Radeon HD 4870 vs Radeon R9 M275

Find out if it is worth upgrading your current GPU setup by comparing Radeon HD 4870 and Radeon R9 M275. 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 4870 and Radeon R9 M275. 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 M275 is a Laptop Graphics Card

Note: Radeon R9 M275 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 M275 here:

Main Specs

  Radeon HD 4870 Radeon R9 M275
Power consumption (TDP) 150 Watt
Interface PCIe 2.0 x16 PCIe 3.0 x16
Supplementary power connectors 2x 6-pin
Memory type GDDR5 GDDR5
Maximum RAM amount 1 GB 4 GB
Display Connectors 2x DVI, 1x S-Video No outputs
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  • Radeon HD 4870 is connected by PCIe 2.0 x16, and Radeon R9 M275 uses PCIe 3.0 x16 interface.
  • Radeon R9 M275 has 3 GB more memory, than Radeon HD 4870.
  • Radeon HD 4870 is used in Desktops, and Radeon R9 M275 - in Laptops.
  • Radeon HD 4870 is build with TeraScale architecture, and Radeon R9 M275 - with GCN.
  • Core clock speed of Radeon R9 M275 is 175 MHz higher, than Radeon HD 4870.
  • Radeon HD 4870 is manufactured by 55 nm process technology, and Radeon R9 M275 - by 28 nm process technology.
  • Memory clock speed of Radeon R9 M275 is 900 MHz higher, than Radeon HD 4870.

Game benchmarks

high / 1080p 3−4 0−1
ultra / 1080p 1−2
QHD / 1440p 0−1 0−1
low / 720p 14−16 12−14
medium / 1080p 6−7 3−4
The average gaming FPS of Radeon HD 4870 in Assassin's Creed Odyssey is 25% more, than Radeon R9 M275.

Full Specs

  Radeon HD 4870 Radeon R9 M275
Architecture TeraScale GCN
Code name RV770 Venus
Type Desktop Laptop
Release date 25 June 2008 1 August 2014
Pipelines 800 640
Core clock speed 750 MHz 925 MHz
Boost Clock 925 MHz
Transistor count 956 million 1,500 million
Manufacturing process technology 55 nm 28 nm
Texture fill rate 30.00 37.00
Floating-point performance 1,200.0 gflops 1,184 gflops
Length 250 mm
Memory bus width 256 Bit 128 Bit
Memory clock speed 3600 MHz 4500 MHz
Memory bandwidth 115.2 GB/s 64 GB/s
Shared memory -
DirectX 10.1 (10_1) 12 (11_1)
Shader Model 4.1 5.1
OpenGL 3.3 4.6
OpenCL 1.1 1.2
Vulkan N/A 1.2.131
Bitcoin / BTC (SHA256) 122 Mh/s
Laptop size large
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