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GeForce GTX 850M vs Radeon HD 3690/3830

Intro

The GeForce GTX 850M comes with clock speeds of 876 MHz on the GPU, and 1000 MHz on the 2048 MB of DDR3 memory. It features 640 SPUs as well as 40 TAUs and 16 ROPs.

Compare those specifications to the Radeon HD 3690/3830, which has clock 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 Rasterization Operator Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GTX 850M 40 Watts
Radeon HD 3690/3830 75 Watts
Difference: 35 Watts (88%)

Memory Bandwidth

The GeForce GTX 850M, in theory, should perform much faster than the Radeon HD 3690/3830 in general. (explain)

GeForce GTX 850M 32000 MB/sec
Radeon HD 3690/3830 26496 MB/sec
Difference: 5504 (21%)

Texel Rate

The GeForce GTX 850M will be much (about 228%) faster with regards to anisotropic filtering than the Radeon HD 3690/3830. (explain)

GeForce GTX 850M 35040 Mtexels/sec
Radeon HD 3690/3830 10688 Mtexels/sec
Difference: 24352 (228%)

Pixel Rate

If running with a high screen resolution is important to you, then the GeForce GTX 850M is the winner, by far. (explain)

GeForce GTX 850M 14016 Mpixels/sec
Radeon HD 3690/3830 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 3690/3830

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

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Model GeForce GTX 850M Radeon HD 3690/3830
Manufacturer nVidia AMD
Year March 12 2014 2008
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 26496 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 128-bit
Fab Process 28 nm 55 nm
Transistors (Unknown) million (Unknown) million
Bus PCIe 3.0 x16 PCIe 2.0 x16
DirectX Version DirectX 12 DirectX 10.1
OpenGL Version OpenGL 4.5 OpenGL 3.0

Memory Bandwidth: Memory bandwidth is the maximum amount of information (measured in MB per second) that can be moved over the external memory interface in a second. The number is worked out by multiplying the interface width by the speed of its memory. In the case of DDR memory, it should be multiplied by 2 again. If DDR5, multiply by 4 instead. The better the memory bandwidth, the better the card will be in general. It especially helps with anti-aliasing, High Dynamic Range and higher screen resolutions.

Texel Rate: Texel rate is the maximum number of texture map elements (texels) that are applied per second. This number is worked out by multiplying the total number of texture units of the card by the core 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 a second.

Pixel Rate: Pixel rate is the maximum amount of pixels the video card can possibly write to its local memory in one second - measured in millions of pixels per second. The figure is worked out by multiplying the number of Raster Operations Pipelines by the clock speed of the card. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel output rate is also dependant on many other factors, most notably the memory bandwidth of the card - the lower the bandwidth is, the lower the ability to get to the max fill rate.

Display Prices

Hide Prices

GeForce GTX 850M

Amazon.com

Check prices at:

Radeon HD 3690/3830

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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