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GeForce GTX 850M vs Radeon HD 3650

Intro

The GeForce GTX 850M makes use of a 28 nm design. nVidia has set the core frequency at 876 MHz. The DDR3 memory works at a frequency of 1000 MHz on this specific card. It features 640 SPUs along with 40 Texture Address Units and 16 Rasterization Operator Units.

Compare all that to the Radeon HD 3650, which has core speeds of 725 MHz on the GPU, and 800 MHz on the 1024 MB of GDDR4 memory. It features 120(24x5) SPUs along with 8 Texture Address Units and 4 Rasterization Operator Units.

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GTX 850M 40 Watts
Radeon HD 3650 78 Watts
Difference: 38 Watts (95%)

Memory Bandwidth

Theoretically speaking, the GeForce GTX 850M is 25% faster than the Radeon HD 3650 overall, due to its higher data rate. (explain)

GeForce GTX 850M 32000 MB/sec
Radeon HD 3650 25600 MB/sec
Difference: 6400 (25%)

Texel Rate

The GeForce GTX 850M will be a lot (about 504%) faster with regards to AF than the Radeon HD 3650. (explain)

GeForce GTX 850M 35040 Mtexels/sec
Radeon HD 3650 5800 Mtexels/sec
Difference: 29240 (504%)

Pixel Rate

The GeForce GTX 850M should be much (about 383%) better at anti-aliasing than the Radeon HD 3650, and capable of handling higher screen resolutions more effectively. (explain)

GeForce GTX 850M 14016 Mpixels/sec
Radeon HD 3650 2900 Mpixels/sec
Difference: 11116 (383%)

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 3650

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 3650
Manufacturer nVidia AMD
Year March 12 2014 2008
Code Name GM107 RV635 PRO
Memory 2048 MB 1024 MB
Core Speed 876 MHz 725 MHz
Memory Speed 2000 MHz 1600 MHz
Power (Max TDP) 40 watts 78 watts
Bandwidth 32000 MB/sec 25600 MB/sec
Texel Rate 35040 Mtexels/sec 5800 Mtexels/sec
Pixel Rate 14016 Mpixels/sec 2900 Mpixels/sec
Unified Shaders 640 120(24x5)
Texture Mapping Units 40 8
Render Output Units 16 4
Bus Type DDR3 GDDR4
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/AGP 8x
DirectX Version DirectX 12 DirectX 10.1
OpenGL Version OpenGL 4.5 OpenGL 3.0

Memory Bandwidth: Memory bandwidth is the max amount of data (counted in MB per second) that can be transferred across the external memory interface in a second. It is worked out by multiplying the bus width by the speed of its memory. In the case of DDR type RAM, it must be multiplied by 2 once again. If it uses DDR5, multiply by 4 instead. The higher the card's 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 texture map elements (texels) that can be applied in one second. This is calculated by multiplying the total number of texture units by the core speed of the chip. The higher the texel rate, the better the graphics card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels processed per second.

Pixel Rate: Pixel rate is the maximum number of pixels that the graphics card can possibly record to the local memory in a second - measured in millions of pixels per second. The figure is worked out by multiplying the amount of colour ROPs by the the card's clock speed. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel output rate is also dependant on lots of other factors, most notably the memory bandwidth of the card - the lower the bandwidth is, the lower the potential to get to the max fill rate.

Display Prices

Hide Prices

GeForce GTX 850M

Amazon.com

Check prices at:

Radeon HD 3650

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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