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GeForce GTX 850M vs Radeon HD 3470 512MB

Intro

The GeForce GTX 850M has a core clock frequency of 876 MHz and a DDR3 memory frequency of 1000 MHz. It also uses a 128-bit bus, and uses a 28 nm design. It is made up of 640 SPUs, 40 Texture Address Units, and 16 Raster Operation Units.

Compare those specs to the Radeon HD 3470 512MB, which comes with core clock speeds of 800 MHz on the GPU, and 950 MHz on the 512 MB of GDDR3 RAM. It features 40(8x5) SPUs as well as 4 Texture Address Units and 4 ROPs.

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Power Usage and Theoretical Benchmarks

Memory Bandwidth

The GeForce GTX 850M should in theory be just a bit faster than the Radeon HD 3470 512MB in general. (explain)

GeForce GTX 850M 32000 MB/sec
Radeon HD 3470 512MB 30400 MB/sec
Difference: 1600 (5%)

Texel Rate

The GeForce GTX 850M will be a lot (about 995%) better at AF than the Radeon HD 3470 512MB. (explain)

GeForce GTX 850M 35040 Mtexels/sec
Radeon HD 3470 512MB 3200 Mtexels/sec
Difference: 31840 (995%)

Pixel Rate

The GeForce GTX 850M should be a lot (more or less 338%) more effective at AA than the Radeon HD 3470 512MB, and should be capable of handling higher resolutions better. (explain)

GeForce GTX 850M 14016 Mpixels/sec
Radeon HD 3470 512MB 3200 Mpixels/sec
Difference: 10816 (338%)

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 3470 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 850M Radeon HD 3470 512MB
Manufacturer nVidia AMD
Year March 12 2014 2008
Code Name GM107 RV620 PRO
Memory 2048 MB 512 MB
Core Speed 876 MHz 800 MHz
Memory Speed 2000 MHz 1900 MHz
Power (Max TDP) 40 watts (Unknown) watts
Bandwidth 32000 MB/sec 30400 MB/sec
Texel Rate 35040 Mtexels/sec 3200 Mtexels/sec
Pixel Rate 14016 Mpixels/sec 3200 Mpixels/sec
Unified Shaders 640 40(8x5)
Texture Mapping Units 40 4
Render Output Units 16 4
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: Bandwidth is the maximum amount of data (in units of MB per second) that can be transported over the external memory interface in a second. It is worked out by multiplying the interface width by its memory clock speed. If it uses DDR type memory, it should be multiplied by 2 once again. If DDR5, multiply by ANOTHER 2x. The better the card's memory bandwidth, the better the card will be in general. It especially helps with AA, HDR and high resolutions.

Texel Rate: Texel rate is the maximum number of texture map elements (texels) that can be processed in one second. This is calculated by multiplying the total texture units of the card by the core clock 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 applied in one second.

Pixel Rate: Pixel rate is the most pixels that the graphics card could possibly record to its local memory per 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 - also called Render Output Units) are responsible for drawing the pixels (image) on the screen. 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 potential to get to the max fill rate.

Display Prices

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GeForce GTX 850M

Amazon.com

Check prices at:

Radeon HD 3470 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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