GeForce GT 640 OEM vs GT 620

Place in the ranking	1109	927
Place by popularity	not in top-100	not in top-100
Cost-effectiveness evaluation	0.02	no data
Power efficiency	1.37	2.36
Architecture	Fermi (2010−2014)	Kepler (2012−2018)
GPU code name	GF108	GK107
Market segment	Desktop	Desktop
Release date	15 May 2012 (12 years ago)	24 April 2012 (12 years ago)
Launch price (MSRP)	$39.99	no data

Cost-effectiveness evaluation

Performance to price ratio. The higher, the better.

no data

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	96	384
Core clock speed	700 MHz	797 MHz
Number of transistors	585 million	1,270 million
Manufacturing process technology	40 nm	28 nm
Power consumption (TDP)	49 Watt	50 Watt
Maximum GPU temperature	98 °C	no data
Texture fill rate	11.20	25.50
Floating-point processing power	0.2688 TFLOPS	0.6121 TFLOPS
ROPs	4	16
TMUs	16	32

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).

Bus support	PCI Express 2.0	no data
Interface	PCIe 2.0 x16	PCIe 3.0 x16
Length	145 mm	145 mm
Height	2.7" (6.9 cm)	no data
Width	1-slot	1-slot
Supplementary power connectors	None	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	DDR3
Maximum RAM amount	1 GB	2 GB
Memory bus width	64 Bit	128 Bit
Memory clock speed	1.8 GB/s	891 MHz
Memory bandwidth	14.4 GB/s	28.51 GB/s

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	Dual Link DVI-I, HDMI, VGA	1x DVI, 1x HDMI, 1x DisplayPort
Multi monitor support	+	no data
HDMI	+	+
HDCP	+	-
Maximum VGA resolution	2048x1536	no data
Audio input for HDMI	Internal	no data

Supported technologies

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

3D Blu-Ray

API compatibility

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

DirectX	12 (11_0)	12 (11_0)
Shader Model	5.1	5.1
OpenGL	4.2	4.6
OpenCL	1.1	1.2
Vulkan	N/A	1.1.126
CUDA	+	3.0

Gaming performance

Let's see how good the compared graphics cards are for gaming. Particular gaming benchmark results are measured in FPS.

Pros & cons summary

Performance score	0.97	1.70
Maximum RAM amount	1 GB	2 GB
Chip lithography	40 nm	28 nm
Power consumption (TDP)	49 Watt	50 Watt

GT 620 has 2% lower power consumption.

GT 640 OEM, on the other hand, has a 75.3% higher aggregate performance score, a 100% higher maximum VRAM amount, and a 42.9% more advanced lithography process.

The GeForce GT 640 OEM is our recommended choice as it beats the GeForce GT 620 in performance tests.

Should you still have questions concerning choice between the reviewed GPUs, ask them in Comments section, and we shall answer.