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GeForce 820M vs Radeon HD 4670 512MB

Intro

The GeForce 820M comes with a GPU core speed of 719 MHz, and the 2048 MB of DDR3 memory runs at 1000 MHz through a 64-bit bus. It also is made up of 96 Stream Processors, 16 TAUs, and 4 ROPs.

Compare all of that to the Radeon HD 4670 512MB, which uses a 55 nm design. AMD has clocked the core frequency at 750 MHz. The GDDR4/GDDR3/DDR3/DDR2 RAM works at a speed of 1000 MHz on this particular card. It features 320(64x5) SPUs along with 32 TAUs and 8 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce 820M 15 Watts
Radeon HD 4670 512MB 70 Watts
Difference: 55 Watts (367%)

Memory Bandwidth

Performance-wise, the Radeon HD 4670 512MB should theoretically be a lot superior to the GeForce 820M overall. (explain)

Radeon HD 4670 512MB 32000 MB/sec
GeForce 820M 16000 MB/sec
Difference: 16000 (100%)

Texel Rate

The Radeon HD 4670 512MB should be much (approximately 109%) faster with regards to AF than the GeForce 820M. (explain)

Radeon HD 4670 512MB 24000 Mtexels/sec
GeForce 820M 11504 Mtexels/sec
Difference: 12496 (109%)

Pixel Rate

If running with lots of anti-aliasing is important to you, then the Radeon HD 4670 512MB is the winner, by a large margin. (explain)

Radeon HD 4670 512MB 6000 Mpixels/sec
GeForce 820M 2876 Mpixels/sec
Difference: 3124 (109%)

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 820M

Amazon.com

Check prices at:

Radeon HD 4670 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 820M Radeon HD 4670 512MB
Manufacturer nVidia AMD
Year February 2014 Sep 10, 2008
Code Name GF117 RV730 XT
Memory 2048 MB 512 MB
Core Speed 719 MHz 750 MHz
Memory Speed 2000 MHz 2000 MHz
Power (Max TDP) 15 watts 70 watts
Bandwidth 16000 MB/sec 32000 MB/sec
Texel Rate 11504 Mtexels/sec 24000 Mtexels/sec
Pixel Rate 2876 Mpixels/sec 6000 Mpixels/sec
Unified Shaders 96 320(64x5)
Texture Mapping Units 16 32
Render Output Units 4 8
Bus Type DDR3 GDDR4/GDDR3/DDR3/DDR2
Bus Width 64-bit 128-bit
Fab Process 28 nm 55 nm
Transistors (Unknown) million 514 million
Bus PCIe 2.0 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 data (in units of megabytes per second) that can be transported over the external memory interface in one second. It is calculated by multiplying the card's bus width by its memory speed. If the card has DDR type memory, it should be multiplied by 2 again. If DDR5, multiply by 4 instead. The higher the card's 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 number of texture map elements (texels) that can be processed in one second. This number is worked out by multiplying the total texture units by the core clock speed of the chip. The higher this number, the better the card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels per second.

Pixel Rate: Pixel rate is the maximum amount of pixels the graphics card can possibly record to its local memory in a second - measured in millions of pixels per second. The number is worked out by multiplying the amount of colour ROPs by the the core 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 many other factors, most notably the memory bandwidth of the card - the lower the memory bandwidth is, the lower the potential to reach the maximum fill rate.

Display Prices

Hide Prices

GeForce 820M

Amazon.com

Check prices at:

Radeon HD 4670 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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