GeForce 820M vs Radeon R9 380 4G

Intro

Compare those specs to the Radeon R9 380 4G, which has core clock speeds of 970 MHz on the GPU, and 1425 MHz on the 4096 MB of GDDR5 memory. 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 4G		8837 points
GeForce 820M		850 points
	Difference: 7987 (940%)

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce 820M		15 Watts
Radeon R9 380 4G		190 Watts
	Difference: 175 Watts (1167%)

Memory Bandwidth

Theoretically speaking, the Radeon R9 380 4G should be a lot faster than the GeForce 820M overall. (explain)

Radeon R9 380 4G		182400 MB/sec
GeForce 820M		16000 MB/sec
	Difference: 166400 (1040%)

Texel Rate

The Radeon R9 380 4G should be quite a bit (about 844%) more effective at anisotropic filtering than the GeForce 820M. (explain)

Radeon R9 380 4G		108640 Mtexels/sec
GeForce 820M		11504 Mtexels/sec
	Difference: 97136 (844%)

Pixel Rate

The Radeon R9 380 4G will be a lot (approximately 979%) more effective at anti-aliasing than the GeForce 820M, and also will be capable of handling higher screen resolutions more effectively. (explain)

Radeon R9 380 4G		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 maximum amount of data (counted in MB per second) that can be moved across the external memory interface within a second. The number is calculated by multiplying the interface width by its memory speed. If the card has DDR memory, it must be multiplied by 2 once again. If DDR5, multiply by 4 instead. The higher 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 amount of texture map elements (texels) that are processed per second. This number is worked out by multiplying the total texture units of the card by the core clock speed of the chip. The higher this number, the better the video card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels applied per second.

Pixel Rate: Pixel rate is the maximum number of pixels the graphics card could possibly record to the local memory in a second - measured in millions of pixels per second. Pixel rate is calculated by multiplying the amount of colour ROPs by the the core clock speed. ROPs (Raster Operations Pipelines - also sometimes called 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 - the lower the memory bandwidth is, the lower the potential to get to the maximum fill rate.