GeForce GTX 870M vs Radeon R9 380 2G

Intro

Compare those specs to the Radeon R9 380 2G, which features GPU core speed of 970 MHz, and 2048 MB of GDDR5 memory set to run at 1425 MHz through a 256-bit bus. It also is made up of 1792 Stream Processors, 112 TAUs, and 32 Raster Operation 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

Theoretically, the Radeon R9 380 2G should perform quite a bit faster than the GeForce GTX 870M in general. (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 just a 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

The Radeon R9 380 2G should be a lot (more or less 37%) more effective at FSAA than the GeForce GTX 870M, and also will be able to handle higher screen resolutions better. (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 max amount of information (in units of MB per second) that can be transferred past the external memory interface in one second. It is worked out by multiplying the card's interface width by its memory clock speed. If it uses DDR memory, the result should be multiplied by 2 once again. If it uses DDR5, multiply by ANOTHER 2x. The higher the bandwidth is, the better the card will be in general. It especially helps with AA, High Dynamic Range and higher screen resolutions.

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

Pixel Rate: Pixel rate is the most pixels the graphics card could possibly write to its local memory per second - measured in millions of pixels per second. The number is worked out by multiplying the amount of ROPs by the the card's clock speed. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel output rate also depends on many other factors, most notably the memory bandwidth - the lower the memory bandwidth is, the lower the potential to get to the max fill rate.