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GeForce 820M vs Radeon R9 270

Intro

The GeForce 820M comes with 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 TAUs and 4 Rasterization Operator Units.

Compare those specifications to the Radeon R9 270, which comes with core clock speeds of 900 MHz on the GPU, and 1400 MHz on the 2048 MB of GDDR5 memory. 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 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

The Radeon R9 270 should in theory perform a lot 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 will be quite a bit (about 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 using a high screen resolution is important to you, then the Radeon R9 270 is the winner, and very much so. (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 max amount of information (measured in megabytes per second) that can be moved across the external memory interface in a second. It's worked out by multiplying the card's bus width by the speed of its memory. If it uses DDR memory, the result should be multiplied by 2 once again. If DDR5, multiply by 4 instead. The better the card's memory bandwidth, the better the card will be in general. It especially helps with anti-aliasing, HDR and higher screen resolutions.

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

Pixel Rate: Pixel rate is the maximum number of pixels the graphics card can possibly write to the local memory in one second - measured in millions of pixels per second. The number is worked out by multiplying the number of Raster Operations Pipelines by the clock 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, most notably 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 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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