GeForce GT 555M 2 GB vs GT 640M

Primary details

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

Place in performance ranking	803	not rated
Place by popularity	not in top-100	not in top-100
Cost-effectiveness evaluation	0.22	no data
Architecture	Kepler (2012−2018)	Fermi 2.0 (2010−2014)
GPU code name	N13P-GS	GF116
Market segment	Laptop	Desktop
Release date	22 March 2012 (12 years ago)	26 March 2012 (12 years ago)
Current price	$310	$9.99

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	384	144
CUDA cores	384	no data
Core clock speed	Up to 625 MHz	675 MHz
Boost clock speed	645 MHz	no data
Number of transistors	1,270 million	1,170 million
Manufacturing process technology	28 nm	40 nm
Power consumption (TDP)	32 Watt	35 Watt
Texture fill rate	Up to 20.0 billion/sec	16.20
Floating-point performance	480.0 gflops	no data

Form factor & compatibility

Information on GeForce GT 640M and GeForce GT 555M 2 GB compatibility with other computer components. Useful when choosing a future computer configuration or upgrading an existing one. For desktop video cards it's interface and bus (motherboard compatibility), additional power connectors (power supply compatibility). 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	medium sized	no data
Bus support	PCI Express 2.0, PCI Express 3.0	no data
Interface	PCIe 3.0 x16	PCIe 2.0 x16
Width	no data	IGP
Supplementary power connectors	no data	None

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	DDR3
Maximum RAM amount	2 GB	2 GB
Memory bus width	128bit	128 Bit
Memory clock speed	1800 - 4000 MHz	1800 MBps
Memory bandwidth	Up to 64.0 GB/s	28.8 GB/s
Shared memory	-	no data

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	Portable Device Dependent
HDMI	+	no data
HDCP	+	no data
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	+	no data
Optimus	+	no data

API compatibility

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

DirectX	12 API	12 (11_0)
Shader Model	5.1	5.1
OpenGL	4.5	4.6
OpenCL	1.1	1.1
Vulkan	1.1.126	N/A
CUDA	+	2.1

Pros & cons summary

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Chip lithography	28 nm	40 nm
Power consumption (TDP)	32 Watt	35 Watt

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