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Radeon R9 280X vs Radeon R9 290X

Intro

The Radeon R9 280X features a clock frequency of 850 MHz and a GDDR5 memory speed of 1500 MHz. It also makes use of a 384-bit memory bus, and makes use of a 28 nm design. It is made up of 2048 SPUs, 128 Texture Address Units, and 32 Raster Operation Units.

Compare all of that to the Radeon R9 290X, which has a core clock frequency of 800 MHz and a GDDR5 memory speed of 1250 MHz. It also uses a 512-bit memory bus, and uses a 28 nm design. It is made up of 2816 SPUs, 176 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 290X 10609 points
Radeon R9 280X 8886 points
Difference: 1723 (19%)

Zcash Mining Hash Rate

Radeon R9 290X 369 Sol/s
Radeon R9 280X 294 Sol/s
Difference: 75 (26%)

Ethereum Mining Hash Rate

Radeon R9 290X 29 Mh/s
Radeon R9 280X 21 Mh/s
Difference: 8 (38%)

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon R9 280X 250 Watts
Radeon R9 290X 300 Watts
Difference: 50 Watts (20%)

Memory Bandwidth

As far as performance goes, the Radeon R9 290X should in theory be a little bit better than the Radeon R9 280X overall. (explain)

Radeon R9 290X 320000 MB/sec
Radeon R9 280X 288000 MB/sec
Difference: 32000 (11%)

Texel Rate

The Radeon R9 290X should be much (more or less 29%) more effective at AF than the Radeon R9 280X. (explain)

Radeon R9 290X 140800 Mtexels/sec
Radeon R9 280X 108800 Mtexels/sec
Difference: 32000 (29%)

Pixel Rate

The Radeon R9 290X should be a lot (more or less 88%) more effective at full screen anti-aliasing than the Radeon R9 280X, and able to handle higher resolutions without slowing down too much. (explain)

Radeon R9 290X 51200 Mpixels/sec
Radeon R9 280X 27200 Mpixels/sec
Difference: 24000 (88%)

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 280X

Amazon.com

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Radeon R9 290X

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 280X Radeon R9 290X
Manufacturer AMD AMD
Year October 2013 October 2013
Code Name Tahiti XTL Hawaii XT
Memory 3072 MB 4096 MB
Core Speed 850 MHz 800 MHz
Memory Speed 6000 MHz 5000 MHz
Power (Max TDP) 250 watts 300 watts
Bandwidth 288000 MB/sec 320000 MB/sec
Texel Rate 108800 Mtexels/sec 140800 Mtexels/sec
Pixel Rate 27200 Mpixels/sec 51200 Mpixels/sec
Unified Shaders 2048 2816
Texture Mapping Units 128 176
Render Output Units 32 64
Bus Type GDDR5 GDDR5
Bus Width 384-bit 512-bit
Fab Process 28 nm 28 nm
Transistors 4313 million 6200 million
Bus PCIe 3.0 x16 PCIe 3.0 x16
DirectX Version DirectX 11.2 DirectX 11.2
OpenGL Version OpenGL 4.3 OpenGL 4.3

Memory Bandwidth: Bandwidth is the largest amount of data (counted in megabytes per second) that can be transported across the external memory interface in one second. The number is worked out by multiplying the card's bus width by its memory clock speed. If the card has DDR type RAM, the result should be multiplied by 2 once again. If it uses DDR5, multiply by 4 instead. The higher the memory bandwidth, the faster the card will be in general. It especially helps with anti-aliasing, 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 calculated by multiplying the total amount of texture units of the card by the core speed of the chip. The higher the texel rate, the better the 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 number of pixels that the graphics card could possibly record to its local memory in a second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the amount of ROPs by the the card's clock speed. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel rate is also dependant on many other factors, especially the memory bandwidth of the card - the lower the memory bandwidth is, the lower the potential to reach the maximum fill rate.

Display Prices

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Radeon R9 280X

Amazon.com

Check prices at:

Radeon R9 290X

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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