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GeForce GTX 850M vs Radeon HD 3850 256MB

Intro

The GeForce GTX 850M has a GPU clock speed of 876 MHz, and the 2048 MB of DDR3 RAM runs at 1000 MHz through a 128-bit bus. It also is made up of 640 Stream Processors, 40 TAUs, and 16 Raster Operation Units.

Compare those specs to the Radeon HD 3850 256MB, which has core speeds of 668 MHz on the GPU, and 828 MHz on the 256 MB of GDDR3 memory. It features 320(64x5) SPUs along with 16 TAUs and 16 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GTX 850M 40 Watts
Radeon HD 3850 256MB 75 Watts
Difference: 35 Watts (88%)

Memory Bandwidth

Performance-wise, the Radeon HD 3850 256MB should in theory be a lot superior to the GeForce GTX 850M overall. (explain)

Radeon HD 3850 256MB 52992 MB/sec
GeForce GTX 850M 32000 MB/sec
Difference: 20992 (66%)

Texel Rate

The GeForce GTX 850M should be quite a bit (approximately 228%) better at anisotropic filtering than the Radeon HD 3850 256MB. (explain)

GeForce GTX 850M 35040 Mtexels/sec
Radeon HD 3850 256MB 10688 Mtexels/sec
Difference: 24352 (228%)

Pixel Rate

The GeForce GTX 850M is a lot (more or less 31%) faster with regards to AA than the Radeon HD 3850 256MB, and should be capable of handling higher resolutions more effectively. (explain)

GeForce GTX 850M 14016 Mpixels/sec
Radeon HD 3850 256MB 10688 Mpixels/sec
Difference: 3328 (31%)

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 850M

Amazon.com

Check prices at:

Radeon HD 3850 256MB

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 850M Radeon HD 3850 256MB
Manufacturer nVidia AMD
Year March 12 2014 Nov 19, 2007
Code Name GM107 RV670 PRO
Memory 2048 MB 256 MB
Core Speed 876 MHz 668 MHz
Memory Speed 2000 MHz 1656 MHz
Power (Max TDP) 40 watts 75 watts
Bandwidth 32000 MB/sec 52992 MB/sec
Texel Rate 35040 Mtexels/sec 10688 Mtexels/sec
Pixel Rate 14016 Mpixels/sec 10688 Mpixels/sec
Unified Shaders 640 320(64x5)
Texture Mapping Units 40 16
Render Output Units 16 16
Bus Type DDR3 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: Memory bandwidth is the largest amount of information (in units of megabytes per second) that can be transferred across the external memory interface in one second. It's worked out by multiplying the card's bus width by its memory speed. If it uses DDR type RAM, it should be multiplied by 2 once again. If it uses DDR5, multiply by 4 instead. The better the memory bandwidth, the better the card will be in general. It especially helps with AA, High Dynamic Range and high resolutions.

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

Pixel Rate: Pixel rate is the maximum number of pixels that the graphics card can 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 Render Output Units by the clock speed of the card. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel rate also depends on lots of other factors, most notably the memory bandwidth of the card - the lower the bandwidth is, the lower the ability to reach the max fill rate.

Display Prices

Hide Prices

GeForce GTX 850M

Amazon.com

Check prices at:

Radeon HD 3850 256MB

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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