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Radeon R9 290X vs Radeon R9 390X 8G

Intro

The Radeon R9 290X has core speeds of 800 MHz on the GPU, and 1250 MHz on the 4096 MB of GDDR5 memory. It features 2816 SPUs along with 176 Texture Address Units and 64 Rasterization Operator Units.

Compare those specifications to the Radeon R9 390X 8G, which features a clock speed of 1050 MHz and a GDDR5 memory speed of 1500 MHz. It also features a 512-bit bus, and makes use of a 28 nm design. It is comprised of 2816 SPUs, 176 Texture Address Units, 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 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

In theory, the Radeon R9 390X 8G should be 20% quicker than the Radeon R9 290X overall, because of its greater bandwidth. (explain)

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

Texel Rate

The Radeon R9 390X 8G should be a lot (approximately 31%) better at texture filtering 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 (more or less 31%) faster with regards to full screen anti-aliasing than the Radeon R9 290X, and should be able to handle higher screen resolutions while still performing well. (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 maximum amount of data (measured in megabytes per second) that can be moved past the external memory interface within a second. It's worked out by multiplying the interface width by its memory clock speed. If it uses DDR type 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 anti-aliasing, High Dynamic Range and higher screen resolutions.

Texel Rate: Texel rate is the maximum amount of texture map elements (texels) that are applied per second. This number is calculated by multiplying the total number of texture units of the card by the core clock speed of the chip. The better 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 the video card can possibly record to the local memory in one second - measured in millions of pixels per second. Pixel rate is calculated by multiplying the amount of colour ROPs by the the core clock speed. ROPs (Raster Operations Pipelines - also called 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, especially 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 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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