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GeForce 820M vs Radeon R9 270

Intro

The GeForce 820M features a GPU core 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 SPUs, 16 Texture Address Units, and 4 Raster Operation Units.

Compare that to the Radeon R9 270, which has a GPU core clock speed of 900 MHz, and 2048 MB of GDDR5 RAM running at 1400 MHz through a 256-bit bus. It also features 1280 Stream Processors, 80 TAUs, and 32 Raster Operation Units.

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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 270 5943 points
GeForce 820M 850 points
Difference: 5093 (599%)

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce 820M 15 Watts
Radeon R9 270 150 Watts
Difference: 135 Watts (900%)

Memory Bandwidth

Theoretically, the Radeon R9 270 should perform much faster than the GeForce 820M overall. (explain)

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

Texel Rate

The Radeon R9 270 is a lot (more or less 526%) more effective at anisotropic filtering than the GeForce 820M. (explain)

Radeon R9 270 72000 Mtexels/sec
GeForce 820M 11504 Mtexels/sec
Difference: 60496 (526%)

Pixel Rate

If running with a high screen resolution is important to you, then the Radeon R9 270 is a better choice, by far. (explain)

Radeon R9 270 28800 Mpixels/sec
GeForce 820M 2876 Mpixels/sec
Difference: 25924 (901%)

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 R9 270

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 270
Manufacturer nVidia AMD
Year February 2014 November 2013
Code Name GF117 Curacao Pro
Memory 2048 MB 2048 MB
Core Speed 719 MHz 900 MHz
Memory Speed 2000 MHz 5600 MHz
Power (Max TDP) 15 watts 150 watts
Bandwidth 16000 MB/sec 179200 MB/sec
Texel Rate 11504 Mtexels/sec 72000 Mtexels/sec
Pixel Rate 2876 Mpixels/sec 28800 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: Bandwidth is the largest amount of data (counted in MB per second) that can be moved past 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, it should be multiplied by 2 again. If DDR5, multiply by ANOTHER 2x. The better the memory bandwidth, the better the card will be in general. It especially helps with AA, HDR and higher screen resolutions.

Texel Rate: Texel rate is the maximum texture map elements (texels) that can be applied in one second. This is calculated by multiplying the total amount 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 texture filtering (anisotropic filtering - AF). It is measured in millions of texels applied in one second.

Pixel Rate: Pixel rate is the most pixels that the graphics card can possibly record to the local memory in one second - measured in millions of pixels per second. The figure is worked out by multiplying the amount of colour ROPs by the the card's clock speed. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel rate is also dependant on lots of other factors, most notably the memory bandwidth - the lower the memory 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 270

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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