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Radeon R9 390X 8G vs Radeon RX 580

Intro

The Radeon R9 390X 8G has core speeds of 1050 MHz on the GPU, and 1500 MHz on the 8192 MB of GDDR5 memory. It features 2816 SPUs along with 176 TAUs and 64 Rasterization Operator Units.

Compare those specifications to the Radeon RX 580, which has a core clock speed of 1257 MHz and a GDDR5 memory frequency of 2000 MHz. It also makes use of a 256-bit bus, and makes use of a 14 nm design. It features 2304 SPUs, 144 Texture Address Units, 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.

3DMark Fire Strike Graphics Score

Radeon RX 580 13630 points
Radeon R9 390X 8G 13555 points
Difference: 75 (1%)

Zcash Mining Hash Rate

Radeon R9 390X 8G 330 Sol/s
Radeon RX 580 315 Sol/s
Difference: 15 (5%)

Ethereum Mining Hash Rate

Radeon R9 390X 8G 32 Mh/s
Radeon RX 580 28 Mh/s
Difference: 4 (14%)

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon RX 580 185 Watts
Radeon R9 390X 8G 275 Watts
Difference: 90 Watts (49%)

Memory Bandwidth

The Radeon R9 390X 8G should in theory perform much faster than the Radeon RX 580 overall. (explain)

Radeon R9 390X 8G 384000 MB/sec
Radeon RX 580 262144 MB/sec
Difference: 121856 (46%)

Texel Rate

The Radeon R9 390X 8G will be a bit (approximately 2%) faster with regards to texture filtering than the Radeon RX 580. (explain)

Radeon R9 390X 8G 184800 Mtexels/sec
Radeon RX 580 181008 Mtexels/sec
Difference: 3792 (2%)

Pixel Rate

The Radeon R9 390X 8G is much (approximately 67%) better at anti-aliasing than the Radeon RX 580, and also will be capable of handling higher screen resolutions while still performing well. (explain)

Radeon R9 390X 8G 67200 Mpixels/sec
Radeon RX 580 40224 Mpixels/sec
Difference: 26976 (67%)

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

Radeon RX 580

Amazon.com

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 580
Manufacturer AMD AMD
Year June 2015 April 2017
Code Name Grenada XT Polaris 20
Memory 8192 MB 8192 MB
Core Speed 1050 MHz 1257 MHz
Memory Speed 6000 MHz 8000 MHz
Power (Max TDP) 275 watts 185 watts
Bandwidth 384000 MB/sec 262144 MB/sec
Texel Rate 184800 Mtexels/sec 181008 Mtexels/sec
Pixel Rate 67200 Mpixels/sec 40224 Mpixels/sec
Unified Shaders 2816 2304
Texture Mapping Units 176 144
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 max amount of data (measured in megabytes per second) that can be transported past the external memory interface in one second. The number is worked out by multiplying the interface width by its memory clock speed. If the card has DDR memory, it must be multiplied by 2 once again. If DDR5, multiply by 4 instead. The better the bandwidth is, the better the card will be in general. It especially helps with AA, HDR and higher screen resolutions.

Texel Rate: Texel rate is the maximum number of texture map elements (texels) that are applied per second. This figure is worked out by multiplying the total texture units 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 processed in a second.

Pixel Rate: Pixel rate is the maximum number of pixels the video card could possibly write to its local memory in one second - measured in millions of pixels per second. The number is worked out by multiplying the number of colour ROPs by the the core 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 rate is also dependant on lots of other factors, most notably the memory bandwidth - the lower the bandwidth is, the lower the ability to reach the max fill rate.

Display Prices

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Radeon R9 390X 8G

Amazon.com

Radeon RX 580

Amazon.com

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.

Comments

One Response to “Radeon R9 390X 8G vs Radeon RX 580”
Megaman says:

I have them both.

The 390 is a dual dissipation and the 580 is a triple dissipation model.

While the 580 obviously has an edge with three fans, my 390 runs pretty hot. But its actually considered normal for the card.

I'm liking the 580 design more, it can take the punishment but it has 256 vs 512 bus speed. This cut down is also what allows the 580 to stay cooler, but as a consequence you get 32 rops instead of 64 vs the 390.

It's much easier to overclock the 580 in case anyone is wondering. If you do pick one up make sure to get the triple dissipation model, dual models are not worth it. You obviously need a mid tower for this fyi. It uses a single connector vs the double for the 390.

The card currently comes in two distinct models one is their OC line the other is for 4k users, which is kind of stupid but that's how their selling it. I OC mine by 20% (4000mhz) it stays stable and quite around 50-60c in fact you don't notice much of a difference.

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