Radeon HD 7870 vs Radeon R9 M390

Find out if it is worth upgrading your current GPU setup by comparing Radeon HD 7870 and Radeon R9 M390. Here you can take a closer look at graphics cards specs, such as core clock speed, memory type and size, display connectors, etc. The price, overall benchmark and gaming performances are usually defining factors when it comes to choosing between Radeon HD 7870 and Radeon R9 M390. Make sure that the graphics card has compatible dimensions and will properly fit in your new or current computer case. Also these graphics cards may have different system power recommendations, so take that into consideration and upgrade your PSU if necessary.

Radeon R9 M390 is a Laptop Graphics Card

Note: Radeon R9 M390 is only used in laptop graphics. It has 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 R9 M390 here:

Main Specs

  Radeon HD 7870 Radeon R9 M390
Power consumption (TDP) 175 Watt
Memory type GDDR5 GDDR5
Maximum RAM amount 2 GB 2 GB
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  • Radeon HD 7870 and Radeon R9 M390 have maximum RAM of 2 GB.
  • Radeon HD 7870 is used in Desktops, and Radeon R9 M390 - in Laptops.
  • Radeon HD 7870 and Radeon R9 M390 are build with GCN architecture.
  • Radeon HD 7870 and Radeon R9 M390 are manufactured by 28 nm process technology.

Game benchmarks

high / 1080p 24−27 18−20
ultra / 1080p 14−16 10−11
QHD / 1440p 9−10 5−6
4K / 2160p 6−7 4−5
low / 720p 45−50 35−40
medium / 1080p 30−33 21−24
The average gaming FPS of Radeon HD 7870 in Assassin's Creed Odyssey is 37% more, than Radeon R9 M390.

Full Specs

  Radeon HD 7870 Radeon R9 M390
Architecture GCN GCN
Code name Pitcairn XT Pitcairn
Type Desktop Laptop
Release date 5 March 2012 9 June 2015
Pipelines 1280 1024
Core clock speed 1000 MHz
Transistor count 2800 Million 5000 Million
Manufacturing process technology 28 nm 28 nm
Memory bus width 256 Bit 256 Bit
Memory clock speed 4800 MHz
Shared memory - -
DirectX DirectX 11.1, Shader 5.1
OpenGL 4.4
OpenCL Not Listed
Monero / XMR (CryptoNight) 0.39 kh/s
FreeSync +
Bus support PCIe 3.0
Bitcoin / BTC (SHA256) 242 Mh/s
Laptop size large
Eyefinity + +
HD3D +
PowerTune +
DualGraphics +
ZeroCore +
Switchable graphics +
Mantle +
Decred / DCR (Decred) 0.63 Gh/s
Ethereum / ETH (DaggerHashimoto) 16.6 Mh/s
Zcash / ZEC (Equihash) 145 Sol/s
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