GeForce GTX 850M vs Geforce GTX 780

Intro

Compare all that to the Geforce GTX 780, which has a clock frequency of 863 MHz and a GDDR5 memory speed of 1502 MHz. It also uses a 384-bit memory bus, and makes use of a 28 nm design. It features 2304 SPUs, 192 Texture Address Units, and 48 Raster Operation Units.

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 850M		3340 points
	Difference: 6742 (202%)

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GTX 850M		40 Watts
Geforce GTX 780		250 Watts
	Difference: 210 Watts (525%)

Memory Bandwidth

The Geforce GTX 780 should theoretically be much faster than the GeForce GTX 850M in general. (explain)

Geforce GTX 780		288384 MB/sec
GeForce GTX 850M		32000 MB/sec
	Difference: 256384 (801%)

Texel Rate

The Geforce GTX 780 is a lot (about 373%) faster with regards to anisotropic filtering than the GeForce GTX 850M. (explain)

Geforce GTX 780		165696 Mtexels/sec
GeForce GTX 850M		35040 Mtexels/sec
	Difference: 130656 (373%)

Pixel Rate

If running with high levels of AA 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 850M		14016 Mpixels/sec
	Difference: 27408 (196%)

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 information (measured in megabytes per second) that can be moved past the external memory interface in a second. The number is worked out by multiplying the card's bus width by its memory speed. In the case of DDR RAM, it should be multiplied by 2 again. If DDR5, multiply by ANOTHER 2x. The better the memory bandwidth, 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 number of texture map elements (texels) that can be processed per second. This is calculated by multiplying the total number of texture units by the core speed of the chip. The better this number, the better the graphics card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels per second.

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