GeForce GT 640 OEM vs Quadro P400

Place in the ranking	677	935
Place by popularity	not in top-100	not in top-100
Cost-effectiveness evaluation	3.58	no data
Architecture	Pascal (2016−2021)	Kepler (2012−2018)
GPU code name	GP107	GK107
Market segment	Workstation	Desktop
Release date	7 February 2017 (7 years ago)	24 April 2012 (12 years ago)
Launch price (MSRP)	$119.99	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	256	384
Core clock speed	1228 MHz	797 MHz
Boost clock speed	1252 MHz	no data
Number of transistors	3,300 million	1,270 million
Manufacturing process technology	14 nm	28 nm
Power consumption (TDP)	30 Watt	50 Watt
Texture fill rate	20.03	25.50
Floating-point processing power	0.641 TFLOPS	0.6121 TFLOPS
ROPs	16	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).

Interface	PCIe 3.0 x16	PCIe 3.0 x16
Length	145 mm	145 mm
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	GDDR5	DDR3
Maximum RAM amount	2 GB	2 GB
Memory bus width	64 Bit	128 Bit
Memory clock speed	1002 MHz	891 MHz
Memory bandwidth	32.06 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	3x mini-DisplayPort	1x DVI, 1x HDMI, 1x DisplayPort
HDMI	-	+

API compatibility

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

DirectX	12 (12_1)	12 (11_0)
Shader Model	6.4	5.1
OpenGL	4.6	4.6
OpenCL	1.2	1.2
Vulkan	1.2.131	1.1.126
CUDA	6.1	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	4.26	1.70
Recency	7 February 2017	24 April 2012
Chip lithography	14 nm	28 nm
Power consumption (TDP)	30 Watt	50 Watt

Quadro P400 has a 150.6% higher aggregate performance score, an age advantage of 4 years, a 100% more advanced lithography process, and 66.7% lower power consumption.

The Quadro P400 is our recommended choice as it beats the GeForce GT 640 OEM in performance tests.

Be aware that Quadro P400 is a workstation graphics card while GeForce GT 640 OEM is a desktop one.

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