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GeForce 820M vs Radeon HD 6570 (OEM) 2GB

Intro

The GeForce 820M has a GPU clock 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 Raster Operation Units.

Compare that to the Radeon HD 6570 (OEM) 2GB, which comes with a core clock frequency of 650 MHz and a GDDR5 memory frequency of 1000 MHz. It also uses a 128-bit memory bus, and uses a 40 nm design. It is made up of 480 SPUs, 24 TAUs, and 8 Raster Operation Units.

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce 820M 15 Watts
Radeon HD 6570 (OEM) 2GB 50 Watts
Difference: 35 Watts (233%)

Memory Bandwidth

The Radeon HD 6570 (OEM) 2GB, in theory, should perform quite a bit faster than the GeForce 820M in general. (explain)

Radeon HD 6570 (OEM) 2GB 64000 MB/sec
GeForce 820M 16000 MB/sec
Difference: 48000 (300%)

Texel Rate

The Radeon HD 6570 (OEM) 2GB should be much (more or less 36%) faster with regards to AF than the GeForce 820M. (explain)

Radeon HD 6570 (OEM) 2GB 15600 Mtexels/sec
GeForce 820M 11504 Mtexels/sec
Difference: 4096 (36%)

Pixel Rate

The Radeon HD 6570 (OEM) 2GB is quite a bit (more or less 81%) faster with regards to anti-aliasing than the GeForce 820M, and should be capable of handling higher resolutions without slowing down too much. (explain)

Radeon HD 6570 (OEM) 2GB 5200 Mpixels/sec
GeForce 820M 2876 Mpixels/sec
Difference: 2324 (81%)

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 6570 (OEM) 2GB

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 6570 (OEM) 2GB
Manufacturer nVidia AMD
Year February 2014 February 2011
Code Name GF117 Turks
Memory 2048 MB 1024 MB
Core Speed 719 MHz 650 MHz
Memory Speed 2000 MHz 4000 MHz
Power (Max TDP) 15 watts 50 watts
Bandwidth 16000 MB/sec 64000 MB/sec
Texel Rate 11504 Mtexels/sec 15600 Mtexels/sec
Pixel Rate 2876 Mpixels/sec 5200 Mpixels/sec
Unified Shaders 96 480
Texture Mapping Units 16 24
Render Output Units 4 8
Bus Type DDR3 GDDR5
Bus Width 64-bit 128-bit
Fab Process 28 nm 40 nm
Transistors (Unknown) million 715 million
Bus PCIe 2.0 x16 PCIe 2.1 x16
DirectX Version DirectX 12 DirectX 11
OpenGL Version OpenGL 4.5 OpenGL 4.1

Memory Bandwidth: Memory bandwidth is the max amount of information (in units of MB per second) that can be transported across the external memory interface in one second. It's calculated by multiplying the bus width by its memory clock speed. In the case of DDR RAM, the result should be multiplied by 2 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 high resolutions.

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

Pixel Rate: Pixel rate is the maximum number of pixels the video card can possibly write to its local memory in a second - measured in millions of pixels per second. The number is worked out by multiplying the amount of ROPs by the the core speed of the card. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel rate also depends on lots of other factors, especially the memory bandwidth of the card - the lower the bandwidth is, the lower the potential to get to the maximum fill rate.

Display Prices

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GeForce 820M

Amazon.com

Check prices at:

Radeon HD 6570 (OEM) 2GB

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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