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Radeon R9 290X vs Radeon R9 390X 8G

Intro

The Radeon R9 290X comes with a GPU clock speed of 800 MHz, and the 4096 MB of GDDR5 memory is set to run at 1250 MHz through a 512-bit bus. It also features 2816 SPUs, 176 Texture Address Units, and 64 Raster Operation Units.

Compare those specs to the Radeon R9 390X 8G, which comes with GPU clock speed of 1050 MHz, and 8192 MB of GDDR5 RAM running at 1500 MHz through a 512-bit bus. It also is comprised of 2816 Stream Processors, 176 TAUs, and 64 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 R9 390X 8G 13555 points
Radeon R9 290X 10609 points
Difference: 2946 (28%)

Zcash Mining Hash Rate

Radeon R9 290X 369 Sol/s
Radeon R9 390X 8G 330 Sol/s
Difference: 39 (12%)

Ethereum Mining Hash Rate

Radeon R9 390X 8G 32 Mh/s
Radeon R9 290X 29 Mh/s
Difference: 3 (10%)

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

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

Memory Bandwidth

Theoretically speaking, the Radeon R9 390X 8G should be just a bit faster than the Radeon R9 290X in general. (explain)

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

Texel Rate

The Radeon R9 390X 8G will be a lot (more or less 31%) better at AF than the Radeon R9 290X. (explain)

Radeon R9 390X 8G 184800 Mtexels/sec
Radeon R9 290X 140800 Mtexels/sec
Difference: 44000 (31%)

Pixel Rate

The Radeon R9 390X 8G will be quite a bit (approximately 31%) more effective at full screen anti-aliasing than the Radeon R9 290X, and will be capable of handling higher resolutions better. (explain)

Radeon R9 390X 8G 67200 Mpixels/sec
Radeon R9 290X 51200 Mpixels/sec
Difference: 16000 (31%)

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 390X 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 390X 8G
Manufacturer AMD AMD
Year October 2013 June 2015
Code Name Hawaii XT Grenada XT
Memory 4096 MB 8192 MB
Core Speed 800 MHz 1050 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 184800 Mtexels/sec
Pixel Rate 51200 Mpixels/sec 67200 Mpixels/sec
Unified Shaders 2816 2816
Texture Mapping Units 176 176
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: Memory bandwidth is the largest amount of information (measured in megabytes per second) that can be transferred past the external memory interface in one second. It's calculated by multiplying the bus width by the speed of its memory. In the case of DDR type RAM, it must be multiplied by 2 once again. If DDR5, multiply by 4 instead. The higher the card's memory bandwidth, the faster the card will be in general. It especially helps with AA, HDR and higher screen resolutions.

Texel Rate: Texel rate is the maximum 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 video card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels applied in a second.

Pixel Rate: Pixel rate is the maximum amount of pixels the video card could possibly write to the local memory in a second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the amount of colour ROPs by the the card's 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 output rate also depends on lots of other factors, most notably the memory bandwidth - the lower the memory 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 390X 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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