Radeon HD 6620G + HD 7450M Dual Graphics vs HD 7640G

Primary details

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

Place in the ranking	1057	not rated
Place by popularity	not in top-100	not in top-100
Power efficiency	2.37	no data
Architecture	TeraScale 3 (2010−2013)	Terascale 2 (2009−2015)
GPU code name	Devastator Lite	no data
Market segment	Laptop	Laptop
Release date	15 May 2012 (12 years ago)	8 February 2012 (12 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 cores	256	560
Core clock speed	496 MHz	400 / 700 MHz
Boost clock speed	685 MHz	no data
Number of transistors	1,303 million	no data
Manufacturing process technology	32 nm	40 nm
Power consumption (TDP)	35 Watt	no data
Texture fill rate	10.96	no data
Floating-point processing power	0.3507 TFLOPS	no data
ROPs	8	no data
TMUs	16	no data

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 size	medium sized	no data
Interface	IGP	no data

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 type	System Shared	no data
Maximum RAM amount	System Shared	no data
Memory bus width	System Shared	no data
Memory clock speed	System Shared	1800 MHz
Shared memory	+	+

Connectivity and outputs

Types and number of video connectors present on the reviewed GPUs. As a rule, data in this section is precise only for desktop reference ones (so-called Founders Edition for NVIDIA chips). OEM manufacturers may change the number and type of output ports, while for notebook cards availability of certain video outputs ports depends on the laptop model rather than on the card itself.

Display Connectors

No outputs

no data

API compatibility

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

DirectX	11.2 (11_0)	11
Shader Model	5.0	no data
OpenGL	4.4	no data
OpenCL	1.2	no data
Vulkan	N/A	-

Pros & cons summary

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Recency	15 May 2012	8 February 2012
Chip lithography	32 nm	40 nm

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