GeForce GTX 870M vs Geforce GTX 770

Intro

Compare all of that to the Geforce GTX 770, which makes use of a 28 nm design. nVidia has set the core frequency at 1046 MHz. The GDDR5 RAM is set to run at a frequency of 1753 MHz on this particular card. It features 1536 SPUs along with 128 Texture Address Units and 32 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 770		7854 points
GeForce GTX 870M		4770 points
	Difference: 3084 (65%)

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GTX 870M		110 Watts
Geforce GTX 770		230 Watts
	Difference: 120 Watts (109%)

Memory Bandwidth

Theoretically, the Geforce GTX 770 should be a lot faster than the GeForce GTX 870M overall. (explain)

Geforce GTX 770		224384 MB/sec
GeForce GTX 870M		96000 MB/sec
	Difference: 128384 (134%)

Texel Rate

The Geforce GTX 770 is a lot (about 27%) better at AF than the GeForce GTX 870M. (explain)

Geforce GTX 770		133888 Mtexels/sec
GeForce GTX 870M		105392 Mtexels/sec
	Difference: 28496 (27%)

Pixel Rate

If running with a high screen resolution is important to you, then the Geforce GTX 770 is the winner, and very much so. (explain)

Geforce GTX 770		33472 Mpixels/sec
GeForce GTX 870M		22584 Mpixels/sec
	Difference: 10888 (48%)

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 maximum amount of data (measured in MB per second) that can be transferred across the external memory interface within a second. It is calculated by multiplying the card's bus width by the speed of its memory. If it uses DDR RAM, the result should be multiplied by 2 again. If DDR5, multiply by 4 instead. The better the card's memory bandwidth, the faster the card will be in general. It especially helps with AA, High Dynamic Range and higher screen resolutions.

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

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