by 2 again. If DDR5, multiply by ANOTHER 2x. The better the bandwidth is, the faster the card will be in general. It especially helps with anti-aliasing, High Dynamic Range and high resolutions.

Texel Rate: Texel rate is the maximum amount of texture map elements (texels) that can be processed per second. This is calculated by multiplying the total amount of texture units by the core speed of the chip. The higher the texel rate, the better the video 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 the graphics card can possibly record to its local memory in a second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the amount of colour ROPs by the the core 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 fill rate is also dependant on many other factors, most notably the memory bandwidth - the lower the memory bandwidth is, the lower the potential to reach the maximum fill rate.