GeForce 920M vs Radeon R9 390X 8G

Intro

Compare those specs to the Radeon R9 390X 8G, which features a GPU core clock speed of 1050 MHz, and 8192 MB of GDDR5 memory running at 1500 MHz through a 512-bit bus. It also features 2816 SPUs, 176 Texture Address Units, and 64 Raster Operation 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 920M		1180 points
	Difference: 12375 (1049%)

Power Usage and Theoretical Benchmarks

Memory Bandwidth

Theoretically, the Radeon R9 390X 8G should be quite a bit faster than the GeForce 920M overall. (explain)

Radeon R9 390X 8G		384000 MB/sec
GeForce 920M		14400 MB/sec
	Difference: 369600 (2567%)

Texel Rate

The Radeon R9 390X 8G is a lot (more or less 505%) better at anisotropic filtering than the GeForce 920M. (explain)

Radeon R9 390X 8G		184800 Mtexels/sec
GeForce 920M		30528 Mtexels/sec
	Difference: 154272 (505%)

Pixel Rate

If running with lots of anti-aliasing is important to you, then the Radeon R9 390X 8G is the winner, by a large margin. (explain)

Radeon R9 390X 8G		67200 Mpixels/sec
GeForce 920M		7632 Mpixels/sec
	Difference: 59568 (781%)

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 information (counted in MB per second) that can be transferred over the external memory interface in a second. It's worked out by multiplying the card's bus width by the speed of its memory. In the case of DDR type RAM, it should be multiplied by 2 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, High Dynamic Range and high resolutions.

Texel Rate: Texel rate is the maximum number of texture map elements (texels) that are applied per second. This number is calculated by multiplying the total number of texture units of the card by the core speed of the chip. The higher this number, the better the card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels applied per second.

Pixel Rate: Pixel rate is the maximum amount of pixels that the graphics card could possibly record to its local memory in a second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the number of ROPs by the the core clock speed. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel fill rate also depends 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 maximum fill rate.