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GeForce GTX 850M vs Radeon HD 3470 512MB

Intro

The GeForce GTX 850M features a GPU clock speed of 876 MHz, and the 2048 MB of DDR3 memory is set to run at 1000 MHz through a 128-bit bus. It also features 640 SPUs, 40 TAUs, and 16 ROPs.

Compare that to the Radeon HD 3470 512MB, which has a core clock speed of 800 MHz and a GDDR3 memory speed of 950 MHz. It also makes use of a 128-bit bus, and uses a 55 nm design. It is made up of 40(8x5) SPUs, 4 TAUs, and 4 Raster Operation Units.

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Power Usage and Theoretical Benchmarks

Memory Bandwidth

Theoretically speaking, the GeForce GTX 850M should be 5% quicker than the Radeon HD 3470 512MB overall, because of its higher bandwidth. (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 (more or less 995%) more effective at anisotropic filtering 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

If using a high screen resolution is important to you, then the GeForce GTX 850M is the winner, and very much so. (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: Memory bandwidth is the maximum amount of information (counted in MB per second) that can be transferred over the external memory interface in a second. It's worked out by multiplying the bus width by its memory clock speed. If the card has DDR RAM, it must be multiplied by 2 again. If DDR5, multiply by 4 instead. The better the bandwidth is, the faster the card will be in general. It especially helps with AA, High Dynamic Range and high resolutions.

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

Pixel Rate: Pixel rate is the most pixels that the graphics chip can possibly write to its local memory in a second - measured in millions of pixels per second. The figure is calculated by multiplying the amount of ROPs by the the core 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 fill rate also depends on quite a few other factors, especially the memory bandwidth of the card - the lower the memory 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 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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