GeForce GTX 870M vs Geforce GTX 780

Intro

Compare those specs to the Geforce GTX 780, which makes use of a 28 nm design. nVidia has set the core frequency at 863 MHz. The GDDR5 RAM runs at a speed of 1502 MHz on this specific card. It features 2304 SPUs as well as 192 Texture Address Units and 48 ROPs.

Display Graphs

Hide Graphs

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 780		10082 points
GeForce GTX 870M		4770 points
	Difference: 5312 (111%)

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GTX 870M		110 Watts
Geforce GTX 780		250 Watts
	Difference: 140 Watts (127%)

Memory Bandwidth

Theoretically speaking, the Geforce GTX 780 should be quite a bit faster than the GeForce GTX 870M overall. (explain)

Geforce GTX 780		288384 MB/sec
GeForce GTX 870M		96000 MB/sec
	Difference: 192384 (200%)

Texel Rate

The Geforce GTX 780 will be quite a bit (about 57%) faster with regards to texture filtering than the GeForce GTX 870M. (explain)

Geforce GTX 780		165696 Mtexels/sec
GeForce GTX 870M		105392 Mtexels/sec
	Difference: 60304 (57%)

Pixel Rate

If using lots of anti-aliasing is important to you, then the Geforce GTX 780 is the winner, by a large margin. (explain)

Geforce GTX 780		41424 Mpixels/sec
GeForce GTX 870M		22584 Mpixels/sec
	Difference: 18840 (83%)

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 megabytes per second) that can be transported across the external memory interface in one second. The number is calculated by multiplying the bus width by its memory clock speed. If it uses DDR type RAM, it should be multiplied by 2 again. If it uses DDR5, multiply by 4 instead. The higher the card's memory bandwidth, the faster the card will be in general. It especially helps with AA, HDR and higher screen resolutions.

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

Pixel Rate: Pixel rate is the most pixels the video card could possibly write to its local memory in a second - measured in millions of pixels per second. The number is calculated by multiplying the amount of ROPs by the the core clock speed. 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 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 get to the max fill rate.