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GeForce 820M vs Radeon R9 285

Intro

The GeForce 820M features core speeds of 719 MHz on the GPU, and 1000 MHz on the 2048 MB of DDR3 RAM. It features 96 SPUs as well as 16 Texture Address Units and 4 Rasterization Operator Units.

Compare those specifications to the Radeon R9 285, which features a core clock frequency of 918 MHz and a GDDR5 memory frequency of 1375 MHz. It also uses a 256-bit memory bus, and uses a 28 nm design. It features 1792 SPUs, 112 Texture Address Units, 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 285 8500 points
GeForce 820M 850 points
Difference: 7650 (900%)

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce 820M 15 Watts
Radeon R9 285 190 Watts
Difference: 175 Watts (1167%)

Memory Bandwidth

Performance-wise, the Radeon R9 285 should in theory be quite a bit better than the GeForce 820M in general. (explain)

Radeon R9 285 176000 MB/sec
GeForce 820M 16000 MB/sec
Difference: 160000 (1000%)

Texel Rate

The Radeon R9 285 should be much (about 794%) better at anisotropic filtering than the GeForce 820M. (explain)

Radeon R9 285 102816 Mtexels/sec
GeForce 820M 11504 Mtexels/sec
Difference: 91312 (794%)

Pixel Rate

If using a high resolution is important to you, then the Radeon R9 285 is a better choice, by a large margin. (explain)

Radeon R9 285 29376 Mpixels/sec
GeForce 820M 2876 Mpixels/sec
Difference: 26500 (921%)

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 285

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 285
Manufacturer nVidia AMD
Year February 2014 September 2014
Code Name GF117 Tonga PRO
Memory 2048 MB 2048 MB
Core Speed 719 MHz 918 MHz
Memory Speed 2000 MHz 5500 MHz
Power (Max TDP) 15 watts 190 watts
Bandwidth 16000 MB/sec 176000 MB/sec
Texel Rate 11504 Mtexels/sec 102816 Mtexels/sec
Pixel Rate 2876 Mpixels/sec 29376 Mpixels/sec
Unified Shaders 96 1792
Texture Mapping Units 16 112
Render Output Units 4 32
Bus Type DDR3 GDDR5
Bus Width 64-bit 256-bit
Fab Process 28 nm 28 nm
Transistors (Unknown) million 5000 million
Bus PCIe 2.0 x16 PCIe 3.0 x16
DirectX Version DirectX 12 DirectX 12.0
OpenGL Version OpenGL 4.5 OpenGL 4.4

Memory Bandwidth: Bandwidth is the largest amount of information (in units of MB per second) that can be moved across the external memory interface in one second. The number is calculated by multiplying the card's interface width by its memory speed. If it uses DDR type RAM, it should be multiplied by 2 again. If it uses DDR5, multiply by ANOTHER 2x. The better the memory bandwidth, the faster the card will be in general. It especially helps with anti-aliasing, High Dynamic Range and higher screen resolutions.

Texel Rate: Texel rate is the maximum number of texture map elements (texels) that can be 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 this number, the better the video 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 amount of pixels that the graphics chip could possibly record to the local memory in a second - measured in millions of pixels per second. The number is calculated by multiplying the amount of Raster Operations Pipelines by the the card's clock speed. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel output rate is also dependant on lots of other factors, most notably the memory bandwidth of the card - the lower the bandwidth is, the lower the potential to get to the max fill rate.

Display Prices

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GeForce 820M

Amazon.com

Check prices at:

Radeon R9 285

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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