Radeon HD 6850 1440SP Edition vs GeForce GT 640M

Primary details

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

Place in the ranking	836	not rated
Place by popularity	not in top-100	not in top-100
Power efficiency	5.22	no data
Architecture	Kepler (2012−2018)	TeraScale 2 (2009−2015)
GPU code name	GK107	Cypress
Market segment	Laptop	Desktop
Release date	22 March 2012 (12 years ago)	21 August 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	384	1440
Core clock speed	Up to 625 MHz	725 MHz
Boost clock speed	645 MHz	no data
Number of transistors	1,270 million	2,154 million
Manufacturing process technology	28 nm	40 nm
Power consumption (TDP)	32 Watt	151 Watt
Texture fill rate	20.00	52.20
Floating-point processing power	0.48 TFLOPS	2.088 TFLOPS
ROPs	16	32
TMUs	32	72

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	PCIe 2.0 x16
Length	no data	241 mm
Width	no data	2-slot
Supplementary power connectors	no data	2x 6-pin

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	GDDR5
Maximum RAM amount	2 GB	1 GB
Memory bus width	128bit	256 Bit
Memory clock speed	900 MHz	1000 MHz
Memory bandwidth	Up to 64.0 GB/s	128.0 GB/s
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	2x DVI, 1x HDMI, 1x DisplayPort
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	11.2 (11_0)
Shader Model	5.1	5.0
OpenGL	4.5	4.4
OpenCL	1.1	1.2
Vulkan	1.1.126	N/A
CUDA	+	-

Pros & cons summary

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Recency	22 March 2012	21 August 2012
Maximum RAM amount	2 GB	1 GB
Chip lithography	28 nm	40 nm
Power consumption (TDP)	32 Watt	151 Watt

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