Radeon HD 6640G2 vs GeForce GTX 680M

Primary details

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

Place in performance ranking	470	not rated
Place by popularity	not in top-100	not in top-100
Cost-effectiveness evaluation	3.53	no data
Architecture	Kepler (2012−2018)	Terascale 2 (2009−2015)
GPU code name	N13E-GTX	no data
Market segment	Laptop	Laptop
Release date	4 June 2012 (11 years ago)	14 June 2011 (12 years ago)
Launch price (MSRP)	$310.50	no data
Current price	$293 (0.9x MSRP)	no data

Cost-effectiveness evaluation

Performance to price ratio. The higher, the better.

Detailed specifications

General performance parameters such as number of shaders, GPU core base clock and boost clock speeds, manufacturing process, texturing and calculation speed. These parameters indirectly speak of performance, but for precise assessment you have to consider their benchmark and gaming test results. Note that power consumption of some graphics cards can well exceed their nominal TDP, especially when overclocked.

Pipelines / CUDA cores	1344	560
CUDA cores	1344	no data
Core clock speed	720 MHz	no data
Boost clock speed	758 MHz	no data
Number of transistors	3,540 million	no data
Manufacturing process technology	28 nm	40 nm
Power consumption (TDP)	100 Watt	no data
Texture fill rate	80.6 billion/sec	no data
Floating-point performance	2,038 gflops	no data

Form factor & compatibility

Information on GeForce GTX 680M and Radeon HD 6640G2 compatibility with other computer components. Useful when choosing a future computer configuration or upgrading an existing one. For notebook video cards it's notebook size, connection slot and bus, if the video card is inserted into a slot instead of being soldered to the notebook motherboard.

Laptop size	large	medium sized
Bus support	PCI Express 3.0	no data
Interface	MXM-B (3.0)	no data
Supplementary power connectors	None	no data
SLI options	+	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	GDDR5	no data
Maximum RAM amount	4 GB	no data
Memory bus width	256 Bit	no data
Memory clock speed	1800 MHz	no data
Memory bandwidth	115.2 GB/s	no data
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

Supported technologies

Supported technological solutions. This information will prove useful if you need some particular technology for your purposes.

Optimus

+

no data

API compatibility

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

DirectX	12 API	11
Shader Model	5.1	no data
OpenGL	4.5	no data
OpenCL	1.1	no data
Vulkan	1.1.126	no data
CUDA	+	no data

Pros & cons summary

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Recency	4 June 2012	14 June 2011
Chip lithography	28 nm	40 nm

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