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Radeon R9 M390X vs Radeon R9 M395X
Intro
The Radeon R9 M390X uses a 28 nm design. AMD has set the core frequency at 723 MHz. The GDDR5 RAM works at a frequency of 1250 MHz on this specific model. It features 2048 SPUs along with 128 Texture Address Units and 32 ROPs.Compare that to the Radeon R9 M395X, which makes use of a 28 nm design. AMD has clocked the core frequency at 723 MHz. The GDDR5 memory is set to run at a frequency of 1250 MHz on this particular card. It features 2048 SPUs along with 128 TAUs and 32 Rasterization Operator Units.
Power Usage and Theoretical Benchmarks
Both cards have the same power consumption.Memory Bandwidth
Both cards have exactly the same bandwidth, so in theory they should perform exactly the same. (explain)
Texel Rate
Both cards have the exact same texel fill rate, so theoretically they should perform equally good at at anisotropic filtering. (explain)Pixel Rate
Both cards have exactly the same pixel rate, so theoretically they should be equally good at at anti-aliasing, and be able to handle the same screen resolutions. (explain)
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
Radeon R9 M390XAmazon.com
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Radeon R9 M395XAmazon.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
| Model | Radeon R9 M390X | Radeon R9 M395X |
|---|---|---|
| Manufacturer | AMD | AMD |
| Year | 2015 | 2015 |
| Code Name | Tonga | Tonga |
| Memory | 4096 MB | 4096 MB |
| Core Speed | 723 MHz | 723 MHz |
| Memory Speed | 5000 MHz | 5000 MHz |
| Power (Max TDP) | 125 watts | 125 watts |
| Bandwidth | 160000 MB/sec | 160000 MB/sec |
| Texel Rate | 92544 Mtexels/sec | 92544 Mtexels/sec |
| Pixel Rate | 23136 Mpixels/sec | 23136 Mpixels/sec |
| Unified Shaders | 2048 | 2048 |
| Texture Mapping Units | 128 | 128 |
| Render Output Units | 32 | 32 |
| Bus Type | GDDR5 | GDDR5 |
| Bus Width | 256-bit | 256-bit |
| Fab Process | 28 nm | 28 nm |
| Transistors | (Unknown) million | (Unknown) million |
| Bus | PCIe 3.0 x16 | PCIe 3.0 x16 |
| DirectX Version | DirectX 12 | DirectX 12 |
| OpenGL Version | OpenGL 4.3 | OpenGL 4.3 |
Memory Bandwidth: Memory bandwidth is the largest amount of information (measured in megabytes per second) that can be transported past the external memory interface within a second. It is calculated by multiplying the card's bus width by the speed of its memory. In the case of DDR memory, it should be multiplied by 2 again. If DDR5, multiply by 4 instead. The better the bandwidth is, the better the card will be in general. It especially helps with AA, HDR and high resolutions.
Texel Rate: Texel rate is the maximum texture map elements (texels) that are processed in one second. This is calculated by multiplying the total amount of texture units by the core speed of the chip. The better the texel rate, the better the graphics card will be at handling 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 the graphics card could possibly record to the local memory in a second - measured in millions of pixels per second. The figure is worked out by multiplying the number of Raster Operations Pipelines by the the core clock speed. 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 rate is also dependant on lots of other factors, especially the memory bandwidth of the card - the lower the bandwidth is, the lower the ability to get to the max fill rate.
Radeon R9 M390XAmazon.com
Check prices at:
|
Radeon R9 M395XAmazon.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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