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GeForce 820M vs Radeon R9 270X

Intro

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

Compare those specs to the Radeon R9 270X, which features clock speeds of 1000 MHz on the GPU, and 1400 MHz on the 2048 MB of GDDR5 RAM. It features 1280 SPUs as well as 80 Texture Address Units and 32 ROPs.

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Benchmarks

These are real-world performance benchmarks that were submitted by Hardware Compare users. The scores seen here are the average of all benchmarks submitted for each respective test and hardware.

3DMark Fire Strike Graphics Score

Radeon R9 270X 6590 points
GeForce 820M 850 points
Difference: 5740 (675%)

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce 820M 15 Watts
Radeon R9 270X 180 Watts
Difference: 165 Watts (1100%)

Memory Bandwidth

Theoretically, the Radeon R9 270X should be a lot faster than the GeForce 820M overall. (explain)

Radeon R9 270X 179200 MB/sec
GeForce 820M 16000 MB/sec
Difference: 163200 (1020%)

Texel Rate

The Radeon R9 270X should be a lot (approximately 595%) more effective at anisotropic filtering than the GeForce 820M. (explain)

Radeon R9 270X 80000 Mtexels/sec
GeForce 820M 11504 Mtexels/sec
Difference: 68496 (595%)

Pixel Rate

The Radeon R9 270X is quite a bit (approximately 1013%) better at FSAA than the GeForce 820M, and able to handle higher screen resolutions while still performing well. (explain)

Radeon R9 270X 32000 Mpixels/sec
GeForce 820M 2876 Mpixels/sec
Difference: 29124 (1013%)

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

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Radeon R9 270X

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 R9 270X
Manufacturer nVidia AMD
Year February 2014 October 2013
Code Name GF117 Curacao XT
Memory 2048 MB 2048 MB
Core Speed 719 MHz 1000 MHz
Memory Speed 2000 MHz 5600 MHz
Power (Max TDP) 15 watts 180 watts
Bandwidth 16000 MB/sec 179200 MB/sec
Texel Rate 11504 Mtexels/sec 80000 Mtexels/sec
Pixel Rate 2876 Mpixels/sec 32000 Mpixels/sec
Unified Shaders 96 1280
Texture Mapping Units 16 80
Render Output Units 4 32
Bus Type DDR3 GDDR5
Bus Width 64-bit 256-bit
Fab Process 28 nm 28 nm
Transistors (Unknown) million 2800 million
Bus PCIe 2.0 x16 PCIe 3.0 x16
DirectX Version DirectX 12 DirectX 11.2
OpenGL Version OpenGL 4.5 OpenGL 4.3

Memory Bandwidth: Memory bandwidth is the largest amount of information (in units of megabytes per second) that can be transported past the external memory interface in one second. The number is calculated by multiplying the card's bus width by its memory clock speed. If the card has DDR memory, 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, High Dynamic Range and higher screen resolutions.

Texel Rate: Texel rate is the maximum amount of texture map elements (texels) that are applied per second. This is calculated by multiplying the total amount of texture units by the core speed of the chip. The better the texel rate, the better the graphics card will be at 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 that the graphics card can possibly write to its local memory in one second - measured in millions of pixels per second. The figure is worked out by multiplying the amount of Raster Operations Pipelines 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 rate also depends on lots of other factors, especially the memory bandwidth of the card - the lower the bandwidth is, the lower the ability to reach the maximum fill rate.

Display Prices

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GeForce 820M

Amazon.com

Check prices at:

Radeon R9 270X

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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