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GeForce GTX 580 vs GeForce GTX 850M

Intro

The GeForce GTX 580 uses a 40 nm design. nVidia has clocked the core speed at 772 MHz. The GDDR5 memory works at a speed of 1002 MHz on this specific card. It features 512 SPUs along with 64 Texture Address Units and 48 ROPs.

Compare that to the GeForce GTX 850M, which features GPU clock speed of 876 MHz, and 2048 MB of DDR3 RAM set to run at 1000 MHz through a 128-bit bus. It also features 640 Stream Processors, 40 Texture Address Units, and 16 Raster Operation Units.

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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 580 4956 points
GeForce GTX 850M 3340 points
Difference: 1616 (48%)

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GTX 850M 40 Watts
GeForce GTX 580 244 Watts
Difference: 204 Watts (510%)

Memory Bandwidth

The GeForce GTX 580 should in theory be a lot faster than the GeForce GTX 850M in general. (explain)

GeForce GTX 580 192384 MB/sec
GeForce GTX 850M 32000 MB/sec
Difference: 160384 (501%)

Texel Rate

The GeForce GTX 580 should be a lot (approximately 41%) faster with regards to anisotropic filtering than the GeForce GTX 850M. (explain)

GeForce GTX 580 49408 Mtexels/sec
GeForce GTX 850M 35040 Mtexels/sec
Difference: 14368 (41%)

Pixel Rate

If using a high resolution is important to you, then the GeForce GTX 580 is a better choice, by far. (explain)

GeForce GTX 580 37056 Mpixels/sec
GeForce GTX 850M 14016 Mpixels/sec
Difference: 23040 (164%)

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

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GeForce GTX 580

Amazon.com

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GeForce GTX 850M

Amazon.com

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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

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Model GeForce GTX 580 GeForce GTX 850M
Manufacturer nVidia nVidia
Year November 2010 March 12 2014
Code Name GF110 GM107
Memory 1536 MB 2048 MB
Core Speed 772 MHz 876 MHz
Memory Speed 4008 MHz 2000 MHz
Power (Max TDP) 244 watts 40 watts
Bandwidth 192384 MB/sec 32000 MB/sec
Texel Rate 49408 Mtexels/sec 35040 Mtexels/sec
Pixel Rate 37056 Mpixels/sec 14016 Mpixels/sec
Unified Shaders 512 640
Texture Mapping Units 64 40
Render Output Units 48 16
Bus Type GDDR5 DDR3
Bus Width 384-bit 128-bit
Fab Process 40 nm 28 nm
Transistors 3000 million (Unknown) million
Bus PCIe x16 PCIe 3.0 x16
DirectX Version DirectX 11 DirectX 12
OpenGL Version OpenGL 4.1 OpenGL 4.5

Memory Bandwidth: Memory bandwidth is the max amount of information (in units of MB per second) that can be transferred over the external memory interface in a second. The number is calculated by multiplying the interface width by its memory speed. In the case of DDR RAM, it should be multiplied by 2 again. If it uses DDR5, multiply by ANOTHER 2x. The better the memory bandwidth, the faster the card will be in general. It especially helps with anti-aliasing, HDR and high resolutions.

Texel Rate: Texel rate is the maximum amount of texture map elements (texels) that are applied per second. This figure is calculated by multiplying the total amount of texture units by the core clock speed of the chip. The higher this number, the better the card will be at handling 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 graphics card could possibly write to the local memory in a second - measured in millions of pixels per second. The number is calculated by multiplying the number of colour 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 also depends on quite a few other factors, especially the memory bandwidth - the lower the bandwidth is, the lower the ability to reach the maximum fill rate.

Display Prices

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GeForce GTX 580

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.

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