GeForce GTX 870M vs Radeon R9 380 2G

Intro

Compare all that to the Radeon R9 380 2G, which features 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 TAUs and 32 Rasterization Operator Units.

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 GTX 870M		4770 points
	Difference: 4080 (86%)

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GTX 870M		110 Watts
Radeon R9 380 2G		190 Watts
	Difference: 80 Watts (73%)

Memory Bandwidth

The Radeon R9 380 2G should in theory be quite a bit faster than the GeForce GTX 870M overall. (explain)

Radeon R9 380 2G		182400 MB/sec
GeForce GTX 870M		96000 MB/sec
	Difference: 86400 (90%)

Texel Rate

The Radeon R9 380 2G should be a small bit (about 3%) better at anisotropic filtering than the GeForce GTX 870M. (explain)

Radeon R9 380 2G		108640 Mtexels/sec
GeForce GTX 870M		105392 Mtexels/sec
	Difference: 3248 (3%)

Pixel Rate

If using a high resolution is important to you, then the Radeon R9 380 2G is a better choice, by far. (explain)

Radeon R9 380 2G		31040 Mpixels/sec
GeForce GTX 870M		22584 Mpixels/sec
	Difference: 8456 (37%)

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 (in units of megabytes per second) that can be moved past the external memory interface within a second. The number is worked out by multiplying the card's interface width by its memory speed. If the card has DDR type RAM, it must be multiplied by 2 again. If DDR5, multiply by 4 instead. The higher the card's memory bandwidth, the better the card will be in general. It especially helps with AA, High Dynamic Range and high resolutions.

Texel Rate: Texel rate is the maximum number of texture map elements (texels) that are processed per second. This figure is calculated by multiplying the total texture units by the core clock speed of the chip. The higher this number, the better the card will be at 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 that the graphics chip could possibly write to the local memory per second - measured in millions of pixels per second. The number is worked out by multiplying the number 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 also depends on many other factors, especially the memory bandwidth - the lower the memory bandwidth is, the lower the potential to get to the maximum fill rate.