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Gaming Performance Comparison

Recommended System Requirements
Game Radeon R9 M390 4GB Radeon R9 M295X 4GB

In terms of overall gaming performance, the graphical capabilities of the AMD Radeon R9 M295X 4GB are noticeably better than the AMD Radeon R9 M390 4GB.

The R9 M390 and the R9 M295X have the same core clock speed of 850 MHz, but the R9 M295X has 48 more Texture Mapping Units than the R9 M390. As a result, the R9 M295X exhibits a 40.8 GTexel/s better Texture Fill Rate than the R9 M390. This still holds weight but shader performance is generally more relevant, particularly since both of these GPUs support at least DirectX 10.

The R9 M390 and the R9 M295X have both the same core clock speed and the same Pixel Fill Rate. However, both GPUs support DirectX 9 or above, and pixeling performance is only really relevant when comparing older cards.

The R9 M390 was released less than a year after the R9 M295X, and so they are likely to have similar driver support for optimizing performance when running the latest games.

The Radeon R9 M390 4GB and the Radeon R9 M295X 4GB have the same amount of video memory, but are likely to provide slightly different experiences when displaying game textures at high resolutions.

The R9 M295X has 20.7 GB/sec greater memory bandwidth than the R9 M390, which means that the memory performance of the R9 M295X is slightly better than the R9 M390.

The Radeon R9 M390 4GB has 1280 Shader Processing Units and the Radeon R9 M295X 4GB has 2048. However, the actual shader performance of the R9 M390 is 979 and the actual shader performance of the R9 M295X is 1132. The R9 M295X having 153 better shader performance and an altogether better performance when taking into account other relevant data means that the R9 M295X delivers a significantly smoother and more efficient experience when processing graphical data than the R9 M390.

The Radeon R9 M390 4GB requires 100 Watts to run and the Radeon R9 M295X 4GB requires 125 Watts. The R9 M295X requires 25 Watts more than the R9 M390 to run. The difference is not significant enough for the R9 M295X to have a noticeably larger impact on your yearly electricity bills than the R9 M390.

Can I Run It

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GPU Architecture

Core Speed850 MHzvs850 MHz
Boost Clock900 MHzvs-
ArchitectureGCN 1.1 Neptune XTTonga
OC Potential Fair vs Fair
Driver Support Great vs -
Release Date09 Jun 2015vs23 Nov 2014
GPU LinkGD LinkGD Link

Resolution Performance

green tick vs green tick
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GPU Memory

Memory4096 MBvs4096 MB
Memory Speed1200 MHzvs1362 MHz
Memory Bus256 Bitvs256 Bit
Memory TypeGDDR5vsGDDR5
Memory Bandwidth153.6GB/secvs174.3GB/sec
L2 Cache 512 KB green tick vs 0 KB
Delta Color Compression no vs no
Memory Performance 0% green tick vs green tick 0%

GPU Display

Shader Processing Units1280vs2048
Actual Shader Performance47%vs54%
Texture Mapping Units80vs128
Texture Rate68 GTexel/svs108.8 GTexel/s
Render Output Units32vs32
Pixel Rate27.2 GPixel/svs27.2 GPixel/s

GPU Outputs

Max Digital Resolution (WxH)4096x2160vs4096x2160
VGA Connections0vs0
DVI Connections0vs0
HDMI Connections0vs0
DisplayPort Connections0vs-

GPU Power Requirements

Max Power100 Wattsvs125 Watts
Recommended PSU--

GPU Features

Shader Model5.0vs5.0
Open GL4.4vs4.4
Open CL-vs-
Notebook GPUyesyes

GPU Supporting Hardware

Recommended ProcessorIntel Core i7-4810MQ 4-Core 2.8GHzvsIntel Core i7-4930MX 4-Core 3.0GHz
Recommended RAM8 GBvs8 GB
Maximum Recommended Gaming Resolution1920x1080vs1920x1080

Gaming Performance Value

Performance Value

GPU Mini Review

Mini ReviewOverview
Radeon R9 M390 4GB is a High-End Mobile Graphics Card based on the Second Generation of the Graphics Core Next Architecture (GCN).

Radeon R9 M390 4GB Features a GPU Codenamed Neptune XT which is a Second Gen GCN GPU and is identical to the Curacao XT GPU used on the Desktop Radeon R9 270X.
Neptune XT has 20 Compute Units Unlocked and thus offers 1280 Shader Processing Units, 80 TMUs and 32 ROPs.

The Central Unit is Clocked at 850MHz and goes up to 900MHz, in Turbo Mode.

Memory: Speed
The GPU is equipped with fast GDDR5 and Accesses the Frame Buffer through a 256-bit Memory Interface. The Memory Clock Operates at 1200MHz.

Memory: Frame Buffer
The GPU can fill up a Memory Pool of up to 4GB. Under most circumstances, this only proves useful in certain 3D Games whose Settings Require Large Amounts of Memory.
However, because the GPU itself is too weak to work under other circumstances in which 4GB of Memory are needed - such as 4K Gaming, a Large Frame Buffer is mostly a Gimmick.

Power Consumption
With a rated board TDP of 100W, it is suited for very large laptops.

Radeon R9 M390X 4GB is a Direct Rebrand of Radeon R9 M290X 4GB.
Performance is Comparable to the desktop Radeon R9 270.

System Suggestions
Radeon R9 M390 4GB is best suited for resolutions up to and including 1920x1080. We recommend a Strong Processor and 8GB of RAM for Optimal Performance.
Radeon R9 M295X 4GB is an upcoming high-end mobile Graphics Card, based on the second revision of the GCN architecture.
It offers a GPU codenamed "Tonga" which is at essence an upgraded Tahiti XTX GPU (used on Radeon HD 7970 GE) and features 2048 Shader Processing Units, 128 TMUs and 32 ROPs, on a 256-bit memory interface of fast GDDR5.
The clock frequencies are not known yet.
Expect a rated board TDP that should clearly surpass the 100W barrier and performance around the levels of a Radeon HD 7950.
There are no benchmarks yet but we predict Radeon R9 M295X 4GB has potential to be slightly faster than the world's most powerful mobile Graphics Card as of June 2014 - GeForce GTX 880M.
Recommended CPUIntel Core i5-6200U 2.3GHz
Intel Core i7-820QM 4-Core 1.73GHz
Intel Core i3-6167U 2.7GHz
Intel Core i3-6100H 2.7GHz
Intel Core i5-5350U 1.8GHz
Intel Core i7-4930MX 4-Core 3.0GHz
Intel Core i7-5950HQ 4-Core 2.9GHz
Intel Core i7-4980HQ 4-Core 2.8GHz
Possible GPU UpgradesN/AN/A
GPU Variants--