Radeon R9 380 2G vs Radeon R9 390X 8G

Intro

Compare those specifications to the Radeon R9 390X 8G, which comes with a GPU core clock speed of 1050 MHz, and 8192 MB of GDDR5 memory set to run at 1500 MHz through a 512-bit bus. It also features 2816 SPUs, 176 Texture Address Units, and 64 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 390X 8G		13555 points
Radeon R9 380 2G		8850 points
	Difference: 4705 (53%)

Ethereum Mining Hash Rate

Radeon R9 390X 8G		32 Mh/s
Radeon R9 380 2G		19 Mh/s
	Difference: 13 (68%)

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon R9 380 2G		190 Watts
Radeon R9 390X 8G		275 Watts
	Difference: 85 Watts (45%)

Memory Bandwidth

Performance-wise, the Radeon R9 390X 8G should in theory be quite a bit superior to the Radeon R9 380 2G in general. (explain)

Radeon R9 390X 8G		384000 MB/sec
Radeon R9 380 2G		182400 MB/sec
	Difference: 201600 (111%)

Texel Rate

The Radeon R9 390X 8G is a lot (more or less 70%) faster with regards to AF than the Radeon R9 380 2G. (explain)

Radeon R9 390X 8G		184800 Mtexels/sec
Radeon R9 380 2G		108640 Mtexels/sec
	Difference: 76160 (70%)

Pixel Rate

If using a high screen resolution is important to you, then the Radeon R9 390X 8G is superior to the Radeon R9 380 2G, by a large margin. (explain)

Radeon R9 390X 8G		67200 Mpixels/sec
Radeon R9 380 2G		31040 Mpixels/sec
	Difference: 36160 (116%)

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 (measured in megabytes per second) that can be transported past the external memory interface within a second. It is worked out by multiplying the card's interface width by the speed of its memory. If it uses DDR type RAM, it should be multiplied by 2 once again. If DDR5, multiply by ANOTHER 2x. The better the memory bandwidth, the better the card will be in general. It especially helps with AA, High Dynamic Range and high resolutions.

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