GeForce GTX 850M vs Radeon R9 380 4G

Intro

Compare those specifications to the Radeon R9 380 4G, which features a clock speed of 970 MHz and a GDDR5 memory frequency of 1425 MHz. It also features a 256-bit memory bus, and makes use of a 28 nm design. It is comprised of 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

The Radeon R9 380 4G should in theory be quite a bit faster 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 will be a lot (about 210%) faster with regards to anisotropic filtering than the GeForce GTX 850M. (explain)

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

Pixel Rate

The Radeon R9 380 4G should be quite a bit (more or less 121%) faster with regards to FSAA than the GeForce GTX 850M, and able to handle higher screen resolutions more effectively. (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 maximum amount of information (counted in MB per second) that can be moved past the external memory interface in one second. It's calculated by multiplying the card's interface width by its memory clock speed. If it uses DDR RAM, it must 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 can be applied per second. This is calculated by multiplying the total number of texture units by the core speed of the chip. The higher the texel rate, the better the video card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels processed in one second.

Pixel Rate: Pixel rate is the most pixels that the graphics chip can possibly record to its local memory in a second - measured in millions of pixels per second. The figure is worked out by multiplying the amount of Render Output Units by the clock speed of the card. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel output 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.