GeForce GTX 780 Ti vs GeForce GTX 850M

Intro

Compare all of that to the GeForce GTX 850M, which features core speeds of 876 MHz on the GPU, and 1000 MHz on the 2048 MB of DDR3 RAM. It features 640 SPUs as well as 40 Texture Address Units and 16 Rasterization Operator 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 Ti		10900 points
GeForce GTX 850M		3340 points
	Difference: 7560 (226%)

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

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

Memory Bandwidth

In theory, the GeForce GTX 780 Ti should perform a lot faster than the GeForce GTX 850M in general. (explain)

GeForce GTX 780 Ti		336000 MB/sec
GeForce GTX 850M		32000 MB/sec
	Difference: 304000 (950%)

Texel Rate

The GeForce GTX 780 Ti is a lot (approximately 499%) faster with regards to AF than the GeForce GTX 850M. (explain)

GeForce GTX 780 Ti		210000 Mtexels/sec
GeForce GTX 850M		35040 Mtexels/sec
	Difference: 174960 (499%)

Pixel Rate

The GeForce GTX 780 Ti should be much (approximately 200%) more effective at anti-aliasing than the GeForce GTX 850M, and will be capable of handling higher screen resolutions without slowing down too much. (explain)

GeForce GTX 780 Ti		42000 Mpixels/sec
GeForce GTX 850M		14016 Mpixels/sec
	Difference: 27984 (200%)

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 largest amount of data (measured in MB per second) that can be transferred over the external memory interface in one second. The number is calculated by multiplying the card's interface width by its memory speed. If it uses DDR RAM, it should be multiplied by 2 again. If DDR5, multiply by 4 instead. The better the bandwidth is, the faster the card will be in general. It especially helps with anti-aliasing, HDR and higher screen resolutions.

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

Pixel Rate: Pixel rate is the maximum number of pixels the video card can possibly write to its local memory in a second - measured in millions of pixels per second. The number is worked out by multiplying the amount of ROPs by the the core speed of the card. ROPs (Raster Operations Pipelines - sometimes also referred to as Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel rate is also dependant on quite a few other factors, most notably the memory bandwidth of the card - the lower the bandwidth is, the lower the potential to get to the max fill rate.