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GeForce 820M vs Radeon HD 4670 512MB

Intro

The GeForce 820M features clock speeds of 719 MHz on the GPU, and 1000 MHz on the 2048 MB of DDR3 memory. It features 96 SPUs along with 16 Texture Address Units and 4 Rasterization Operator Units.

Compare those specifications to the Radeon HD 4670 512MB, which features a clock frequency of 750 MHz and a GDDR4/GDDR3/DDR3/DDR2 memory frequency of 1000 MHz. It also features a 128-bit bus, and makes use of a 55 nm design. It features 320(64x5) SPUs, 32 Texture Address Units, and 8 Raster Operation Units.

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

In theory, the Radeon HD 4670 512MB should perform quite a bit faster than 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 is quite a bit (more or less 109%) more effective at AF than the GeForce 820M. (explain)

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

Pixel Rate

The Radeon HD 4670 512MB is quite a bit (approximately 109%) better at AA than the GeForce 820M, and able to handle higher resolutions without losing too much performance. (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

Display Prices

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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

Display 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 largest amount of information (measured in MB per second) that can be transported over the external memory interface within a second. The number is worked out by multiplying the card's bus width by its memory speed. In the case of DDR type RAM, the result should be multiplied by 2 again. If it uses DDR5, multiply by ANOTHER 2x. The better the bandwidth is, 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 are processed in one second. This figure is calculated 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 video card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels in a second.

Pixel Rate: Pixel rate is the maximum amount of pixels that the graphics chip could possibly write to its local memory per second - measured in millions of pixels per second. The number is worked out by multiplying the number of colour ROPs by the the card's clock speed. ROPs (Raster Operations Pipelines - sometimes also referred to as Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel rate also depends on lots of other factors, most notably the memory bandwidth - the lower the 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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