Compare any two graphics cards:
VS

GeForce 840M vs GeForce GTX 850M

Intro

The GeForce 840M uses a 28 nm design. nVidia has set the core speed at 1029 MHz. The DDR3 RAM runs at a frequency of 1000 MHz on this specific card. It features 384 SPUs along with 24 Texture Address Units and 8 ROPs.

Compare those specs to the GeForce GTX 850M, which uses a 28 nm design. nVidia has set the core frequency at 876 MHz. The DDR3 RAM runs at a frequency of 1000 MHz on this specific model. It features 640 SPUs along with 40 TAUs and 16 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 850M 3340 points
GeForce 840M 1600 points
Difference: 1740 (109%)

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce 840M 30 Watts
GeForce GTX 850M 40 Watts
Difference: 10 Watts (33%)

Memory Bandwidth

The GeForce GTX 850M, in theory, should be a lot faster than the GeForce 840M overall. (explain)

GeForce GTX 850M 32000 MB/sec
GeForce 840M 16000 MB/sec
Difference: 16000 (100%)

Texel Rate

The GeForce GTX 850M is much (more or less 42%) better at AF than the GeForce 840M. (explain)

GeForce GTX 850M 35040 Mtexels/sec
GeForce 840M 24696 Mtexels/sec
Difference: 10344 (42%)

Pixel Rate

The GeForce GTX 850M should be quite a bit (about 70%) more effective at AA than the GeForce 840M, and will be able to handle higher screen resolutions without slowing down too much. (explain)

GeForce GTX 850M 14016 Mpixels/sec
GeForce 840M 8232 Mpixels/sec
Difference: 5784 (70%)

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

Display Prices

Hide Prices

GeForce 840M

Amazon.com

Check prices at:

GeForce GTX 850M

Amazon.com

Check prices at:

Please note that the price comparisons are based on search keywords - sometimes it might show cards with very similar names that are not exactly the same as the one chosen in the comparison. We do try to filter out the wrong results as best we can, though.

Specifications

Display Specifications

Hide Specifications

Model GeForce 840M GeForce GTX 850M
Manufacturer nVidia nVidia
Year March 12 2014 March 12 2014
Code Name GM108 GM107
Memory 2048 MB 2048 MB
Core Speed 1029 MHz 876 MHz
Memory Speed 2000 MHz 2000 MHz
Power (Max TDP) 30 watts 40 watts
Bandwidth 16000 MB/sec 32000 MB/sec
Texel Rate 24696 Mtexels/sec 35040 Mtexels/sec
Pixel Rate 8232 Mpixels/sec 14016 Mpixels/sec
Unified Shaders 384 640
Texture Mapping Units 24 40
Render Output Units 8 16
Bus Type DDR3 DDR3
Bus Width 64-bit 128-bit
Fab Process 28 nm 28 nm
Transistors (Unknown) million (Unknown) million
Bus PCIe 3.0 x16 PCIe 3.0 x16
DirectX Version DirectX 12 DirectX 12
OpenGL Version OpenGL 4.5 OpenGL 4.5

Memory Bandwidth: Bandwidth is the maximum amount of data (counted in MB per second) that can be transferred over the external memory interface within a second. It's calculated by multiplying the card's bus width by its memory speed. If it uses DDR type memory, the result should be multiplied by 2 again. If DDR5, multiply by 4 instead. The higher 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 applied per second. This number is calculated by multiplying the total amount of texture units by the core speed of the chip. The better the texel rate, the better the card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels processed per second.

Pixel Rate: Pixel rate is the maximum amount of pixels that the graphics card could possibly record to the local memory in a second - measured in millions of pixels per second. The number is worked out by multiplying the amount of Raster Operations Pipelines by the the core clock speed. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel output rate is also dependant 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.

Display Prices

Hide Prices

GeForce 840M

Amazon.com

Check prices at:

GeForce GTX 850M

Amazon.com

Check prices at:

Please note that the price comparisons are based on search keywords - sometimes it might show cards with very similar names that are not exactly the same as the one chosen in the comparison. We do try to filter out the wrong results as best we can, though.

Comments

Be the first to leave a comment!

Your email address will not be published. Required fields are marked *


*

WordPress Anti Spam by WP-SpamShield