GeForce GTX 850M vs Radeon R9 380 4G

Intro

Compare those specs to the Radeon R9 380 4G, which comes with a clock speed of 970 MHz and a GDDR5 memory frequency of 1425 MHz. It also uses a 256-bit memory bus, and makes use of a 28 nm design. It features 1792 SPUs, 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 GTX 850M		3340 points
	Difference: 5497 (165%)

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GTX 850M		40 Watts
Radeon R9 380 4G		190 Watts
	Difference: 150 Watts (375%)

Memory Bandwidth

As far as performance goes, the Radeon R9 380 4G should theoretically be a lot better than the GeForce GTX 850M in general. (explain)

Radeon R9 380 4G		182400 MB/sec
GeForce GTX 850M		32000 MB/sec
	Difference: 150400 (470%)

Texel Rate

The Radeon R9 380 4G is quite a bit (about 210%) more effective at AF than the GeForce GTX 850M. (explain)

Radeon R9 380 4G		108640 Mtexels/sec
GeForce GTX 850M		35040 Mtexels/sec
	Difference: 73600 (210%)

Pixel Rate

If using a high screen resolution is important to you, then the Radeon R9 380 4G is superior to the GeForce GTX 850M, and very much so. (explain)

Radeon R9 380 4G		31040 Mpixels/sec
GeForce GTX 850M		14016 Mpixels/sec
	Difference: 17024 (121%)

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 max amount of information (in units of megabytes per second) that can be transported past the external memory interface in one second. It is worked out by multiplying the bus width by the speed of its memory. If it uses DDR type memory, it should be multiplied by 2 once again. If it uses DDR5, multiply by 4 instead. The higher the card's memory bandwidth, the better the card will be in general. It especially helps with anti-aliasing, HDR and high resolutions.

Texel Rate: Texel rate is the maximum amount of texture map elements (texels) that are processed in one second. This figure is calculated by multiplying the total texture units by the core speed of the chip. The higher 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 maximum amount of pixels the graphics card could possibly record to the local memory in a second - measured in millions of pixels per second. The number is worked out by multiplying the amount of colour ROPs by the the core clock speed. ROPs (Raster Operations Pipelines - sometimes also referred to as Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel fill rate also depends on quite a few other factors, most notably the memory bandwidth of the card - the lower the bandwidth is, the lower the ability to get to the max fill rate.