GeForce GTX 980M vs Geforce GTX 670

Intro

Compare all of that to the Geforce GTX 670, which makes use of a 28 nm design. nVidia has set the core speed at 915 MHz. The GDDR5 memory is set to run at a speed of 1500 MHz on this model. It features 1344 SPUs along with 112 TAUs 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 980M		9476 points
Geforce GTX 670		7351 points
	Difference: 2125 (29%)

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GTX 980M		100 Watts
Geforce GTX 670		170 Watts
	Difference: 70 Watts (70%)

Memory Bandwidth

Performance-wise, the Geforce GTX 670 should in theory be much better than the GeForce GTX 980M in general. (explain)

Geforce GTX 670		192000 MB/sec
GeForce GTX 980M		128000 MB/sec
	Difference: 64000 (50%)

Texel Rate

The Geforce GTX 670 will be just a bit (approximately 3%) more effective at AF than the GeForce GTX 980M. (explain)

Geforce GTX 670		102480 Mtexels/sec
GeForce GTX 980M		99648 Mtexels/sec
	Difference: 2832 (3%)

Pixel Rate

The GeForce GTX 980M will be quite a bit (more or less 127%) more effective at AA than the Geforce GTX 670, and able to handle higher screen resolutions without losing too much performance. (explain)

GeForce GTX 980M		66432 Mpixels/sec
Geforce GTX 670		29280 Mpixels/sec
	Difference: 37152 (127%)

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 information (counted in MB per second) that can be transferred past the external memory interface in a second. It is calculated by multiplying the card's interface width by its memory clock speed. If it uses DDR type RAM, the result should be multiplied by 2 again. If it uses DDR5, multiply by 4 instead. The better 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 texture map elements (texels) that are applied per second. This figure is calculated by multiplying the total number of texture units by the core clock speed of the chip. The better the texel rate, the better the graphics card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels processed in a second.

Pixel Rate: Pixel rate is the maximum amount of pixels the graphics card could possibly write to its local memory in a second - measured in millions of pixels per second. The figure is worked out by multiplying the number of ROPs by the clock speed of the card. ROPs (Raster Operations Pipelines - sometimes also referred to as Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel fill rate also depends on lots of other factors, most notably the memory bandwidth - the lower the memory bandwidth is, the lower the potential to get to the maximum fill rate.