Radeon HD 8770M vs Radeon R9 M385X

When comparing Radeon HD 8770M and Radeon R9 M385X, we look primarily at benchmarks and game tests. But it is not only about the numbers. Often you can find third-party models with higher clock speeds, better cooling, or a customizable RGB lighting. Not all of them will have all the features you need. Another thing to consider is the port selection. Most graphics cards have at least one DisplayPort and HDMI interface, but some monitors require DVI. Before you buy, check the TDP of the graphics card - this characteristic will help you estimate the consumption of the graphics card. You may even have to upgrade your PSU to meet its requirements. An important factor when choosing between Radeon HD 8770M and Radeon R9 M385X is the price. Does the additional cost justify the performance hit? Our comparison should help you make the right decision.

Radeon HD 8770M and Radeon R9 M385X are Laptop Graphics Cards

Note: Radeon HD 8770M 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 HD 8770M or Radeon R9 M385X here:

Main Specs

  Radeon HD 8770M Radeon R9 M385X
Interface PCIe 3.0 x8 PCIe 3.0 x16
Memory type GDDR5 GDDR5
Maximum RAM amount 2 GB 4 GB
Display Connectors No outputs No outputs
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  • Radeon HD 8770M is connected by PCIe 3.0 x8, and Radeon R9 M385X uses PCIe 3.0 x16 interface.
  • Radeon R9 M385X has 2 GB more memory, than Radeon HD 8770M.
  • Both cards are used in Laptops.
  • Radeon HD 8770M and Radeon R9 M385X are build with GCN architecture.
  • Core clock speed of Radeon R9 M385X is 325 MHz higher, than Radeon HD 8770M.
  • Radeon HD 8770M and Radeon R9 M385X are manufactured by 28 nm process technology.
  • Memory clock speed of Radeon HD 8770M is 3000 MHz higher, than Radeon R9 M385X.

Game benchmarks

high / 1080p 7−8 8−9
ultra / 1080p 4−5 5−6
QHD / 1440p 0−1 0−1
low / 720p 16−18 18−20
medium / 1080p 8−9 10−11
The average gaming FPS of Radeon R9 M385X in Assassin's Creed Odyssey is 11% more, than Radeon HD 8770M.

Full Specs

  Radeon HD 8770M Radeon R9 M385X
Architecture GCN GCN
Code name Mars Strato-XT-M3
Type Laptop Laptop
Release date 16 November 2012 16 June 2015
Pipelines 384 896
Core clock speed 775 MHz 1100 MHz
Boost Clock 825 MHz 1100 MHz
Transistor count 950 million 2,080 million
Manufacturing process technology 28 nm 28 nm
Texture fill rate 19.80 61.60
Floating-point performance 633.6 gflops 1,971 gflops
Memory bus width 128 Bit 128 Bit
Memory clock speed 4500 MHz 1500 MHz
Memory bandwidth 72 GB/s 76.8 GB/s
Shared memory - -
DirectX 12 (11_1)
Shader Model 5.1 6.3
OpenGL 4.6 4.4
OpenCL 1.2 Not Listed
Vulkan 1.2.131
FreeSync +
Bus support PCIe 3.0
Laptop size medium sized large
Eyefinity +
HD3D +
PowerTune +
DualGraphics +
ZeroCore +
Switchable graphics +
Mantle +
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