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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 RAM works at a frequency of 1000 MHz on this model. It features 640 SPUs as well as 40 TAUs and 16 ROPs.

Compare those specifications to the Radeon HD 3650, which uses a 55 nm design. AMD has set the core speed at 725 MHz. The GDDR4 RAM runs at a frequency of 800 MHz on this specific model. It features 120(24x5) SPUs as well as 8 Texture Address Units and 4 ROPs.

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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

In theory, the GeForce GTX 850M should perform quite a bit faster than the Radeon HD 3650 overall. (explain)

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

Texel Rate

The GeForce GTX 850M should be a lot (about 504%) faster with regards to anisotropic filtering 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 quite a bit (about 383%) better at anti-aliasing than the Radeon HD 3650, and also should be capable of handling higher screen resolutions without losing too much performance. (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

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Radeon HD 3650

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 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: Bandwidth is the maximum amount of information (in units of MB per second) that can be transferred across the external memory interface in one second. It's worked out by multiplying the bus width by its memory clock speed. If it uses DDR type RAM, the result should be multiplied by 2 once again. If DDR5, multiply by ANOTHER 2x. The better the card's memory bandwidth, the faster the card will be in general. It especially helps with anti-aliasing, High Dynamic Range and high resolutions.

Texel Rate: Texel rate is the maximum amount of texture map elements (texels) that are processed 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 the texel rate, the better the card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels per second.

Pixel Rate: Pixel rate is the maximum amount of pixels that the graphics card could possibly record to its local memory in one second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the amount of Render Output Units by the clock speed of the card. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel rate is also dependant on quite a few other factors, especially the memory bandwidth of the card - the lower the bandwidth is, the lower the ability to reach the max fill rate.

Display Prices

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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.

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