GeForce GTX 880M vs Radeon R9 390X 8G

Intro

Compare all that to the Radeon R9 390X 8G, which has clock speeds of 1050 MHz on the GPU, and 1500 MHz on the 8192 MB of GDDR5 RAM. It features 2816 SPUs as well as 176 TAUs and 64 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 390X 8G		13555 points
GeForce GTX 880M		6360 points
	Difference: 7195 (113%)

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GTX 880M		130 Watts
Radeon R9 390X 8G		275 Watts
	Difference: 145 Watts (112%)

Memory Bandwidth

Performance-wise, the Radeon R9 390X 8G should theoretically be quite a bit better than the GeForce GTX 880M in general. (explain)

Radeon R9 390X 8G		384000 MB/sec
GeForce GTX 880M		128000 MB/sec
	Difference: 256000 (200%)

Texel Rate

The Radeon R9 390X 8G should be quite a bit (more or less 51%) faster with regards to AF than the GeForce GTX 880M. (explain)

Radeon R9 390X 8G		184800 Mtexels/sec
GeForce GTX 880M		122112 Mtexels/sec
	Difference: 62688 (51%)

Pixel Rate

The Radeon R9 390X 8G is much (about 120%) better at FSAA than the GeForce GTX 880M, and also capable of handling higher resolutions while still performing well. (explain)

Radeon R9 390X 8G		67200 Mpixels/sec
GeForce GTX 880M		30528 Mpixels/sec
	Difference: 36672 (120%)

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 data (measured in MB per second) that can be moved past the external memory interface in a second. It's worked out by multiplying the card's bus width by the speed of its memory. If it uses DDR type memory, it 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 in one second. This figure is calculated by multiplying the total amount of texture units by the core clock speed of the chip. The higher the texel rate, the better the graphics 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 the video card could possibly write to the local memory per second - measured in millions of pixels per second. The number is worked out by multiplying the number of colour ROPs by the the core clock speed. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel output rate also depends on many other factors, most notably the memory bandwidth of the card - the lower the memory bandwidth is, the lower the ability to get to the max fill rate.