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Radeon R9 270X vs Radeon R9 380X

Intro

The Radeon R9 270X has a core clock frequency of 1000 MHz and a GDDR5 memory frequency of 1400 MHz. It also makes use of a 256-bit bus, and makes use of a 28 nm design. It is comprised of 1280 SPUs, 80 TAUs, and 32 ROPs.

Compare those specifications to the Radeon R9 380X, which features GPU clock speed of 970 MHz, and 4096 MB of GDDR5 RAM running at 1425 MHz through a 256-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 380X 9519 points
Radeon R9 270X 6590 points
Difference: 2929 (44%)

Ethereum Mining Hash Rate

Radeon R9 380X 19 Mh/s
Radeon R9 270X 18 Mh/s
Difference: 1 (6%)

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon R9 270X 180 Watts
Radeon R9 380X 190 Watts
Difference: 10 Watts (6%)

Memory Bandwidth

In theory, the Radeon R9 380X should be a small bit faster than the Radeon R9 270X overall. (explain)

Radeon R9 380X 182400 MB/sec
Radeon R9 270X 179200 MB/sec
Difference: 3200 (2%)

Texel Rate

The Radeon R9 380X will be a lot (about 55%) faster with regards to anisotropic filtering than the Radeon R9 270X. (explain)

Radeon R9 380X 124160 Mtexels/sec
Radeon R9 270X 80000 Mtexels/sec
Difference: 44160 (55%)

Pixel Rate

If using a high resolution is important to you, then the Radeon R9 270X is the winner, but only just. (explain)

Radeon R9 270X 32000 Mpixels/sec
Radeon R9 380X 31040 Mpixels/sec
Difference: 960 (3%)

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 380X

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 380X
Manufacturer AMD AMD
Year October 2013 November 2015
Code Name Curacao XT Tonga XT
Memory 2048 MB 4096 MB
Core Speed 1000 MHz 970 MHz
Memory Speed 5600 MHz 5700 MHz
Power (Max TDP) 180 watts 190 watts
Bandwidth 179200 MB/sec 182400 MB/sec
Texel Rate 80000 Mtexels/sec 124160 Mtexels/sec
Pixel Rate 32000 Mpixels/sec 31040 Mpixels/sec
Unified Shaders 1280 2048
Texture Mapping Units 80 128
Render Output Units 32 32
Bus Type GDDR5 GDDR5
Bus Width 256-bit 256-bit
Fab Process 28 nm 28 nm
Transistors 2800 million 5000 million
Bus PCIe 3.0 x16 PCIe 3.0 x16
DirectX Version DirectX 11.2 DirectX 12.0
OpenGL Version OpenGL 4.3 OpenGL 4.5

Memory Bandwidth: Bandwidth is the largest amount of information (in units of megabytes per second) that can be transported over the external memory interface in one second. It is calculated by multiplying the interface width by its memory speed. In the case of DDR type RAM, it must be multiplied by 2 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 AA, High Dynamic Range and high resolutions.

Texel Rate: Texel rate is the maximum amount of texture map elements (texels) that can be applied in one second. This is worked out by multiplying the total amount 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 processed in one second.

Pixel Rate: Pixel rate is the most pixels that the graphics chip can possibly write to its local memory per second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the amount of ROPs by the clock speed of the card. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel output rate is also dependant on quite a few other factors, especially the memory bandwidth - the lower the memory bandwidth is, the lower the potential to reach the maximum fill rate.

Display Prices

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Radeon R9 270X

Amazon.com

Check prices at:

Radeon R9 380X

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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