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Radeon R9 280 vs Radeon R9 280X

Intro

The Radeon R9 280 comes with a GPU core speed of 933 MHz, and the 3072 MB of GDDR5 RAM runs at 1250 MHz through a 384-bit bus. It also is comprised of 1792 SPUs, 112 Texture Address Units, and 32 ROPs.

Compare all of that to the Radeon R9 280X, which features a core clock speed of 850 MHz and a GDDR5 memory frequency of 1500 MHz. It also uses a 384-bit memory bus, and makes use of a 28 nm design. It features 2048 SPUs, 128 TAUs, 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 R9 280X 8886 points
Radeon R9 280 7961 points
Difference: 925 (12%)

Zcash Mining Hash Rate

Radeon R9 280X 294 Sol/s
Radeon R9 280 183 Sol/s
Difference: 111 (61%)

Ethereum Mining Hash Rate

Radeon R9 280 22 Mh/s
Radeon R9 280X 21 Mh/s
Difference: 1 (5%)

Power Usage and Theoretical Benchmarks

Both cards have the same power consumption.

Memory Bandwidth

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

Radeon R9 280X 288000 MB/sec
Radeon R9 280 240000 MB/sec
Difference: 48000 (20%)

Texel Rate

The Radeon R9 280X will be a little bit (more or less 4%) faster with regards to anisotropic filtering than the Radeon R9 280. (explain)

Radeon R9 280X 108800 Mtexels/sec
Radeon R9 280 104496 Mtexels/sec
Difference: 4304 (4%)

Pixel Rate

The Radeon R9 280 will be a small bit (more or less 10%) more effective at anti-aliasing than the Radeon R9 280X, and able to handle higher resolutions more effectively. (explain)

Radeon R9 280 29856 Mpixels/sec
Radeon R9 280X 27200 Mpixels/sec
Difference: 2656 (10%)

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 280

Amazon.com

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Radeon R9 280X

Amazon.com

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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 280 Radeon R9 280X
Manufacturer AMD AMD
Year March 2014 October 2013
Code Name Tahiti Pro Tahiti XTL
Memory 3072 MB 3072 MB
Core Speed 933 MHz 850 MHz
Memory Speed 5000 MHz 6000 MHz
Power (Max TDP) 250 watts 250 watts
Bandwidth 240000 MB/sec 288000 MB/sec
Texel Rate 104496 Mtexels/sec 108800 Mtexels/sec
Pixel Rate 29856 Mpixels/sec 27200 Mpixels/sec
Unified Shaders 1792 2048
Texture Mapping Units 112 128
Render Output Units 32 32
Bus Type GDDR5 GDDR5
Bus Width 384-bit 384-bit
Fab Process 28 nm 28 nm
Transistors 4313 million 4313 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: Memory bandwidth is the maximum amount of data (in units of MB per second) that can be moved over the external memory interface in a second. The number is worked out by multiplying the card's interface width by the speed of its memory. If it uses DDR type memory, it must be multiplied by 2 once again. If DDR5, multiply by 4 instead. The higher the memory bandwidth, 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 number of texture map elements (texels) that can be processed in one second. This number is worked out by multiplying the total amount of texture units by the core speed of the chip. The higher this number, the better the video card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels processed in a second.

Pixel Rate: Pixel rate is the maximum amount of pixels the video card could possibly write to the local memory per second - measured in millions of pixels per second. Pixel rate is calculated by multiplying the amount of Render Output Units by the the card's clock speed. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for outputting the pixels (image) to the screen. 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 potential to reach the maximum fill rate.

Display Prices

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Radeon R9 280

Amazon.com

Check prices at:

Radeon R9 280X

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.

Comments

One Response to “Radeon R9 280 vs Radeon R9 280X”
Panu says:

280x has 1GHz core, not 850MHz

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