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Radeon HD 7970 vs Radeon R9 M380

Intro

The Radeon HD 7970 features a clock frequency of 925 MHz and a GDDR5 memory frequency of 1375 MHz. It also makes use of a 384-bit memory bus, and makes use of a 28 nm design. It is comprised of 2048 SPUs, 128 TAUs, and 32 Raster Operation Units.

Compare that to the Radeon R9 M380, which features clock speeds of 1000 MHz on the GPU, and 1500 MHz on the 4096 MB of GDDR5 RAM. It features 640 SPUs along with 40 Texture Address Units and 16 Rasterization Operator Units.

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Power Usage and Theoretical Benchmarks

Memory Bandwidth

As far as performance goes, the Radeon HD 7970 should theoretically be a lot better than the Radeon R9 M380 in general. (explain)

Radeon HD 7970 264000 MB/sec
Radeon R9 M380 96000 MB/sec
Difference: 168000 (175%)

Texel Rate

The Radeon HD 7970 is much (more or less 196%) better at AF than the Radeon R9 M380. (explain)

Radeon HD 7970 118400 Mtexels/sec
Radeon R9 M380 40000 Mtexels/sec
Difference: 78400 (196%)

Pixel Rate

If running with a high resolution is important to you, then the Radeon HD 7970 is a better choice, and very much so. (explain)

Radeon HD 7970 29600 Mpixels/sec
Radeon R9 M380 16000 Mpixels/sec
Difference: 13600 (85%)

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 HD 7970

Amazon.com

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Radeon R9 M380

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 HD 7970 Radeon R9 M380
Manufacturer AMD AMD
Year January 2012 2015
Code Name Tahiti XT Cape Verde
Memory 3072 MB 4096 MB
Core Speed 925 MHz 1000 MHz
Memory Speed 5500 MHz 6000 MHz
Power (Max TDP) 250 watts (Unknown) watts
Bandwidth 264000 MB/sec 96000 MB/sec
Texel Rate 118400 Mtexels/sec 40000 Mtexels/sec
Pixel Rate 29600 Mpixels/sec 16000 Mpixels/sec
Unified Shaders 2048 640
Texture Mapping Units 128 40
Render Output Units 32 16
Bus Type GDDR5 GDDR5
Bus Width 384-bit 128-bit
Fab Process 28 nm 28 nm
Transistors 4313 million (Unknown) million
Bus PCIe 3.0 x16 PCIe 3.0 x16
DirectX Version DirectX 11.1 DirectX 12
OpenGL Version OpenGL 4.2 OpenGL 4.3

Memory Bandwidth: Memory bandwidth is the maximum amount of data (in units of MB per second) that can be transferred across the external memory interface in a second. It is calculated by multiplying the bus width by the speed of its memory. In the case of DDR RAM, it should be multiplied by 2 again. If it uses DDR5, multiply by ANOTHER 2x. The higher the memory bandwidth, 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 number of texture map elements (texels) that are applied per second. This is worked out by multiplying the total texture units of the card by the core clock 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 in one second.

Pixel Rate: Pixel rate is the maximum number of pixels that the graphics card can possibly record to the local memory in a second - measured in millions of pixels per second. Pixel rate is calculated by multiplying the amount of ROPs by the the core speed of the card. ROPs (Raster Operations Pipelines - sometimes also referred to as Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel output rate also depends on lots of other factors, especially the memory bandwidth of the card - the lower the bandwidth is, the lower the potential to get to the maximum fill rate.

Display Prices

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Radeon HD 7970

Amazon.com

Check prices at:

Radeon R9 M380

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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