Radeon R9 380X vs Radeon RX 580

Intro

Compare those specs to the Radeon RX 580, which has GPU core speed of 1257 MHz, and 8192 MB of GDDR5 memory set to run at 2000 MHz through a 256-bit bus. It also is comprised of 2304 SPUs, 144 TAUs, 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 RX 580		13630 points
Radeon R9 380X		9519 points
	Difference: 4111 (43%)

Ethereum Mining Hash Rate

Radeon RX 580		28 Mh/s
Radeon R9 380X		19 Mh/s
	Difference: 9 (47%)

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon RX 580		185 Watts
Radeon R9 380X		190 Watts
	Difference: 5 Watts (3%)

Memory Bandwidth

In theory, the Radeon RX 580 will be 44% quicker than the Radeon R9 380X overall, due to its higher bandwidth. (explain)

Radeon RX 580		262144 MB/sec
Radeon R9 380X		182400 MB/sec
	Difference: 79744 (44%)

Texel Rate

The Radeon RX 580 should be quite a bit (approximately 46%) better at texture filtering than the Radeon R9 380X. (explain)

Radeon RX 580		181008 Mtexels/sec
Radeon R9 380X		124160 Mtexels/sec
	Difference: 56848 (46%)

Pixel Rate

If using a high screen resolution is important to you, then the Radeon RX 580 is superior to the Radeon R9 380X, by a large margin. (explain)

Radeon RX 580		40224 Mpixels/sec
Radeon R9 380X		31040 Mpixels/sec
	Difference: 9184 (30%)

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 megabytes per second) that can be transferred over the external memory interface within a second. It is worked out by multiplying the card's interface width by its memory clock speed. In the case of DDR memory, the result should be multiplied by 2 once 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 AA, High Dynamic Range and high resolutions.

Texel Rate: Texel rate is the maximum number of texture map elements (texels) that can be applied in one second. This is calculated by multiplying the total texture units of the card by the core clock speed of the chip. The better this number, the better the video 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 number of pixels the graphics card can possibly record to its local memory per second - measured in millions of pixels per second. The figure is worked out by multiplying the amount of Raster Operations Pipelines 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, especially the memory bandwidth of the card - the lower the memory bandwidth is, the lower the ability to get to the max fill rate.