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Radeon R9 270X vs Radeon R9 280X

Intro

The Radeon R9 270X makes use of a 28 nm design. AMD has clocked the core speed at 1000 MHz. The GDDR5 memory is set to run at a speed of 1400 MHz on this particular model. It features 1280 SPUs as well as 80 Texture Address Units and 32 ROPs.

Compare those specs to the Radeon R9 280X, which has GPU clock speed of 850 MHz, and 3072 MB of GDDR5 memory running at 1500 MHz through a 384-bit bus. It also is made up of 2048 Stream Processors, 128 TAUs, and 32 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 280X 8886 points
Radeon R9 270X 6590 points
Difference: 2296 (35%)

Zcash Mining Hash Rate

Radeon R9 280X 294 Sol/s
Radeon R9 270X 177 Sol/s
Difference: 117 (66%)

Ethereum Mining Hash Rate

Radeon R9 280X 21 Mh/s
Radeon R9 270X 18 Mh/s
Difference: 3 (17%)

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon R9 270X 180 Watts
Radeon R9 280X 250 Watts
Difference: 70 Watts (39%)

Memory Bandwidth

Theoretically speaking, the Radeon R9 280X will be 61% faster than the Radeon R9 270X overall, due to its higher data rate. (explain)

Radeon R9 280X 288000 MB/sec
Radeon R9 270X 179200 MB/sec
Difference: 108800 (61%)

Texel Rate

The Radeon R9 280X will be quite a bit (more or less 36%) better at anisotropic filtering than the Radeon R9 270X. (explain)

Radeon R9 280X 108800 Mtexels/sec
Radeon R9 270X 80000 Mtexels/sec
Difference: 28800 (36%)

Pixel Rate

The Radeon R9 270X will be a little bit (approximately 18%) better at AA than the Radeon R9 280X, and also able to handle higher resolutions without losing too much performance. (explain)

Radeon R9 270X 32000 Mpixels/sec
Radeon R9 280X 27200 Mpixels/sec
Difference: 4800 (18%)

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 270X

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 270X Radeon R9 280X
Manufacturer AMD AMD
Year October 2013 October 2013
Code Name Curacao XT Tahiti XTL
Memory 2048 MB 3072 MB
Core Speed 1000 MHz 850 MHz
Memory Speed 5600 MHz 6000 MHz
Power (Max TDP) 180 watts 250 watts
Bandwidth 179200 MB/sec 288000 MB/sec
Texel Rate 80000 Mtexels/sec 108800 Mtexels/sec
Pixel Rate 32000 Mpixels/sec 27200 Mpixels/sec
Unified Shaders 1280 2048
Texture Mapping Units 80 128
Render Output Units 32 32
Bus Type GDDR5 GDDR5
Bus Width 256-bit 384-bit
Fab Process 28 nm 28 nm
Transistors 2800 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: Bandwidth is the max amount of data (in units of MB per second) that can be moved over the external memory interface in a second. It is worked out by multiplying the bus width by its memory clock speed. If it uses DDR RAM, it must be multiplied by 2 again. If DDR5, multiply by 4 instead. The higher the 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 can be processed in one second. This is calculated by multiplying the total texture units of the card by the core speed of the chip. The better this number, the better the card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels in one second.

Pixel Rate: Pixel rate is the most pixels the graphics card could possibly write to the local memory in a second - measured in millions of pixels per second. Pixel rate is calculated by multiplying the number of ROPs by the the core clock speed. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel rate is also dependant on many 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 270X

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

7 Responses to “Radeon R9 270X vs Radeon R9 280X”
Duu says:

Hello, i have a question.
appears in yours table that the memory bandwidth is measured by MB/s, however I see in another website that measured memory bandwidth as GB/s , wich one is correct ?
Thanks, and sorry for my bad english 😛

nima says:

mb/s should be more accurate

SAM says:

their both correct 1 gb equals 1024 mb, so the Memory Bandwidth of amd r9 280x which is 179200 mb would be around 175gb/sec

vahid_dez says:

hi i have 530 watt power suply.
it's enoght for r9 280x ???

Robin says:

@vahid_dez. yes it will.

rob says:

i am just wondering if upgrading from the R9270 2 gb to the R280X 3g will help me with locked $g video i experience from time to time it will be 100.00 differece in price thx rob

rob says:

locked in 4k video

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