Radeon R9 390X 8G vs Radeon RX 480 4GB

Intro

Compare those specs to the Radeon RX 480 4GB, which has a GPU core clock speed of 1120 MHz, and 4096 MB of GDDR5 memory running at 1750 MHz through a 256-bit bus. It also is comprised of 2304 SPUs, 144 TAUs, and 32 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.

Zcash Mining Hash Rate

Radeon R9 390X 8G		330 Sol/s
Radeon RX 480 4GB		267 Sol/s
	Difference: 63 (24%)

Ethereum Mining Hash Rate

Radeon R9 390X 8G		32 Mh/s
Radeon RX 480 4GB		25 Mh/s
	Difference: 7 (28%)

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon RX 480 4GB		150 Watts
Radeon R9 390X 8G		275 Watts
	Difference: 125 Watts (83%)

Memory Bandwidth

In theory, the Radeon R9 390X 8G should be 67% faster than the Radeon RX 480 4GB overall, because of its higher data rate. (explain)

Radeon R9 390X 8G		384000 MB/sec
Radeon RX 480 4GB		229376 MB/sec
	Difference: 154624 (67%)

Texel Rate

The Radeon R9 390X 8G is a little bit (about 15%) better at anisotropic filtering than the Radeon RX 480 4GB. (explain)

Radeon R9 390X 8G		184800 Mtexels/sec
Radeon RX 480 4GB		161280 Mtexels/sec
	Difference: 23520 (15%)

Pixel Rate

The Radeon R9 390X 8G will be a lot (about 88%) more effective at FSAA than the Radeon RX 480 4GB, and should be capable of handling higher resolutions while still performing well. (explain)

Radeon R9 390X 8G		67200 Mpixels/sec
Radeon RX 480 4GB		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 max amount of data (measured in megabytes per second) that can be transferred past the external memory interface in one second. It is calculated by multiplying the interface width by the speed of its memory. If it uses DDR type memory, the result should be multiplied by 2 again. If DDR5, multiply by ANOTHER 2x. The higher the memory bandwidth, the better 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 texture map elements (texels) that are processed in one second. This figure is worked out by multiplying the total number of texture units of the card by the core clock speed of the chip. The higher 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 one second.

Pixel Rate: Pixel rate is the most pixels that the graphics chip could possibly write to the local memory in a second - measured in millions of pixels per second. The figure is worked out by multiplying the number of ROPs by the the card's clock speed. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel output rate is also dependant on quite a few other factors, especially the memory bandwidth - the lower the bandwidth is, the lower the ability to get to the maximum fill rate.