AMD Radeon R9 M390 vs AMD Radeon R9 M390X vs AMD Radeon R9 M380
AMD Radeon R9 M390
► remove from comparisonThe AMD Radeon R9 M390 is a mobile graphics card from 2015 and positioned as a fast mid-range GPU. It should be based on the the old Pitcairn chip (e.g. in 2012 used in the desktop 7870 graphics card) and offers 1024 shader cores clocked at 958 MHz. Furthermore, 2 GB GDDR5 dedicated graphics memory are connected via a 256 Bit memory bus. The graphics card is used in the Apple iMac 27-inch late 2015 (mid range model).
The performance of the Radeon R9 M390 slightly above a Nvidia GeForce GTX 960M or 870M but still beyond a desktop Radeon R7 370. Therefore, demanding games of 2015 may only run in medium settings at up to full HD resolutions fluently. The native 5K resolution of the iMac or even the perfectly scaled 2560x1600 will be definitely too much.
AMD Radeon R9 M390X
► remove from comparisonThe AMD Radeon R9 M390X is a mobile high-end graphics card for laptops. It is most likely based on the same chip as the AMD Radeon R9 M295X in the iMac 5K Late 2014. That means it should be based on the third generation of GCN (desktop Tonga chip). The amount of shader cores is identical but the core clock is reduced by 15% (from 850 MHz to 723 MHz) and the memory is also clocked slower (5448 MHz vs 5000 MHz).
The performance should be a bit below the M295X. Compared to the competition, the R9-M390X should be positioned somewhere between the GeForce GTX 965M and 970M and therefore suitable for high-end games in 1080p resolution and high detail settings.
The card was first mentioned by Alienware on their twitter account and should feature 4GB VRAM according to the tweet.
The power consumption should be rated around 100 Watt TDP and therefore suited only for large and bulky laptops (like the Alienware M17x it was announced in).
AMD Radeon R9 M380
► remove from comparisonThe AMD Radeon R9 M380 is a dedicated mid-range graphics card for laptops. It is based on a 28nm GCN core with 12 compute units and a GDDR5 memory controller. Despite the similar name, the Radeon R7 M380 is a much slower as it features only 10 compute units and DDR3 memory.
Features
Features of the R9-M380 include video decoding for MPEG-4 AVC/H.264, VC-1, MPEG-2, and Flash directly by the AMD GPU. Multi-View Codec (MVC) and MPEG-4 part 2 (DivX, xVid) HD videos are compatible as well.
The R9 series also supports automatic graphics switching between the integrated GPU and discrete GPU. Called Enduro, the technology supersedes AMD's Dynamic Switchable Graphics and is similar to Nvidia's Optimus. Furthermore, the M380 can directly support multiple monitors using Eyefinity Technology if Enduro is disabled.
Other features include ZeroCore to reduce the power consumption when the display is turned off and Power Gating to power down areas of the chip that are not used.
The integrated HD audio processor is able to transmit HD Audio (TrueHD or DTS Master Audio) over HDMI and DisplayPort (e.g., for Blu-Ray videos). Additionally, it allows audio output simultaneously and in parallel to multiple devices with the new Discrete Digital Multipoint Audio (DDMA) feature.
AMD Radeon R9 M390 | AMD Radeon R9 M390X | AMD Radeon R9 M380 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Radeon R9 M300 Series |
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Codename | Pitcairn | Amethyst (XT) / Tonga | Strato Pro GDDR5 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Architecture | GCN | GCN 3 | GCN | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Pipelines | 1024 - unified | 2048 - unified | 768 - unified | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Core Speed | 958 (Boost) MHz | 723 (Boost) MHz | 1000 MHz | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Memory Speed | 5460 MHz | 5000 MHz | 6000 MHz | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Memory Bus Width | 256 Bit | 256 Bit | 128 Bit | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Memory Type | GDDR5 | GDDR5 | GDDR5 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Max. Amount of Memory | 2048 MB | 4 GB | 4 GB | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Shared Memory | no | no | no | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
API | DirectX 12 (FL 11_2), Shader 5.0 | DirectX 12 (FL 12_0), Shader 5.0, OpenGL 4.3 / Vulkan | DirectX 11.1, Shader 5.0, OpenGL 4.3 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Transistors | 5 Billion | 5 Billion | 1.5 Billion | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
technology | 28 nm | 28 nm | 28 nm | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Features | DirectX 12, OpenCL, DirectCompute 5.0 | DirectX 12, OpenCL 1.2, OpenGL 4.3, Vulkan, Mantle | DirectCompute 5.0, OpenCL | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Notebook Size | large | large | medium sized | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Date of Announcement | 09.06.2015 | 09.06.2015 | 16.06.2015 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Power Consumption | 125 Watt |