GeForce GTX 870M vs Radeon R9 380 4G

Intro

Compare all that to the Radeon R9 380 4G, which makes use of a 28 nm design. AMD has set the core speed at 970 MHz. The GDDR5 RAM works at a speed of 1425 MHz on this particular card. It features 1792 SPUs along with 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 4G		8837 points
GeForce GTX 870M		4770 points
	Difference: 4067 (85%)

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GTX 870M		110 Watts
Radeon R9 380 4G		190 Watts
	Difference: 80 Watts (73%)

Memory Bandwidth

In theory, the Radeon R9 380 4G is 90% quicker than the GeForce GTX 870M in general, due to its greater data rate. (explain)

Radeon R9 380 4G		182400 MB/sec
GeForce GTX 870M		96000 MB/sec
	Difference: 86400 (90%)

Texel Rate

The Radeon R9 380 4G should be a small bit (more or less 3%) more effective at AF than the GeForce GTX 870M. (explain)

Radeon R9 380 4G		108640 Mtexels/sec
GeForce GTX 870M		105392 Mtexels/sec
	Difference: 3248 (3%)

Pixel Rate

The Radeon R9 380 4G should be a lot (approximately 37%) faster with regards to anti-aliasing than the GeForce GTX 870M, and also will be able to handle higher screen resolutions better. (explain)

Radeon R9 380 4G		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 (counted in MB per second) that can be moved across the external memory interface in one second. The number is worked out by multiplying the interface width by its memory speed. If it uses DDR type memory, it should be multiplied by 2 again. If it uses DDR5, multiply by ANOTHER 2x. The higher the memory bandwidth, the faster the card will be in general. It especially helps with AA, HDR and high resolutions.

Texel Rate: Texel rate is the maximum texture map elements (texels) that can be applied in one second. This is calculated by multiplying the total amount of texture units by the core clock 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 per second.

Pixel Rate: Pixel rate is the most pixels that the graphics chip can possibly write to its local memory per second - measured in millions of pixels per second. The figure is worked out by multiplying the amount of Raster Operations Pipelines by the clock speed of the card. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel rate is also dependant on quite a few other factors, most notably the memory bandwidth of the card - the lower the memory bandwidth is, the lower the potential to get to the max fill rate.