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Radeon R9 290X vs Radeon R9 390 8G

Intro

The Radeon R9 290X makes use of a 28 nm design. AMD has clocked the core speed at 800 MHz. The GDDR5 memory runs at a frequency of 1250 MHz on this specific model. It features 2816 SPUs along with 176 Texture Address Units and 64 Rasterization Operator Units.

Compare those specs to the Radeon R9 390 8G, which features a GPU core clock speed of 1000 MHz, and 8192 MB of GDDR5 RAM running at 1500 MHz through a 512-bit bus. It also is comprised of 2560 SPUs, 160 TAUs, and 64 Raster Operation Units.

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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 390 8G 12733 points
Radeon R9 290X 10609 points
Difference: 2124 (20%)

Zcash Mining Hash Rate

Radeon R9 290X 369 Sol/s
Radeon R9 390 8G 326 Sol/s
Difference: 43 (13%)

Ethereum Mining Hash Rate

Radeon R9 290X 29 Mh/s
Radeon R9 390 8G 28 Mh/s
Difference: 1 (4%)

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon R9 390 8G 275 Watts
Radeon R9 290X 300 Watts
Difference: 25 Watts (9%)

Memory Bandwidth

Performance-wise, the Radeon R9 390 8G should theoretically be just a bit better than the Radeon R9 290X overall. (explain)

Radeon R9 390 8G 384000 MB/sec
Radeon R9 290X 320000 MB/sec
Difference: 64000 (20%)

Texel Rate

The Radeon R9 390 8G will be a small bit (about 14%) better at anisotropic filtering than the Radeon R9 290X. (explain)

Radeon R9 390 8G 160000 Mtexels/sec
Radeon R9 290X 140800 Mtexels/sec
Difference: 19200 (14%)

Pixel Rate

If using lots of anti-aliasing is important to you, then the Radeon R9 390 8G is a better choice, by far. (explain)

Radeon R9 390 8G 64000 Mpixels/sec
Radeon R9 290X 51200 Mpixels/sec
Difference: 12800 (25%)

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 290X

Amazon.com

Check prices at:

Radeon R9 390 8G

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.

Specifications

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Model Radeon R9 290X Radeon R9 390 8G
Manufacturer AMD AMD
Year October 2013 June 2015
Code Name Hawaii XT Grenada PRO
Memory 4096 MB 8192 MB
Core Speed 800 MHz 1000 MHz
Memory Speed 5000 MHz 6000 MHz
Power (Max TDP) 300 watts 275 watts
Bandwidth 320000 MB/sec 384000 MB/sec
Texel Rate 140800 Mtexels/sec 160000 Mtexels/sec
Pixel Rate 51200 Mpixels/sec 64000 Mpixels/sec
Unified Shaders 2816 2560
Texture Mapping Units 176 160
Render Output Units 64 64
Bus Type GDDR5 GDDR5
Bus Width 512-bit 512-bit
Fab Process 28 nm 28 nm
Transistors 6200 million 6200 million
Bus PCIe 3.0 x16 PCIe 3.0 ×16
DirectX Version DirectX 11.2 DirectX 12.0
OpenGL Version OpenGL 4.3 OpenGL 4.5

Memory Bandwidth: Bandwidth is the largest amount of information (counted in MB per second) that can be transferred over the external memory interface within a second. The number is calculated by multiplying the bus width by its memory clock speed. If the card has DDR type memory, the result should be multiplied by 2 again. If DDR5, multiply by ANOTHER 2x. The higher 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 amount of texture map elements (texels) that are applied in one second. This figure is worked out by multiplying the total texture units of the card by the core speed of the chip. The better this number, the better the video card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels processed per second.

Pixel Rate: Pixel rate is the maximum amount of pixels the graphics card can possibly write to the local memory in one second - measured in millions of pixels per second. The number is calculated by multiplying the number of Raster Operations Pipelines by the the core clock speed. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel rate also depends on lots of other factors, most notably the memory bandwidth of the card - the lower the bandwidth is, the lower the ability to reach the max fill rate.

Display Prices

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Radeon R9 290X

Amazon.com

Check prices at:

Radeon R9 390 8G

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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