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GeForce GTX 850M vs Radeon HD 4670 1GB

Intro

The GeForce GTX 850M comes with a GPU core 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 is made up of 640 SPUs, 40 Texture Address Units, and 16 ROPs.

Compare all that to the Radeon HD 4670 1GB, which features a clock speed of 750 MHz and a GDDR4/GDDR3/DDR3/DDR2 memory frequency of 1100 MHz. It also features a 128-bit memory bus, and uses a 55 nm design. It is made up of 320(64x5) SPUs, 32 Texture Address Units, and 8 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GTX 850M 40 Watts
Radeon HD 4670 1GB 70 Watts
Difference: 30 Watts (75%)

Memory Bandwidth

Theoretically, the Radeon HD 4670 1GB should perform just a bit faster than the GeForce GTX 850M overall. (explain)

Radeon HD 4670 1GB 35200 MB/sec
GeForce GTX 850M 32000 MB/sec
Difference: 3200 (10%)

Texel Rate

The GeForce GTX 850M will be quite a bit (more or less 46%) faster with regards to AF than the Radeon HD 4670 1GB. (explain)

GeForce GTX 850M 35040 Mtexels/sec
Radeon HD 4670 1GB 24000 Mtexels/sec
Difference: 11040 (46%)

Pixel Rate

The GeForce GTX 850M is a lot (more or less 134%) better at anti-aliasing than the Radeon HD 4670 1GB, and also will be capable of handling higher resolutions without slowing down too much. (explain)

GeForce GTX 850M 14016 Mpixels/sec
Radeon HD 4670 1GB 6000 Mpixels/sec
Difference: 8016 (134%)

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 4670 1GB

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 4670 1GB
Manufacturer nVidia AMD
Year March 12 2014 Sep 10, 2008
Code Name GM107 RV730 XT
Memory 2048 MB 1024 MB
Core Speed 876 MHz 750 MHz
Memory Speed 2000 MHz 2200 MHz
Power (Max TDP) 40 watts 70 watts
Bandwidth 32000 MB/sec 35200 MB/sec
Texel Rate 35040 Mtexels/sec 24000 Mtexels/sec
Pixel Rate 14016 Mpixels/sec 6000 Mpixels/sec
Unified Shaders 640 320(64x5)
Texture Mapping Units 40 32
Render Output Units 16 8
Bus Type DDR3 GDDR4/GDDR3/DDR3/DDR2
Bus Width 128-bit 128-bit
Fab Process 28 nm 55 nm
Transistors (Unknown) million 514 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 maximum amount of data (measured in MB per second) that can be transported over the external memory interface in one second. The number is calculated by multiplying the interface width by the speed of its memory. If it uses DDR type memory, it should be multiplied by 2 once again. If DDR5, multiply by ANOTHER 2x. The better the memory bandwidth, the faster the card will be in general. It especially helps with AA, High Dynamic Range and higher screen resolutions.

Texel Rate: Texel rate is the maximum texture map elements (texels) that can be processed in one second. This is calculated by multiplying the total amount of texture units by the core clock speed of the chip. The better the texel rate, the better the graphics card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels in one second.

Pixel Rate: Pixel rate is the maximum number of pixels that the graphics chip could possibly record to its local memory in a second - measured in millions of pixels per second. Pixel rate is calculated by multiplying the amount of colour ROPs by the the core speed of the card. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel fill rate also depends on lots of other factors, especially the memory bandwidth - the lower the bandwidth is, the lower the ability to reach the maximum fill rate.

Display Prices

Hide Prices

GeForce GTX 850M

Amazon.com

Check prices at:

Radeon HD 4670 1GB

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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