Mobility Radeon HD 3870 X2 vs Radeon Sky 500

Find out if it is worth upgrading your current GPU setup by comparing Mobility Radeon HD 3870 X2 and Radeon Sky 500. 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 Mobility Radeon HD 3870 X2 and Radeon Sky 500. 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.

Mobility Radeon HD 3870 X2 is a Laptop Graphics Card

Note: Mobility Radeon HD 3870 X2 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 Mobility Radeon HD 3870 X2 here:

Main Specs

  Mobility Radeon HD 3870 X2 Radeon Sky 500
Power consumption (TDP) 110 Watt 150 Watt
Interface PCIe 2.0 x16 PCIe 3.0 x16
Supplementary power connectors 1x 6-pin
Memory type GDDR3 GDDR5
Maximum RAM amount 512 MB 4 GB
Display Connectors No outputs 1x DisplayPort
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  • Radeon Sky 500 has 36% more power consumption, than Mobility Radeon HD 3870 X2.
  • Mobility Radeon HD 3870 X2 is connected by PCIe 2.0 x16, and Radeon Sky 500 uses PCIe 3.0 x16 interface.
  • Mobility Radeon HD 3870 X2 has 508 GB more memory, than Radeon Sky 500.
  • Mobility Radeon HD 3870 X2 is used in Laptops, and Radeon Sky 500 - in Desktops.
  • Mobility Radeon HD 3870 X2 is build with RV6xx architecture, and Radeon Sky 500 - with GCN 1.0.
  • Core clock speed of Radeon Sky 500 is 290 MHz higher, than Mobility Radeon HD 3870 X2.
  • Mobility Radeon HD 3870 X2 is manufactured by 55 nm process technology, and Radeon Sky 500 - by 28 nm process technology.
  • Memory clock speed of Radeon Sky 500 is 3950 MHz higher, than Mobility Radeon HD 3870 X2.

Game benchmarks

high / 1080p 6−7 35−40
ultra / 1080p 4−5 21−24
QHD / 1440p 0−1 16−18
4K / 2160p 10−11
low / 720p 16−18 60−65
medium / 1080p 8−9 40−45
The average gaming FPS of Radeon Sky 500 in Assassin's Creed Odyssey is 355% more, than Mobility Radeon HD 3870 X2.

Full Specs

  Mobility Radeon HD 3870 X2 Radeon Sky 500
Architecture RV6xx GCN 1.0
Code name M88-XT CF Pitcairn
Type Laptop Desktop
Release date 1 September 2008 27 March 2013
Pipelines 640 1280
Core clock speed 660 MHz 950 MHz
Transistor count 666 million 2,800 million
Manufacturing process technology 55 nm 28 nm
Texture fill rate 10.56 76.00
Floating-point performance 2x 422.4 gflops 2,432 gflops
Length 242 mm
Memory bus width 256 Bit 256 Bit
Memory clock speed 850 MHz 4800 MHz
Memory bandwidth 54.4 GB/s 154 GB/s
Shared memory -
DirectX 10.1 (10_1) 12 (11_1)
Shader Model 4.1 5.1
OpenGL 3.3 4.6
OpenCL N/A 1.2
Vulkan N/A 1.2.131
Bus support PCIe 3.0
Laptop size large
Form factor full height / full length
DisplayPort count 1
Dual-link DVI support +
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