Radeon R7 M340 vs Radeon R9 M385X

When choosing between Radeon R7 M340 and Radeon R9 M385X, it is worth examining the specifications of the models in detail. Do they meet the recommended requirements of modern games and software? Storage capacity, form factor, TDP, available ports, warranty and manufacturer support are all important. For example, the size of a PC case can limit the maximum thickness and length of the card. Often, instead of the factory overclocked card and RGB backlight, it is better to choose a reference model with a more efficient GPU. And make sure that your current power supply unit has the correct connection pins (using adapters is not recommended). This GPUs compare tool is meant to help you to choose the best graphics card for your build. Let's find out the difference between Radeon R7 M340 and Radeon R9 M385X.

Radeon R7 M340 and Radeon R9 M385X are Laptop Graphics Cards

Note: Radeon R7 M340 and Radeon R9 M385X are only used in laptop graphics. They have lower GPU clock speed compared to the desktop variant, which results in lower power consumption, but also 10-30% lower gaming performance. Check available laptop models with Radeon R7 M340 or Radeon R9 M385X here:

Main Specs

  Radeon R7 M340 Radeon R9 M385X
Interface PCIe 3.0 x8 PCIe 3.0 x16
Supplementary power connectors None
Memory type DDR3 GDDR5
Maximum RAM amount 4 GB 4 GB
Display Connectors No outputs No outputs
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  • Radeon R7 M340 is connected by PCIe 3.0 x8, and Radeon R9 M385X uses PCIe 3.0 x16 interface.
  • Radeon R7 M340 and Radeon R9 M385X have maximum RAM of 4 GB.
  • Both cards are used in Laptops.
  • Radeon R7 M340 and Radeon R9 M385X are build with GCN architecture.
  • Core clock speed of Radeon R9 M385X is 79 MHz higher, than Radeon R7 M340.
  • Radeon R7 M340 and Radeon R9 M385X are manufactured by 28 nm process technology.
  • Memory clock speed of Radeon R9 M385X is 500 MHz higher, than Radeon R7 M340.

Game benchmarks

high / 1080p 0−1 8−9
ultra / 1080p 5−6
QHD / 1440p 0−1 0−1
low / 720p 1−2 18−20
medium / 1080p 0−1 10−11
The average gaming FPS of Radeon R9 M385X in Assassin's Creed Odyssey is 1800% more, than Radeon R7 M340.

Full Specs

  Radeon R7 M340 Radeon R9 M385X
Architecture GCN GCN
Code name Meso Pro DDR3 Strato-XT-M3
Type Laptop Laptop
Release date 16 June 2015 16 June 2015
Pipelines 320 896
Core clock speed 1021 MHz 1100 MHz
Boost Clock 1021 MHz 1100 MHz
Transistor count 950 million 2,080 million
Manufacturing process technology 28 nm 28 nm
Texture fill rate 17.16 61.60
Floating-point performance 549.1 gflops 1,971 gflops
Memory bus width 128 Bit 128 Bit
Memory clock speed 1000 MHz 1500 MHz
Memory bandwidth 16 GB/s 76.8 GB/s
Shared memory - -
Shader Model 5.1 6.3
OpenGL 4.4 4.4
OpenCL Not Listed Not Listed
Vulkan +
FreeSync + +
Bus support PCIe 3.0 PCIe 3.0
Bitcoin / BTC (SHA256) 74 Mh/s
Laptop size large
Eyefinity + +
HD3D + +
PowerTune + +
DualGraphics + +
ZeroCore + +
Switchable graphics + +
Mantle + +
Compute units 6
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