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Radeon R9 390X 8G vs Radeon RX 470 4GB

Intro

The Radeon R9 390X 8G makes use of a 28 nm design. AMD has clocked the core frequency at 1050 MHz. The GDDR5 RAM works at a frequency of 1500 MHz on this model. It features 2816 SPUs along with 176 Texture Address Units and 64 ROPs.

Compare those specifications to the Radeon RX 470 4GB, which has a core clock speed of 926 MHz and a GDDR5 memory speed of 1650 MHz. It also features a 256-bit bus, and uses a 14 nm design. It is made up of 2048 SPUs, 128 TAUs, and 32 ROPs.

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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 470 4GB 270 Sol/s
Difference: 60 (22%)

Ethereum Mining Hash Rate

Radeon R9 390X 8G 32 Mh/s
Radeon RX 470 4GB 27 Mh/s
Difference: 5 (19%)

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

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

Memory Bandwidth

In theory, the Radeon R9 390X 8G should be 82% quicker than the Radeon RX 470 4GB in general, because of its higher bandwidth. (explain)

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

Texel Rate

The Radeon R9 390X 8G is quite a bit (about 56%) more effective at AF than the Radeon RX 470 4GB. (explain)

Radeon R9 390X 8G 184800 Mtexels/sec
Radeon RX 470 4GB 118528 Mtexels/sec
Difference: 66272 (56%)

Pixel Rate

The Radeon R9 390X 8G is much (approximately 127%) faster with regards to FSAA than the Radeon RX 470 4GB, and able to handle higher resolutions more effectively. (explain)

Radeon R9 390X 8G 67200 Mpixels/sec
Radeon RX 470 4GB 29632 Mpixels/sec
Difference: 37568 (127%)

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

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Radeon R9 390X 8G

Amazon.com

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Radeon RX 470 4GB

Amazon.com

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Please note that the price comparisons are based on search keywords - sometimes it might show cards with very similar names that are not exactly the same as the one chosen in the comparison. We do try to filter out the wrong results as best we can, though.

Specifications

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Model Radeon R9 390X 8G Radeon RX 470 4GB
Manufacturer AMD AMD
Year June 2015 August 2016
Code Name Grenada XT Polaris 10
Memory 8192 MB 4096 MB
Core Speed 1050 MHz 926 MHz
Memory Speed 6000 MHz 6600 MHz
Power (Max TDP) 275 watts 120 watts
Bandwidth 384000 MB/sec 211200 MB/sec
Texel Rate 184800 Mtexels/sec 118528 Mtexels/sec
Pixel Rate 67200 Mpixels/sec 29632 Mpixels/sec
Unified Shaders 2816 2048
Texture Mapping Units 176 128
Render Output Units 64 32
Bus Type GDDR5 GDDR5
Bus Width 512-bit 256-bit
Fab Process 28 nm 14 nm
Transistors 6200 million 5700 million
Bus PCIe 3.0 ×16 PCIe 3.0 x16
DirectX Version DirectX 12.0 DirectX 12.0
OpenGL Version OpenGL 4.5 OpenGL 4.5

Memory Bandwidth: Bandwidth is the maximum amount of data (measured in MB per second) that can be transported over the external memory interface in one second. It's worked out by multiplying the card's bus width by its memory speed. If it uses DDR type memory, it must be multiplied by 2 again. If DDR5, multiply by 4 instead. The better the card's memory bandwidth, the better the card will be in general. It especially helps with anti-aliasing, HDR and higher screen resolutions.

Texel Rate: Texel rate is the maximum amount of texture map elements (texels) that are applied per second. This figure is calculated by multiplying the total number of texture units by the core speed of the chip. The better this number, the better the graphics card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels processed in a second.

Pixel Rate: Pixel rate is the most pixels that the graphics card could possibly record to the local memory in a second - measured in millions of pixels per second. Pixel rate is calculated by multiplying the number of Render Output Units by the the core clock speed. ROPs (Raster Operations Pipelines - sometimes also referred to as Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel fill rate is also dependant on many other factors, most notably the memory bandwidth - the lower the bandwidth is, the lower the ability to reach the maximum fill rate.

Display Prices

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Radeon R9 390X 8G

Amazon.com

Check prices at:

Radeon RX 470 4GB

Amazon.com

Check prices at:

Please note that the price comparisons are based on search keywords - sometimes it might show cards with very similar names that are not exactly the same as the one chosen in the comparison. We do try to filter out the wrong results as best we can, though.

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