Radeon HD 6625M vs ATI Mobility HD 4870

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Primary details

GPU architecture, market segment, value for money and other general parameters compared.

Place in the ranking913not rated
Place by popularitynot in top-100not in top-100
ArchitectureTeraScale (2005−2013)TeraScale 2 (2009−2015)
GPU code nameM98Whistler
Market segmentLaptopLaptop
Release date9 January 2009 (16 years ago)4 January 2011 (14 years ago)

Detailed specifications

General parameters such as number of shaders, GPU core base clock and boost clock speeds, manufacturing process, texturing and calculation speed. Note that power consumption of some graphics cards can well exceed their nominal TDP, especially when overclocked.

Pipelines / CUDA cores800480
Core clock speed550 MHz450 MHz
Number of transistors956 million716 million
Manufacturing process technology55 nm40 nm
Power consumption (TDP)no data26 Watt
Texture fill rate22.0010.80
Floating-point processing power0.88 TFLOPS0.432 TFLOPS
ROPs168
TMUs4024
L1 Cache160 KB48 KB
L2 Cache256 KB256 KB

Form factor & compatibility

Information on compatibility with other computer components. Useful when choosing a future computer configuration or upgrading an existing one. For desktop graphics cards it's interface and bus (motherboard compatibility), additional power connectors (power supply compatibility).

Laptop sizelargeno data
InterfacePCIe 2.0 x16PCIe 2.0 x16

VRAM capacity and type

Parameters of VRAM installed: its type, size, bus, clock and resulting bandwidth. Integrated GPUs have no dedicated video RAM and use a shared part of system RAM.

Memory typeGDDR3DDR3
Maximum RAM amount512 MB1 GB
Memory bus width256 Bit128 Bit
Memory clock speed888 MHz800 MHz
Memory bandwidth56.83 GB/s25.6 GB/s
Shared memory-no data

Connectivity and outputs

This section shows the types and number of video connectors on each GPU. The data applies specifically to desktop reference models (for example, NVIDIA’s Founders Edition). OEM partners often modify both the number and types of ports. On notebook GPUs, video‐output options are determined by the laptop’s design rather than the graphics chip itself.

Display ConnectorsNo outputsNo outputs

API and SDK support

List of supported 3D and general-purpose computing APIs, including their specific versions.

DirectX10.1 (10_1)11.2 (11_0)
Shader Model4.15.0
OpenGL3.34.4
OpenCL1.11.2
VulkanN/AN/A

Pros & cons summary


Recency 9 January 2009 4 January 2011
Maximum RAM amount 512 MB 1 GB
Chip lithography 55 nm 40 nm

HD 6625M has an age advantage of 1 year, a 100% higher maximum VRAM amount, and a 37.5% more advanced lithography process.

We couldn't decide between Mobility Radeon HD 4870 and Radeon HD 6625M. We've got no test results to judge.

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ATI Mobility Radeon HD 4870
Mobility Radeon HD 4870
AMD Radeon HD 6625M
Radeon HD 6625M

Other comparisons

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