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Radeon R9 M390X vs Radeon R9 M395X
Intro
The Radeon R9 M390X comes with a clock frequency of 723 MHz and a GDDR5 memory frequency of 1250 MHz. It also features a 256-bit bus, and makes use of a 28 nm design. It features 2048 SPUs, 128 Texture Address Units, and 32 ROPs.Compare all of that to the Radeon R9 M395X, which comes with GPU clock speed of 723 MHz, and 4096 MB of GDDR5 RAM set to run at 1250 MHz through a 256-bit bus. It also is comprised of 2048 Stream Processors, 128 Texture Address Units, and 32 Raster Operation Units.
Power Usage and Theoretical Benchmarks
Both cards have the same power consumption.Memory Bandwidth
Both cards have the exact same memory bandwidth, so theoretically they should perform exactly the same. (explain)
Texel Rate
Both cards have exactly the same texel fill rate, so in theory they should be equally good at at anisotropic filtering. (explain)Pixel Rate
Both cards have the exact same pixel rate, so in theory they should be equally good at at AA, 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: Bandwidth is the max amount of data (measured in MB per second) that can be transported across the external memory interface in a second. It is worked out by multiplying the card's interface width by its memory speed. If the card has DDR memory, it must be multiplied by 2 again. If it uses DDR5, multiply by ANOTHER 2x. The better the memory bandwidth, the faster the card will be in general. It especially helps with anti-aliasing, High Dynamic Range and high resolutions.
Texel Rate: Texel rate is the maximum texture map elements (texels) that are applied in one second. This is calculated by multiplying the total texture units by the core clock speed of the chip. The better this number, the better the video 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 that the graphics chip could possibly write to the local memory in one second - measured in millions of pixels per second. Pixel rate is calculated by multiplying the number of ROPs by the the card's clock speed. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel output rate also depends on lots of other factors, especially the memory bandwidth of the card - the lower the memory 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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