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GeForce GTX 860M vs Radeon HD 3850 512MB

Intro

The GeForce GTX 860M comes with core clock speeds of 797 MHz on the GPU, and 1000 MHz on the 4096 MB of GDDR5 memory. It features 1152 SPUs as well as 96 TAUs and 16 ROPs.

Compare those specifications to the Radeon HD 3850 512MB, which features GPU core speed of 668 MHz, and 512 MB of GDDR3 memory set to run at 828 MHz through a 256-bit bus. It also features 320(64x5) SPUs, 16 Texture Address Units, and 16 ROPs.

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GTX 860M 45 Watts
Radeon HD 3850 512MB 75 Watts
Difference: 30 Watts (67%)

Memory Bandwidth

Theoretically speaking, the GeForce GTX 860M should be 21% faster than the Radeon HD 3850 512MB in general, because of its greater bandwidth. (explain)

GeForce GTX 860M 64000 MB/sec
Radeon HD 3850 512MB 52992 MB/sec
Difference: 11008 (21%)

Texel Rate

The GeForce GTX 860M should be a lot (more or less 616%) better at AF than the Radeon HD 3850 512MB. (explain)

GeForce GTX 860M 76512 Mtexels/sec
Radeon HD 3850 512MB 10688 Mtexels/sec
Difference: 65824 (616%)

Pixel Rate

If using a high screen resolution is important to you, then the GeForce GTX 860M is the winner, though only just barely. (explain)

GeForce GTX 860M 12752 Mpixels/sec
Radeon HD 3850 512MB 10688 Mpixels/sec
Difference: 2064 (19%)

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 860M

Amazon.com

Check prices at:

Radeon HD 3850 512MB

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

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Model GeForce GTX 860M Radeon HD 3850 512MB
Manufacturer nVidia AMD
Year March 12 2014 Nov 19, 2007
Code Name GM107 RV670 PRO
Memory 4096 MB 512 MB
Core Speed 797 MHz 668 MHz
Memory Speed 4000 MHz 1656 MHz
Power (Max TDP) 45 watts 75 watts
Bandwidth 64000 MB/sec 52992 MB/sec
Texel Rate 76512 Mtexels/sec 10688 Mtexels/sec
Pixel Rate 12752 Mpixels/sec 10688 Mpixels/sec
Unified Shaders 1152 320(64x5)
Texture Mapping Units 96 16
Render Output Units 16 16
Bus Type GDDR5 GDDR3
Bus Width 128-bit 256-bit
Fab Process 28 nm 55 nm
Transistors (Unknown) million (Unknown) million
Bus PCIe 3.0 x16 PCIe 2.0 x16/AGP 8x
DirectX Version DirectX 12 DirectX 10.1
OpenGL Version OpenGL 4.5 OpenGL 3.0

Memory Bandwidth: Bandwidth is the max amount of data (measured in MB per second) that can be transferred across the external memory interface within a second. It is calculated by multiplying the card's bus width by its memory clock speed. If it uses DDR memory, it should be multiplied by 2 once again. If DDR5, multiply by 4 instead. The better the bandwidth is, the faster the card will be in general. It especially helps with AA, HDR and high resolutions.

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

Pixel Rate: Pixel rate is the maximum amount of pixels the graphics card could possibly write to the local memory in a second - measured in millions of pixels per second. Pixel rate is calculated by multiplying the amount of Render Output Units by the the card's clock speed. ROPs (Raster Operations Pipelines - sometimes also referred to as Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel output rate also depends on lots of other factors, especially the memory bandwidth - the lower the memory bandwidth is, the lower the ability to get to the maximum fill rate.

Display Prices

Hide Prices

GeForce GTX 860M

Amazon.com

Check prices at:

Radeon HD 3850 512MB

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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