Radeon R9 390 8G vs Radeon RX 470 4GB

Intro

Compare all of that to the Radeon RX 470 4GB, which has GPU core speed of 926 MHz, and 4096 MB of GDDR5 RAM running at 1650 MHz through a 256-bit bus. It also is comprised of 2048 SPUs, 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.

Zcash Mining Hash Rate

Radeon R9 390 8G		326 Sol/s
Radeon RX 470 4GB		270 Sol/s
	Difference: 56 (21%)

Ethereum Mining Hash Rate

Radeon R9 390 8G		28 Mh/s
Radeon RX 470 4GB		27 Mh/s
	Difference: 1 (4%)

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon RX 470 4GB		120 Watts
Radeon R9 390 8G		275 Watts
	Difference: 155 Watts (129%)

Memory Bandwidth

The Radeon R9 390 8G, in theory, should be a lot faster than the Radeon RX 470 4GB in general. (explain)

Radeon R9 390 8G		384000 MB/sec
Radeon RX 470 4GB		211200 MB/sec
	Difference: 172800 (82%)

Texel Rate

The Radeon R9 390 8G should be a lot (approximately 35%) better at texture filtering than the Radeon RX 470 4GB. (explain)

Radeon R9 390 8G		160000 Mtexels/sec
Radeon RX 470 4GB		118528 Mtexels/sec
	Difference: 41472 (35%)

Pixel Rate

The Radeon R9 390 8G is much (approximately 116%) faster with regards to FSAA than the Radeon RX 470 4GB, and also will be capable of handling higher screen resolutions while still performing well. (explain)

Radeon R9 390 8G		64000 Mpixels/sec
Radeon RX 470 4GB		29632 Mpixels/sec
	Difference: 34368 (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 data (in units of MB per second) that can be transported past the external memory interface in one second. It is worked out by multiplying the bus width by the speed of its memory. If the card has DDR RAM, it must be multiplied by 2 once again. If it uses DDR5, multiply by 4 instead. The better the bandwidth is, the faster the card will be in general. It especially helps with AA, HDR and high resolutions.

Texel Rate: Texel rate is the maximum number of texture map elements (texels) that are applied in one second. This is worked out by multiplying the total amount of texture units of the card by the core speed of the chip. The higher the texel rate, the better the video card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels in a second.

Pixel Rate: Pixel rate is the maximum amount of pixels that the graphics chip can possibly write to its local memory per second - measured in millions of pixels per second. The figure is worked out by multiplying the number of Raster Operations Pipelines by the the core clock speed. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel rate is also dependant on quite a few other factors, most notably the memory bandwidth - the lower the memory bandwidth is, the lower the ability to get to the maximum fill rate.