Mobility Radeon HD 3870 X2 vs Radeon R9 M365X

In this comparison between Mobility Radeon HD 3870 X2 and Radeon R9 M365X you will find out which graphics card performs better in today's games. Bear in mind that third-party versions may have more efficient cooling and higher clock speeds. This will increase cards' performance, though not by much. In addition to raw power you should also take into account the dimensions. Thicker models simply will not fit into a small mini-ITX case. The resolution of your monitor also affects the choice, since 4K gameplay requires a more powerful GPU. And don't overspend on the graphics card. Other parts of your build may also need to be upgraded, save some money for the CPU or power supply. For some people Mobility Radeon HD 3870 X2 will be the best choice, for others Radeon R9 M365X will be their preference. Study the comparison tables below and make your choice.

Mobility Radeon HD 3870 X2 and Radeon R9 M365X are Laptop Graphics Cards

Note: Mobility Radeon HD 3870 X2 and Radeon R9 M365X 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 Mobility Radeon HD 3870 X2 or Radeon R9 M365X here:

Main Specs

  Mobility Radeon HD 3870 X2 Radeon R9 M365X
Power consumption (TDP) 110 Watt
Interface PCIe 2.0 x16 PCIe 3.0 x16
Memory type GDDR3 GDDR5
Maximum RAM amount 512 MB 4 GB
Display Connectors No outputs No outputs
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  • Mobility Radeon HD 3870 X2 is connected by PCIe 2.0 x16, and Radeon R9 M365X uses PCIe 3.0 x16 interface.
  • Mobility Radeon HD 3870 X2 has 508 GB more memory, than Radeon R9 M365X.
  • Both cards are used in Laptops.
  • Mobility Radeon HD 3870 X2 is build with RV6xx architecture, and Radeon R9 M365X - with GCN.
  • Core clock speed of Radeon R9 M365X is 240 MHz higher, than Mobility Radeon HD 3870 X2.
  • Mobility Radeon HD 3870 X2 is manufactured by 55 nm process technology, and Radeon R9 M365X - by 28 nm process technology.
  • Memory clock speed of Radeon R9 M365X is 275 MHz higher, than Mobility Radeon HD 3870 X2.

Game benchmarks

high / 1080p 6−7 6−7
ultra / 1080p 4−5 4−5
QHD / 1440p 0−1 0−1
low / 720p 16−18 16−18
medium / 1080p 8−9 8−9
Mobility Radeon HD 3870 X2 and Radeon R9 M365X have the same average FPS in Assassin's Creed Odyssey.

Full Specs

  Mobility Radeon HD 3870 X2 Radeon R9 M365X
Architecture RV6xx GCN
Code name M88-XT CF Tropo
Type Laptop Laptop
Release date 1 September 2008 6 May 2015
Pipelines 640 640
Core clock speed 660 MHz 900 MHz
Boost Clock 925 MHz
Transistor count 666 million 1,500 million
Manufacturing process technology 55 nm 28 nm
Texture fill rate 10.56 37.00
Floating-point performance 2x 422.4 gflops 1,184 gflops
Memory bus width 256 Bit 128 Bit
Memory clock speed 850 MHz 1125 MHz
Memory bandwidth 54.4 GB/s 72 GB/s
Shared memory - -
DirectX 10.1 (10_1)
Shader Model 4.1 5.1
OpenGL 3.3 4.4
OpenCL N/A Not Listed
Vulkan N/A
FreeSync +
Bus support PCIe 3.0
Laptop size large medium sized
Eyefinity +
HD3D +
PowerTune +
DualGraphics +
ZeroCore +
Switchable graphics +
Mantle +
Compute units 10
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