GeForce 820M vs Radeon R9 380 2G

Intro

Compare those specs to the Radeon R9 380 2G, which comes with clock speeds of 970 MHz on the GPU, and 1425 MHz on the 2048 MB of GDDR5 RAM. It features 1792 SPUs as well as 112 Texture Address Units and 32 ROPs.

Display Graphs

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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 380 2G		8850 points
GeForce 820M		850 points
	Difference: 8000 (941%)

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce 820M		15 Watts
Radeon R9 380 2G		190 Watts
	Difference: 175 Watts (1167%)

Memory Bandwidth

As far as performance goes, the Radeon R9 380 2G should theoretically be much better than the GeForce 820M overall. (explain)

Radeon R9 380 2G		182400 MB/sec
GeForce 820M		16000 MB/sec
	Difference: 166400 (1040%)

Texel Rate

The Radeon R9 380 2G is quite a bit (more or less 844%) better at AF than the GeForce 820M. (explain)

Radeon R9 380 2G		108640 Mtexels/sec
GeForce 820M		11504 Mtexels/sec
	Difference: 97136 (844%)

Pixel Rate

The Radeon R9 380 2G should be quite a bit (more or less 979%) faster with regards to AA than the GeForce 820M, and also will be able to handle higher resolutions without slowing down too much. (explain)

Radeon R9 380 2G		31040 Mpixels/sec
GeForce 820M		2876 Mpixels/sec
	Difference: 28164 (979%)

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

Specifications

Memory Bandwidth: Bandwidth is the largest amount of data (counted in megabytes per second) that can be transported across the external memory interface in one second. The number is worked out by multiplying the interface width by its memory clock speed. In the case of DDR memory, the result should be multiplied by 2 again. If DDR5, multiply by 4 instead. The higher the bandwidth is, the faster the card will be in general. It especially helps with anti-aliasing, HDR and higher screen resolutions.

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

Pixel Rate: Pixel rate is the maximum number of pixels the graphics card can possibly write to the local memory per second - measured in millions of pixels per second. Pixel rate 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 drawing the pixels (image) on the screen. The actual pixel output rate is also dependant on many other factors, especially the memory bandwidth - the lower the bandwidth is, the lower the ability to get to the maximum fill rate.