Radeon R9 390X 8G vs Radeon RX 480

Intro

Compare that to the Radeon RX 480, which features GPU clock speed of 1120 MHz, and 8192 MB of GDDR5 memory running at 2000 MHz through a 256-bit bus. It also is made up of 2304 Stream Processors, 144 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.

3DMark Fire Strike Graphics Score

Radeon R9 390X 8G		13555 points
Radeon RX 480		13349 points
	Difference: 206 (2%)

Zcash Mining Hash Rate

Radeon R9 390X 8G		330 Sol/s
Radeon RX 480		280 Sol/s
	Difference: 50 (18%)

Ethereum Mining Hash Rate

Radeon R9 390X 8G		32 Mh/s
Radeon RX 480		27 Mh/s
	Difference: 5 (19%)

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon RX 480		150 Watts
Radeon R9 390X 8G		275 Watts
	Difference: 125 Watts (83%)

Memory Bandwidth

In theory, the Radeon R9 390X 8G should be 46% quicker than the Radeon RX 480 overall, because of its greater data rate. (explain)

Radeon R9 390X 8G		384000 MB/sec
Radeon RX 480		262144 MB/sec
	Difference: 121856 (46%)

Texel Rate

The Radeon R9 390X 8G is a bit (more or less 15%) better at anisotropic filtering than the Radeon RX 480. (explain)

Radeon R9 390X 8G		184800 Mtexels/sec
Radeon RX 480		161280 Mtexels/sec
	Difference: 23520 (15%)

Pixel Rate

The Radeon R9 390X 8G should be a lot (about 88%) better at full screen anti-aliasing than the Radeon RX 480, and will be able to handle higher screen resolutions more effectively. (explain)

Radeon R9 390X 8G		67200 Mpixels/sec
Radeon RX 480		35840 Mpixels/sec
	Difference: 31360 (88%)

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: Bandwidth is the maximum amount of information (counted in MB per second) that can be moved across the external memory interface within a second. It's worked out by multiplying the interface width by its memory speed. If the card has DDR RAM, it must be multiplied by 2 again. If it uses DDR5, multiply by 4 instead. The better the bandwidth is, 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 texture map elements (texels) that can be applied in one second. This is calculated by multiplying the total amount of texture units of the card by the core clock speed of the chip. The higher the texel rate, the better the card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels in one second.

Pixel Rate: Pixel rate is the maximum number of pixels that the graphics chip could possibly write to its local memory in a second - measured in millions of pixels per second. Pixel rate is calculated by multiplying the number of colour ROPs by the clock speed of the card. ROPs (Raster Operations Pipelines - sometimes also referred to as Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel output rate is also dependant 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 reach the maximum fill rate.