FireStream 9250 vs Mobility Radeon HD 4870 X2

When comparing FireStream 9250 and Mobility Radeon HD 4870 X2, 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 FireStream 9250 and Mobility Radeon HD 4870 X2 is the price. Does the additional cost justify the performance hit? Our comparison should help you make the right decision.

Mobility Radeon HD 4870 X2 is a Laptop Graphics Card

Note: Mobility Radeon HD 4870 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 4870 X2 here:

Main Specs

  FireStream 9250 Mobility Radeon HD 4870 X2
Power consumption (TDP) 150 Watt
Interface PCIe 2.0 x16 PCIe 2.0 x16
Supplementary power connectors 1x 6-pin
Memory type GDDR3 GDDR3, GDDR5
Maximum RAM amount 1 GB 2 GB
Display Connectors 1x DVI No outputs
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  • Both video cards are using PCIe 2.0 x16 interface connection to a motherboard.
  • Mobility Radeon HD 4870 X2 has 1 GB more memory, than FireStream 9250.
  • FireStream 9250 is used in Desktops, and Mobility Radeon HD 4870 X2 - in Laptops.
  • FireStream 9250 is build with TeraScale architecture, and Mobility Radeon HD 4870 X2 - with Terascale 1.
  • Core clock speed of FireStream 9250 is 75 MHz higher, than Mobility Radeon HD 4870 X2.
  • FireStream 9250 and Mobility Radeon HD 4870 X2 are manufactured by 55 nm process technology.
  • Memory clock speed of FireStream 9250 is 1098 MHz higher, than Mobility Radeon HD 4870 X2.

Game benchmarks

high / 1080p 2−3 9−10
ultra / 1080p 1−2 5−6
QHD / 1440p 0−1 0−1
low / 720p 12−14 21−24
medium / 1080p 5−6 12−14
The average gaming FPS of Mobility Radeon HD 4870 X2 in Assassin's Creed Odyssey is 140% more, than FireStream 9250.

Full Specs

  FireStream 9250 Mobility Radeon HD 4870 X2
Architecture TeraScale Terascale 1
Code name RV770 M98-XT
Type Desktop Laptop
Release date 16 June 2008 9 January 2009
Pipelines 800 1600
Core clock speed 625 MHz 550 MHz
Transistor count 956 million 956 million
Manufacturing process technology 55 nm 55 nm
Texture fill rate 25.00 22.00
Floating-point performance 1,000.0 gflops 2x 880.0 gflops
Memory bus width 256 Bit 256 Bit
Memory clock speed 1986 MHz 888 MHz
Memory bandwidth 63.55 GB/s 89.6 GB/s
Shared memory -
DirectX 10.1 (10_1) 10.1 (10_1)
Shader Model 4.1 4.1
OpenGL 3.3 3.3
OpenCL 1.1 1.1
Vulkan N/A N/A
Laptop size large
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