Radeon R9 380 4G vs Radeon R9 380X

Intro

Compare those specs to the Radeon R9 380X, which makes use of a 28 nm design. AMD has set the core speed at 970 MHz. The GDDR5 RAM is set to run at a frequency of 1425 MHz on this particular card. It features 2048 SPUs as well as 128 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.

Ethereum Mining Hash Rate

Radeon R9 380 4G		21 Mh/s
Radeon R9 380X		19 Mh/s
	Difference: 2 (11%)

3DMark Fire Strike Graphics Score

Radeon R9 380X		9519 points
Radeon R9 380 4G		8837 points
	Difference: 682 (8%)

Power Usage and Theoretical Benchmarks

Both cards have the same power consumption.

Memory Bandwidth

Both cards have the exact same bandwidth, so theoretically they should perform the same. (explain)

Texel Rate

The Radeon R9 380X is a little bit (about 14%) more effective at AF than the Radeon R9 380 4G. (explain)

Radeon R9 380X		124160 Mtexels/sec
Radeon R9 380 4G		108640 Mtexels/sec
	Difference: 15520 (14%)

Pixel Rate

Both cards have the exact same pixel rate, so in theory they should be equally good at at AA, and be able to handle the same resolutions. (explain)

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 data (measured in megabytes per second) that can be transferred past the external memory interface within a second. It is calculated by multiplying the interface width by the speed of its memory. If the card has DDR memory, the result should be multiplied by 2 again. If DDR5, multiply by ANOTHER 2x. The higher the bandwidth is, 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 is worked out by multiplying the total number of texture units of the card by the core speed of the chip. The better the texel rate, the better the card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels processed in one second.

Pixel Rate: Pixel rate is the maximum amount of pixels the graphics card could possibly write to its local memory per second - measured in millions of pixels per second. The figure is calculated by multiplying the amount of Raster Operations Pipelines by the clock speed of the card. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for filling the screen with pixels (the image). 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 reach the max fill rate.