GeForce GTX 870M vs Radeon R9 380 4G

Intro

Compare those specs to the Radeon R9 380 4G, which comes with GPU clock speed of 970 MHz, and 4096 MB of GDDR5 memory set to run at 1425 MHz through a 256-bit bus. It also is made up of 1792 SPUs, 112 TAUs, 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 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 should be a lot faster than the GeForce GTX 870M in general. (explain)

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

Texel Rate

The Radeon R9 380 4G will be a little bit (approximately 3%) more effective at anisotropic filtering 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 (more or less 37%) more effective at AA than the GeForce GTX 870M, and should be capable of handling higher resolutions while still performing well. (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: Memory bandwidth is the largest amount of data (in units of MB per second) that can be transported over the external memory interface within a second. The number is calculated by multiplying the interface width by the speed of its memory. In the case of DDR type memory, the result should be multiplied by 2 again. If it uses DDR5, multiply by ANOTHER 2x. The higher the card's memory bandwidth, the faster the card will be in general. It especially helps with anti-aliasing, High Dynamic Range and higher screen resolutions.

Texel Rate: Texel rate is the maximum amount of texture map elements (texels) that are applied per second. This is calculated by multiplying the total amount of texture units of the card 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 processed in a second.

Pixel Rate: Pixel rate is the maximum number of pixels the graphics card can possibly write to the local memory in one second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the number of colour ROPs by the the core speed of the card. ROPs (Raster Operations Pipelines - sometimes also referred to as Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel fill rate also depends on many other factors, most notably the memory bandwidth of the card - the lower the bandwidth is, the lower the potential to reach the maximum fill rate.