GeForce 9400M (G) / ION (LE) vs GT 640M

Primary details

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

Place in the ranking	839	not rated
Place by popularity	not in top-100	not in top-100
Power efficiency	5.17	no data
Architecture	Kepler (2012−2018)	no data
GPU code name	GK107	MCP79MX
Market segment	Laptop	Laptop
Release date	22 March 2012 (12 years ago)	14 October 2008 (16 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	384	16
Core clock speed	Up to 625 MHz	450 MHz
Boost clock speed	645 MHz	no data
Number of transistors	1,270 million	282 Million
Manufacturing process technology	28 nm	65 nm
Power consumption (TDP)	32 Watt	12 Watt
Texture fill rate	20.00	no data
Floating-point processing power	0.48 TFLOPS	no data
ROPs	16	no data
TMUs	32	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
Bus support	PCI Express 2.0, PCI Express 3.0	no data
Interface	PCIe 3.0 x16	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	DDR3\GDDR5	no data
Maximum RAM amount	2 GB	no data
Memory bus width	128bit	no data
Memory clock speed	900 MHz	no data
Memory bandwidth	Up to 64.0 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
HDMI	+	-
HDCP	+	-
Maximum VGA resolution	Up to 2048x1536	no data

Supported technologies

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

3D Blu-Ray	+	-
Optimus	+	-

API compatibility

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

DirectX	12 API	10.0
Shader Model	5.1	no data
OpenGL	4.5	no data
OpenCL	1.1	no data
Vulkan	1.1.126	-
CUDA	+	-

Synthetic benchmark performance

Non-gaming benchmark results comparison. The combined score is measured on a 0-100 point scale.

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Pros & cons summary

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Recency	22 March 2012	14 October 2008
Chip lithography	28 nm	65 nm
Power consumption (TDP)	32 Watt	12 Watt

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