GeForce GTX 850M vs Geforce GTX 770

Intro

Compare those specs to the Geforce GTX 770, which has GPU core speed of 1046 MHz, and 2048 MB of GDDR5 memory running at 1753 MHz through a 256-bit bus. It also features 1536 Stream Processors, 128 TAUs, and 32 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 770		7854 points
GeForce GTX 850M		3340 points
	Difference: 4514 (135%)

Zcash Mining Hash Rate

Geforce GTX 770		70 Sol/s
GeForce GTX 850M		49 Sol/s
	Difference: 21 (43%)

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GTX 850M		40 Watts
Geforce GTX 770		230 Watts
	Difference: 190 Watts (475%)

Memory Bandwidth

In theory, the Geforce GTX 770 should be 601% faster than the GeForce GTX 850M in general, because of its higher data rate. (explain)

Geforce GTX 770		224384 MB/sec
GeForce GTX 850M		32000 MB/sec
	Difference: 192384 (601%)

Texel Rate

The Geforce GTX 770 is a lot (about 282%) more effective at AF than the GeForce GTX 850M. (explain)

Geforce GTX 770		133888 Mtexels/sec
GeForce GTX 850M		35040 Mtexels/sec
	Difference: 98848 (282%)

Pixel Rate

The Geforce GTX 770 is much (more or less 139%) more effective at full screen anti-aliasing than the GeForce GTX 850M, and also will be capable of handling higher screen resolutions while still performing well. (explain)

Geforce GTX 770		33472 Mpixels/sec
GeForce GTX 850M		14016 Mpixels/sec
	Difference: 19456 (139%)

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 information (measured in megabytes per second) that can be moved across the external memory interface within a second. It's worked out by multiplying the card's interface width by its memory clock speed. If it uses DDR RAM, it should be multiplied by 2 again. If it uses DDR5, multiply by ANOTHER 2x. The better the memory bandwidth, the better the card will be in general. It especially helps with anti-aliasing, High Dynamic Range and high resolutions.

Texel Rate: Texel rate is the maximum number of texture map elements (texels) that are applied in one second. This number is worked out by multiplying the total amount of texture units of the card by the core speed of the chip. The higher 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 one second.

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